Alumni Mineralogy

Former Lecturer

Prof. Dr. Matthias Göbbels

† 28.6.2024

Research focus

Experimental determination of oxide and silicate multi-component-systems
Study of the correlation of crystal structure, crystal chemistry and physical property for materials improvement
Crystal growth of oxide materials
Refractories
Experimental petrology

Publications

2023

Goetze J., Göbbels M.:
Introduction to Applied Mineralogy
2023
ISBN: 9783662648667
DOI: 10.1007/978-3-662-64867-4

2021

Klemenz L., Richter A., Langhof N., Göbbels M.:
Structure and principles of oxidic hexaphases: A review
In: Open Ceramics 7 (2021), Article No.: 100142
ISSN: 2666-5395
DOI: 10.1016/j.oceram.2021.100142

2020

Göbbels M., Goetze J., Lieber W.:
Physikalisch-chemische Mineralogie kompakt
Berlin, Heidelberg: Springer Spektrum, 2020
ISBN: 9783662607275
DOI: 10.1007/978-3-662-60728-2
Spies A., Bauer M., Klaus S., Buhr A., Göbbels M.:
Hexa-Aluminat Mischkristallphasen in spinellhaltigen Feuerbetonen - Mineralogische Untersuchungen im System CaO-Al2O3-MgO
In: Keramische Zeitschrift 72 (2020), p. 34-41
ISSN: 0023-0561
DOI: 10.1007/s42410-020-0148-6

2017

Boß M., Murgan A., Bauer F., Göbbels M.:
Grundsätzliche Überlegungen zur Edition des Bestandes an Münzen der FAU als frei zugängliche Datenbank im WWW
In: Magazin für digitale Editionswissenschaften 3 (2017), p. 7-19
ISSN: 2364-0855
Open Access: https://www.mde.fau.de/?page_id=431
URL: https://www.mde.fau.de/files/2017/03/MdE_Band3_Boss_Murgan_Bauer_G%C3%B6bbels.pdf
Goetze J., Göbbels M.:
Einführung in die Angewandte Mineralogie
2017
ISBN: 9783662502648
DOI: 10.1007/978-3-662-50265-5

2016

Datta K., Richter A., Göbbels M., Keen DA., Neder R.:
Direct mapping of microscopic polarization in ferroelectric x(BiScO3)-(1-x)(PbTiO3) throughout its morphotropic phase boundary
In: Physical Review B - Condensed Matter and Materials Physics 93 (2016), Article No.: 064102
ISSN: 1550-235X
DOI: 10.1103/PhysRevB.93.064102
Naber C., Götz-Neunhoeffer F., Göbbels M., Rößler C., Neubauer J.:
Synthesis of monocrystalline Ca3SiO5 using the optical floating zone method
In: Cement and Concrete Research 85 (2016), p. 156-162
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2016.04.008

2015

Datta K., Richter A., Göbbels M., Neder R., Mihailova B.:
Mesoscopic-scale structure and dynamics near the morphotropic phase boundary of (1-x)PbTiO3-xBiScO3
In: Physical Review B - Condensed Matter and Materials Physics 92 (2015), Article No.: 024107
ISSN: 1550-235X
DOI: 10.1103/PhysRevB.92.024107

2014

Datta K., Richter A., Göbbels M., Neder R., Mihailova B.:
Atomistic origin of huge response functions at the morphotropic phase boundary of (1-x)Na0.5Bi0.5TiO3-xBaTiO(3)
In: Physical Review B 90 (2014)
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.90.064112

2012

Boß M., Breuckmann B., Göbbels M.:
Auf der Spurensuche des Handwerks zum Prägen antiker Münzen unter Einsatz von höchstaufgelösten digitalen 2D- und 3D-Modellen
In: Konferenzband EVA 2012 Berlin Elektronische Medien & Kunst, Kultur, Historie, 7. – 9. November 2012, 19. Berliner Veranstaltung der internationalen EVA-Serie Electronic Imaging & the Visual Arts, 2012, p. 73-78

2010

Guguschev C., Goetze J., Göbbels M.:
Cathodoluminescence microscopy and spectroscopy of synthetic ruby crystals grown by the optical floating zone technique
In: American Mineralogist 95 (2010), p. 449-455
ISSN: 0003-004X
DOI: 10.2138/am.2010.3291
Richter A., Göbbels M.:
Phase Equilibria and Crystal Chemistry in the System CaO-Al_2_O_3_-Y_2_O_3_
In: Journal of Phase Equilibria and Diffusion 31 (2010), p. 157-163
ISSN: 1547-7037
DOI: 10.1007/s11669-010-9672-1

2009

Langhof N., Göbbels M.:
Hexaferrites an phase relations in the iron-rich part of the system Sr-La-Co-Fe-O
In: Journal of Solid State Chemistry 182 (2009), p. 2725-2732
ISSN: 0022-4596
DOI: 10.1016/j.jssc.2009.07.024
Langhof N., Seifert D., Göbbels M., Toepfer J.:
Reinvestigation of the Fe-rich part of the pseudo-binary system SrO-Fe_2_O_3_
In: Journal of Solid State Chemistry 182 (2009), p. 2409-2416
ISSN: 0022-4596
DOI: 10.1016/j.jssc.2009.05.039

2007

Göbbels M.:
From phosphors to ceramic magnets. Stability, crystal chemistry and applications of Hexa-aluminates and Hexa-ferrites
In: Geochimica Et Cosmochimica Acta 71 (2007), p. 15S
ISSN: 0016-7037
Götz-Neunhoeffer F., Neubauer J., Enderle R., Göbbels M.:
Investigation of the beta'- to alpha-phase transformation temperature of (Ca1-xMgx)3(PO4)2 solid solutions
In: Zeitschrift für Kristallographie, Supplement 2 (2007), p. 375-380
ISSN: 0930-486X

2006

Göbbels M., Schmid M.:
Slag infiltration in refractories employing a crystal growth method with thermal gradient
49 th International Colloquium on Refractories (Aachen, 7. November 2006 - 8. November 2006)
In: Stahl & Eisen Special: Refractories for Metallurgy, Düsseldorf: 2006
Götz-Neunhoeffer F., Göbbels M., Enderle R.:
Investigation of the ß-alpha TCP phase transformation in dependence of Mg-content
19th General Meeting of the IMA (Kobe, Japan, 23. July 2006 - 28. July 2006)
In: Proc. of the 19th General Meeting of the IMA 2006
Götz-Neunhoeffer F., Neubauer J., Göbbels M., Enderle R.:
Effect of Mg2+ content on lattice parameter and phase transformation temperature of β-α TCP
In: European Cells & Materials 11 (2006)
ISSN: 1473-2262
URL: https://www.scopus.com/record/display.uri?eid=2-s2.0-84860773066&origin=inward
Mashkina E., Magerl A., Ollivier J., Göbbels M., Seifert F.:
Oxygen mobility in the perovskite SrTi1-xFexO3-ð (x = 0.8)
In: Physical Review B - Condensed Matter and Materials Physics 74 (2006), p. 214106
ISSN: 1550-235X

2005

Enderle R., Götz-Neunhoeffer F., Göbbels M., Müller F., Greil P.:
Influence of magnesium doping on the phase transformation temperature of Beta-TCP ceramics examined by Rietveld refinement
In: Biomaterials Vol. 26 (2005), p. 3379-3384
ISSN: 0142-9612
DOI: 10.1016/j.biomaterials.2004.09.017
Göbbels M., Enderle R., Götz-Neunhoeffer F.:
Entwicklung einer porösen Calciumphosphat-Keramik im Hinblick auf die Verwendung als Knochenersatzstoff
In: European Journal of Mineralogy (2005), p. 48
ISSN: 0935-1221
Göbbels M., Pack A., Hoernes S., Bross R., Buhr A.:
Stable oxygen isotopes - A new approach for tracing the origin of oxide inclusions in steels
In: European Journal of Mineralogy 17 (2005), p. 483-493
ISSN: 0935-1221
DOI: 10.1127/0935-1221/2005/0017-0483
Götz-Neunhoeffer F., Enderle R., Göbbels M.:
Synthesis and characterization of cellular apatite-whitlockite composites for bone substitution
In: Schriftenreihe der Deutschen Gesellschaft für Geowissenschaften (2005), p. 142
ISSN: 1860-1782
Mashkina E., Baier M., Magerl A., Göbbels M., Seifert F.:
Resistivity relaxation, a new approach to study ionic mobility in perovskite mixed conductors like CaTi0.7Fe0.3O3-ð
In: Ionics 11 (2005), p. 269-274
ISSN: 0947-7047
Schmid M., Götz-Neunhoeffer F., Neubauer J., Göbbels M.:
Synthesis and Rietveld refinement of Ferri-Gehlenite solid solution series
In: Zeitschrift der Deutschen Gesellschaft für Geowissenschaften (2005), p. 337
ISSN: 1860-1804
Schmid M., Götz-Neunhoeffer F., Neubauer J., Göbbels M., Brandes M., Johannes HH., Kowalsky W.:
In situ pH-Wert-Messungen Mischungen aus Calciumaluminatzement mit Calciumsulfat
In: European Journal of Mineralogy 17(1) (2005), p. 134
ISSN: 0935-1221

2004

Göbbels M.:
Crystal chemistry and crystal structures of complex hexa-aluminates and hexa-ferrites
Nikasch Christian, Göbbels Matthias:
Phase relations and lattice parameters in the system SrO-BaO-Nb2O5 focussing on SBN (SrxBa1-xNb2O6)
In: Journal of Crystal Growth 269 (2004), p. 324 - 332
ISSN: 0022-0248
DOI: 10.1016/j.jcrysgro.2004.04.037
Götz-Neunhoeffer F., Göbbels M., Enderle R., Neubauer J., Zeschky J.:
Degradable bone substituition material based on cellular Ca-phosphates
8th International Congress on Applied Mineralogy (Sao Paulo)
In: Applied Mineralogy 2004

2003

Enderle R., Göbbels M., Götz-Neunhoeffer F.:
Entwicklung einer katalytisch funktionalen porösen Keramik auf Basis hydraulisch aktiver Oxid-Keramiken
In: European Journal of Mineralogy Vol. 15 (2003), p. 47
ISSN: 0935-1221
Göbbels M., Götz-Neunhoeffer F., Neubauer J.:
Gips und Anhydrit als Rohstoff für die Baustoffindustrie - Vorkommen, Abbau und Weiterverarbeitung
In: Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 85 (2003), p. 65-72
ISSN: 0078-2947
Nikasch C., Göbbels M.:
Phasenbeziehungen im System SrO-BaO-Nb2O5 photorefraktiver Materialien
DMG (Bochum)
In: Berichte der DMG 2003
Pack A., Hoernes S., Göbbels M.:
A new and innovative application of stable oxygen isotope chemistry
In: European Journal of Mineralogy 15 (2003), p. 144
ISSN: 0935-1221
Schmid M., Götz-Neunhoeffer F., Neubauer J., Göbbels M.:
Synthese und Rietveldverfeinerung der Gehlenit-Mischkristallreihe
In: European Journal of Mineralogy Vol 15 (2003), p. 174
ISSN: 0935-1221

2002

Göbbels M.:
Beta-alumina and magnetoplumbite-type compounds in the systems CaO/SrO/BaO-Al2O3/Fe2O3-MgO
IMA (Edinburgh, 6. June 2002 - 6. June 2002)
In: Mineralogy for the New Millennium 2002
Göbbels M., Dauscher M., Jüstel T.:
Ba-beta-alumina phosphors: chrystal chemistry and stability
E-MRS Spring Meeting (Strasbourg, 18. June 2002 - 21. June 2002)
In: E-MRS Spring Meeting 2002 2002
Mashkina Elena, L.A.Dunyushkina, A.K.Demin, Göbbels Matthias, Hock Rainer, Magerl Andreas:
Electrical Conductivity in BaTi1-xFexO3-d system
Fifth European Solid Oxide Fuel Cell Forum (Luzern)
In: Proceeding of Fifth European Solid Oxide Fuel Cell Forum 2002
Stammler M., Eisenbeiß H., Ristein J., Neubauer J., Göbbels M., Ley L., Ristein J., Ley L.:
Growth of high-quality homoepitaxial diamond films by HF-CVD
In: Diamond and Related Materials 11 (2002), p. 504-508
ISSN: 0925-9635
DOI: 10.1016/S0925-9635(01)00627-6

2001

Eisenbeiß H., Stammler M., Ristein J., Ley L., Göbbels M., Neubauer J.:
Herstellung und Charakterisierung stickstoffreicher, qualitativ hochwertiger homo-epitaktischer Diamantfilme mittels Heißdraht-CVD
In: European Journal of Mineralogy 13 (2001), p. 48
ISSN: 0935-1221

1999

Leiste V., Baier A., Tobschall HJ., Göbbels M.:
Die Bedeutung der Geologie und Mineralogie im geplanten Wissenschaftsmuseum Erlangen
In: Geologische Blätter für Nordost-Bayern und angrenzende Gebiete 49 (1999), p. 243-246
ISSN: 0016-7797
Risch A., Gäberlein P., Neubauer J., Göbbels M.:
Texture analysis of (Bi,Pb)-2212 in cold isostatic pressed bulk material using the Rietveld method
In: European Journal of Mineralogy (1999), p. 192
ISSN: 0935-1221

1997

Göbbels M.:
Aluminat- und Ferrat-Phasen - Struktur-Kristallchemie-Eigenschaft komplexer Oxidverbindungen
In: European Journal of Mineralogy Vol. 9 (1997), p. 17
ISSN: 0935-1221
Göbbels M.:
Stapelungsstrukturen von Verbindungen der beta-Tonerde- und Magnetoplumbit-Familien - Ansatz einer strukturellen Systematik
In: Zeitschrift für Kristallographie, Supplement Issue No.12 (1997), p. 47
ISSN: 0930-486X

1996

Iyi N., Göbbels M.:
Crystal structure of the new magnetoplumbite related compound in the system SrO Al_2_O_3_-MgO
In: Journal of Solid State Chemistry 122 (1996), p. 46-52
ISSN: 0022-4596

It is with great sadness that we anounce the passing of Professor Dr. Matthias Göbbels on 28 June 2024. His death leaves a great void in our academic community and in the hearts of all those who had the privilege of knowing and working with him.

Professor Göbbels was an outstanding personality in his field and dedicated his life to science and teaching. After studying at the RWTH Aachen University, he earned his doctorate in natural sciences (Mineralogy) and began his impressive career as a lecturer and researcher. His career led him through several stations in Japan (National Institute for Research in Inorganic Materials in Tsukuba) in the years 1987-1992 towards his habilitation in Mineralogy & Cristallography in 1996 in the field of oxide materials for optical, magnetic and ion-conducting properties. In 1997, Matthias Göbbels took over the Chair of Mineralogy at FAU, initially as a deputy and from 1998 as Chairholder finally.
From 1999 to 2007, Matthias Göbbels was FAU Senator with the Faculty of Natural Sciences III and from 2011 to 2013 a member of the Teaching and Study Committee and Research and Young Academics Committee. He then took on the role of Dean of Studies for the geosciences degree programs for many years. Matthias Göbbels was also Associate Editor of the European Journal for Mineralogy from 1999-2007.

His enthusiasm for mineralogy was an inspiration for many geoscience students. Many challenges of students during their studies could be resolved over a cup of coffee in his office. During interdisciplinary field trips, he was able to impart knowledge far beyond the textbooks. In his role as Chair of the Examination Board and Dean of Studies, students could always rely on an understanding university lecturer.
At the Chair of Mineralogy he created an exceptional environment for academic and personal development. Under his leadership, new working groups were established, thus diversifying research in the field of Applied Mineralogy. The well-being of everyone and the community was of great concern to him. We miss Matthias Göbbels very much.

The GeoZentrum of the FAU Erlangen-Nürnberg
with all colleagues, employees, doctoral candidates and students

Former PhDs

M.Sc. Sophia Villmow

Dissertation

coming soon

Research focus

K⁴project – Carbon dioxide reduction through low-lime clinker and carbonation hardening in concrete production
Investigation of the carbonation behavior of clinker phases and their optimization
Belitic cement systems with various RCP materials as limestone substituents (carbonation-hardening)
Evaluation of methods for the effective carbonation of pure cementitious phases

Publications

2026

Villmow S., Mielkau A., Zajac M., Neubauer J.:
Wet carbonation potential of Mg- and Al-bearing calcium silicate clinker phases
In: Journal of CO2 Utilization 103 (2026), Article No.: 103288
ISSN: 2212-9820
DOI: 10.1016/j.jcou.2025.103288

2025

Villmow S., Mielkau A., Zajac M., Neubauer J.:
Investigation of the carbonation mechanisms and kinetics in binary systems with C2S and Ca-Mg silicates
In: Construction and Building Materials 505 (2025), p. 144756
ISSN: 0950-0618
DOI: 10.1016/j.conbuildmat.2025.144756

2023

Villmow S., Mielkau A., Götz-Neunhoeffer F., Neubauer J.:
Wet carbonation of C3A and pre-hydrated C3A
In: Cement and Concrete Research 173 (2023), Article No.: 107259
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2023.107259

Dr. rer. nat. Nicholas Fobbe

Dissertation

Trocknungsprozesse von Gipsprodukten: Ursachen von Ausblühungen und deren Verhinderung

Forschungsschwerpunkte

Hydration and thermodynamic modelling of Gypsum plasters
Mixtures of Gypsum plasters with Portland cement
Hydration of CSA cements and the influence of PCE-superplasticizers

Publikationen

2023

Fobbe N., Götz-Neunhoeffer F., Foerthner S., Foerster H., Jansen D.:
Drying of gypsum plaster prisms: prevention of visible sodium sulfate efflorescence through calcium formate addition
In: Materials and Structures 56 (2023), Article No.: 125
ISSN: 1359-5997
DOI: 10.1617/s11527-023-02213-w
Fobbe N., Götz-Neunhoeffer F., Jansen D.:
The influence of calcium formate on the hydration of calcium sulfate hemihydrate
In: Materials and Structures 56 (2023)
ISSN: 1359-5997
DOI: 10.1617/s11527-023-02181-1
Pott U., Crasselt C., Fobbe N., Haist M., Heinemann M., Hellmann S., Ivanov D., Jakob C., Jansen D., Lei L., Ran L., Julian L., Dirk L., Mechtcherine V., Neubauer J., David N., Plank J., Silvia R., Thomas S., Schielde C., Wolfram S., Christof S., Thomas S., Strybny B., Neven U., Wolf JJ., Xiao P., Stephan D.:
Characterization data of reference materials used for phase II of the priority program DFG SPP 2005 “Opus Fluidum Futurum – Rheology of reactive, multiscale, multiphase construction materials”
In: Data in Brief (2023), Article No.: 108902
ISSN: 2352-3409
DOI: 10.1016/j.dib.2023.108902

2021

Fobbe N., Götz-Neunhoeffer F., Foerster H., Foerthner S., Jansen D.:
Efflorescence during the drying of a technical gypsum body: Application of thermodynamic principles
In: Construction and Building Materials 303 (2021), Article No.: 124445
ISSN: 0950-0618
DOI: 10.1016/j.conbuildmat.2021.124445

2020

Jansen D., Wolf J., Fobbe N.:
The hydration of nearly pure ye'elimite with a sulfate carrier in a stoichiometric ettringite binder system. Implications for the hydration process based on in-situ XRD, 1H-TD-NMR, pore solution analysis, and thermodynamic modeling
In: Cement and Concrete Research 127 (2020), Article No.: 105923
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2019.105923
Nohl T., Wetterich J., Fobbe N., Munnecke A.:
Lithological dependence of aragonite preservation in monospecific gastropod deposits of the Miocene Mainz Basin: Implications for the (dia-)genesis of limestone–marl alternations
In: Journal of Sedimentary Research 90 (2020), p. 1500-1509
ISSN: 1527-1404
DOI: 10.2110/jsr.2020.057

Dr. rer. nat. Cordula Wolf

Dissertation

Linking early hydrate phase formation and rheological properties in Portland cement-based systems: Ettringite as a key factor in controlling rheology with regard to new technologies such as 3D printing

Research focus

Investigations on phase development, kinetics and rheology during the early hydration of OPC pastes
Influence of mineral admixtures and PCEs on the kinetics and the rheology of OPC pastes

Publications

2026

Wolf C., Pott U., Jansen D., Stephan D., Neubauer J.:
Tailored Yield Stress for 3D Printing Using Low-Clinker Cement
DOI: 10.1007/978-3-032-15391-3_10

2025

John E., Jakob C., Pott U., Sando M.:
Repeatability and reproducibility challenges of isothermal heat flow calorimetry with in situ mixing
In: Cement and Concrete Research 194 (2025), Article No.: 107872
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2025.107872

2024

Jakob C., Rudolph J., Wolf JJ., Neubauer J.:
Hydration of a 2-component CSA-OPC-mix – timing of component blending & setting on demand
In: Advances in Cement Research (2024), p. 1-25
ISSN: 0951-7197
DOI: 10.1680/jadcr.23.00231

2023

Jakob C., Jansen D., Dengler J., Neubauer J.:
Controlling ettringite precipitation and rheological behavior in ordinary Portland cement paste by hydration control agent, temperature and mixing
In: Cement and Concrete Research 166 (2023), p. 107095
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2023.107095
Nicia D., Jakob C., Jansen D., Ivanov D., Mazanec O., Dengler J., Neubauer J., Lowke D.:
Thixotropy of superplasticized cement pastes – Underlying mechanisms considering the polycarboxylate molecular structure, interparticle interactions and hydration kinetics
In: Cement and Concrete Research 173 (2023), Article No.: 107289
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2023.107289
Pott U., Crasselt C., Fobbe N., Haist M., Heinemann M., Hellmann S., Ivanov D., Jakob C., Jansen D., Lei L., Ran L., Julian L., Dirk L., Mechtcherine V., Neubauer J., David N., Plank J., Silvia R., Thomas S., Schielde C., Wolfram S., Christof S., Thomas S., Strybny B., Neven U., Wolf JJ., Xiao P., Stephan D.:
Characterization data of reference materials used for phase II of the priority program DFG SPP 2005 “Opus Fluidum Futurum – Rheology of reactive, multiscale, multiphase construction materials”
In: Data in Brief (2023), Article No.: 108902
ISSN: 2352-3409
DOI: 10.1016/j.dib.2023.108902
Pott U., Jakob C., Dorn T., Stephan D.:
Investigation of a shotcrete accelerator for targeted control of material properties for 3D concrete printing injection method
In: Cement and Concrete Research 173 (2023), Article No.: 107264
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2023.107264
Pott U., Jakob C., Wolf J., Stephan D.:
Comparison of physical and physicochemical methods for 3D printing application with the focus on the unconfined uniaxial compression test
In: Construction and Building Materials 395 (2023), Article No.: 132260
ISSN: 0950-0618
DOI: 10.1016/j.conbuildmat.2023.132260

2020

Jakob C., Jansen D., Pott U., Neubauer J.:
Comparing Phase Development and Rheological Properties of OPC Paste Within the First Hour of Hydration
In: Viktor Mechtcherine, Kamal Khayat, Egor Secrieru (ed.): Rheology and Processing of Construction Materials, Springer Netherlands, 2020, p. 219-227 (RILEM Bookseries, Vol.23)
DOI: 10.1007/978-3-030-22566-7_26
Lu ZC., Haist M., Ivanov D., Jakob C., Jansen D., Schmid M., Kissling PA., Leinitz S., Link J., Mechtcherine V., Neubauer J., Plank J., Schmidt W., Schilde C., Schroefl C., Sowoidnich T., Stephan D.:
Characterization data of reference cement CEM III/A 42.5N used for priority program DFG SPP 2005 “Opus Fluidum Futurum – Rheology of reactive, multiscale, multiphase construction materials”
In: Data in Brief 30 (2020), Article No.: 105524
ISSN: 2352-3409
DOI: 10.1016/j.dib.2020.105524
Pott U., Ehm C., Jakob C., Stephan D.:
Investigation of the Early Cement Hydration with a New Penetration Test, Rheometry and In-Situ XRD
In: Viktor Mechtcherine, Kamal Khayat, Egor Secrieru (ed.): Rheology and Processing of Construction Materials, Springer Netherlands, 2020, p. 246-255 (RILEM Bookseries, Vol.23)
DOI: 10.1007/978-3-030-22566-7_29
Pott U., Jakob C., Jansen D., Neubauer J., Stephan D.:
Investigation of the incompatibilities of cement and superplasticizers and their influence on the rheological behavior
In: Materials 13 (2020), Article No.: 977
ISSN: 1996-1944
DOI: 10.3390/ma13040977

2019

Jakob C., Jansen D., Ukrainczyk N., Koenders E., Pott U., Stephan D., Neubauer J.:
Relating ettringite formation and rheological changes during the initial cement hydration: A comparative study applying XRD analysis, rheological measurements and modeling
In: Materials 12 (2019), Article No.: 2957
ISSN: 1996-1944
DOI: 10.3390/ma12182957
Lu ZC., Haist M., Ivanov D., Jakob C., Jansen D., Leinitz S., Link J., Mechtcherine V., Neubauer J., Plank J., Schmidt W., Schilde C., Schröfl C., Sowoidnich T., Stephan D.:
Characterization data of reference cement CEM I 42.5 R used for priority program DFG SPP 2005 “Opus Fluidum Futurum – Rheology of reactive, multiscale, multiphase construction materials”
In: Data in Brief 27 (2019), Article No.: 104699
ISSN: 2352-3409
DOI: 10.1016/j.dib.2019.104699

Dr. rer. nat Karla Späth

Dissertation

Cu²⁺-dotierte Brushit-Zemente als Knochenersatz: Von Grundlagenforschung bis zu anwendungsspezifischen Eigenschaften

Research focus

Crystallographic analysis of Cu²⁺ doped β-tricalcium phosphate by Rietveld refinement
Influence of doping on the hydration kinetics of brushite cements
Investigation of hydration reaction of brushite cements by quantitative X-ray diffraction (XRD), isothermal heatflow calorimetry and mass spectrometry

Publications

2024

Späth K., Nawaz Q., Schilling T., Götz-Neunhoeffer F., Detsch R., Boccaccini AR., Hurle K.:
New Insights Into Application Relevant Properties of Cu2+-Doped Brushite Cements
In: Journal of Biomedical Materials Research Part B: Applied Biomaterials 112 (2024), Article No.: e35479
ISSN: 1552-4973
DOI: 10.1002/jbm.b.35479

2023

Späth K., Götz-Neunhoeffer F., Hurle K.:
The effect of Cu2+ doping in β-tricalcium phosphate on the hydration mechanism of a brushite cement
In: Materials Today Chemistry 27 (2023), Article No.: 101288
ISSN: 2468-5194
DOI: 10.1016/j.mtchem.2022.101288

2020

Späth K., Götz-Neunhoeffer F., Hurle K.:
Cu2+ doped β-tricalcium phosphate: Solid solution limit and crystallographic characterization by rietveld refinement
In: Journal of Solid State Chemistry 285 (2020), Article No.: 121225
ISSN: 0022-4596
DOI: 10.1016/j.jssc.2020.121225

Dr. rer. nat. Andreas Köhler

Dissertation

Phasenumwandlungen während der Herstellung von Calciumaluminatzement-basierten Feuerfestbetonen

Research focus

Hydration of calcium aluminate cements (CAC) and phase development in dependence of time and temperature
Qualitative and quantitative XRD analysis of CAC mixtures
Investigation of pore solution of CAC with different phase content and filler
Influence of thermal treatment on hydrate phases in CAC

Publications

2023

Köhler A., Rößler C., Neubauer J., Götz-Neunhoeffer F.:
Phase and porosity changes in a calcium aluminate cement and alumina system under hydrothermal conditions
In: Ceramics International (2023)
ISSN: 0272-8842
DOI: 10.1016/j.ceramint.2022.09.353

2022

Goergens J., Köhler A., Götz-Neunhoeffer F.:
Calibration and quantitative analysis of C2AHx (2CaO·Al2O3·xH2O) by Rietveld refinement combined G-factor method
In: Cement and Concrete Research 158 (2022), Article No.: 106854
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2022.106854
Köhler A., Kuiper S., Klaus S., Götz-Neunhoeffer F.:
INVESTIGATION OF DIFFERENT CURING TEMPERATURES ON PHASE CHANGES DURING DRYING OF CASTABLES
17th Unified International Technical Conference on Refractories, UNITECR 2022 (Chicago, IL, 15. March 2022 - 18. March 2022)
In: Unified International Technical Conference on Refractories, UNITECR 2022 - Proceedings 2022
Köhler A., Neubauer J., Götz-Neunhoeffer F.:
How C12A7 influences the early hydration of calcium aluminate cement at different temperatures
In: Cement and Concrete Research 162 (2022), Article No.: 106972
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2022.106972
Köhler A., Neubauer J., Götz-Neunhoeffer F.:
Phase changes during the drying of calcium aluminate cement bond castables – the influence of curing and drying conditions
In: Cement 7 (2022), p. 100020
ISSN: 2666-5492
DOI: 10.1016/j.cement.2021.100020

Dr. rer. nat. Daniel Wagner

Dissertation

Kinetic modeling of alite hydration: Influence of aluminum and alkalis on the hydration kinetics of C₃S

Research focus

Influence of alkalies on C₃S hydration
Investigations on kinetics of C₃S hydration
Impact of Aluminium ions on C₃S hydration

Publications

2023

Wagner D., Bellmann F., Neubauer J.:
Investigations on the effect of alkalis on C-S-H growth rates and their impact on early C3S hydration rates
In: Cement and Concrete Research 173 (2023), Article No.: 107268
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2023.107268

2021

Wagner D., Bellmann F., Neubauer J.:
Impact of KOH on the interfacial precipitation rates of C-S-H during the early hydration of C3S
In: Cement and Concrete Research 146 (2021), Article No.: 106488
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2021.106488

2020

Wagner D., Bellmann F., Neubauer J.:
Influence of aluminium on the hydration of triclinic C3S with addition of KOH solution
In: Cement and Concrete Research 137 (2020), Article No.: 106198
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2020.106198

Dr. rer. nat. Julian Görgens

Dissertation

Hydratation von Calciumaluminatzement in Mischungen mit Calcit: Untersuchungen bei verschiedenen Temperaturen und CA₂/CA-Verhältnissen

Research focus

Hydration of calcium aluminate cements (CAC) in dependence of time and temperature
Role of CaCO₃ during CAC hydration

Publications

2023

Goergens J., Belli R., Schulbert C., Götz-Neunhoeffer F.:
Influence of different CA2/CA-ratios on hydration degree, AH3 content and flexural strength investigated for a binder formulation of calcium aluminate cement with calcite
In: Cement and Concrete Research 165 (2023), Article No.: 107090
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2023.107090

2022

Goergens J., Belli R., Schulbert C., Götz-Neunhoeffer F.:
Effect of varying CA2/CA ratios in Calcium-Aluminate-Calcite-mixtures analysed by combined QXRD, µ-CT and flexural-strength testing
4th International Conference on the Chemistry of Construction Materials - ICCCM 2022 (Karlsruhe, 26. September 2022 - 28. September 2022)
Goergens J., Köhler A., Götz-Neunhoeffer F.:
Calibration and quantitative analysis of C2AHx (2CaO·Al2O3·xH2O) by Rietveld refinement combined G-factor method
In: Cement and Concrete Research 158 (2022), Article No.: 106854
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2022.106854

2021

Goergens J., Götz-Neunhoeffer F.:
Temperature-dependent late hydration of calcium aluminate cement in a mix with calcite – Potential of G-factor quantification combined with GEMS-predicted phase content
In: Cement 5 (2021), Article No.: 100011
ISSN: 2666-5492
DOI: 10.1016/j.cement.2021.100011

2020

Goergens J., Manninger T., Götz-Neunhoeffer F.:
In-situ XRD study of the temperature-dependent early hydration of calcium aluminate cement in a mix with calcite
In: Cement and Concrete Research 136 (2020), Article No.: 106160
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2020.106160

Dr. rer. nat. Julian Wolf

Dissertation

Hydration in the ternary system calcium sulfoaluminate – ordinary Portland cement – calcium sulfate: Kinetics, mechanisms, performance and the impact of Li₂CO₃ addition

Research focus

Investigations on the phase development and kinetics during the hydration of ternary CSA based cement pastes
Thermodynamic modelling of the stable hydrate phases during cement hydration
Impact of additives on the hydration of CSA cements
Interaction of OPC and CSA cements during early hydration

Publications

2023

Pott U., Jakob C., Wolf J., Stephan D.:
Comparison of physical and physicochemical methods for 3D printing application with the focus on the unconfined uniaxial compression test
In: Construction and Building Materials 395 (2023), Article No.: 132260
ISSN: 0950-0618
DOI: 10.1016/j.conbuildmat.2023.132260

2022

Schmidt-Döhl FM., Schulenberg D., Tralow F., Neubauer J., Wolf J., Ectors D.:
QUANTITATIVE ANALYSIS OF THE STRENGTH GENERATING C-S-H-PHASE IN CONCRETE BY IR-SPECTROSCOPY
fib International Conference on Concrete Sustainability 2021, ICCS 2021 (Prague, 8. September 2021 - 10. September 2021)
In: Katerina Sojkova, Petr Hajek, Ctislav Fiala (ed.): Acta Polytechnica CTU Proceedings 2022
DOI: 10.14311/APP.2022.33.0539

2021

Wolf J.:
Hydration in the ternary system calcium sulfoaluminate - ordinary Portland cement - calcium sulfate: Kinetics, mechanisms, performance and the impact of Li2CO3 addition (Dissertation, 2021)
URL: https://opus4.kobv.de/opus4-fau/frontdoor/index/index/docId/17955
Wolf J., Jansen D., Götz-Neunhoeffer F., Neubauer J.:
Relating phase transitions to pore size distributions and mechanical mortar properties in CSA-OPC-C$ based systems – The potential impact of delayed straetlingite formation
In: Cement and Concrete Research 147 (2021), Article No.: 106496
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2021.106496
URL: https://www.sciencedirect.com/science/article/abs/pii/S0008884621001459

2020

Jansen D., Wolf J., Fobbe N.:
The hydration of nearly pure ye'elimite with a sulfate carrier in a stoichiometric ettringite binder system. Implications for the hydration process based on in-situ XRD, 1H-TD-NMR, pore solution analysis, and thermodynamic modeling
In: Cement and Concrete Research 127 (2020), Article No.: 105923
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2019.105923
Wolf J., Jansen D., Götz-Neunhoeffer F., Neubauer J.:
Application of thermodynamic modeling to predict the stable hydrate phase assemblages in ternary CSA-OPC-anhydrite systems and quantitative verification by QXRD
In: Cement and Concrete Research 128 (2020), Article No.: 105956
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2019.105956
Wolf J., Jansen D., Götz-Neunhoeffer F., Neubauer J.:
Impact of varying Li2CO3 additions on the hydration of ternary CSA-OPC-anhydrite mixes
In: Cement and Concrete Research 131 (2020), Article No.: 106015
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2020.106015

2019

Wolf J., Jansen D., Götz-Neunhoeffer F., Neubauer J.:
Mechanisms of early ettringite formation in ternary CSA-OPC-anhydrite systems
In: Advances in Cement Research 31 (2019), p. 195-204
ISSN: 0951-7197
DOI: 10.1680/jadcr.18.00115

Dr. rer. nat. Jörg Nehring

Dissertation

Acceleration of ordinary Portland cement based systems by calcium aluminate cement: New insights into the hydration kinetics of C₃S

Research focus

Investigations on kinetics and rheology of calcium aluminate cement phases during early hydration.
Investigations on kinetics and rheology of OPC phases during early hydration

Publications

2018

Nehring J., Jansen D., Neubauer J., Götz-Neunhoeffer F.:
Hydration of C3S in presence of CA: Mineral-pore solution interaction
In: Journal of the American Ceramic Society 102 (2018), p. 3152-3162
ISSN: 0002-7820
DOI: 10.1111/jace.16197
Nehring J., Naber C., Neubauer J., Götz-Neunhoeffer F.:
Implications for C3S kinetics from combined C3S/CA hydration
In: Journal of the American Ceramic Society 101 (2018), p. 4137-4145
ISSN: 0002-7820
DOI: 10.1111/jace.15537
Nehring J., Neubauer J., Berger S., Götz-Neunhoeffer F.:
Acceleration of OPC by CAC in binary and ternary systems: The role of pore solution chemistry
In: Cement and Concrete Research 107 (2018), p. 264-274
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2018.02.012

Dr. rer. nat. Tanja Manninger

Dissertation

Early hydration of CA and CA-cement in Interaction with calcite and additives

Research focus

Quantitative phase analysis by XRD
Impact of additives on the kinetic of early calcium aluminate cement (CAC) – hydration

Publications

2020

Goergens J., Manninger T., Götz-Neunhoeffer F.:
In-situ XRD study of the temperature-dependent early hydration of calcium aluminate cement in a mix with calcite
In: Cement and Concrete Research 136 (2020), Article No.: 106160
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2020.106160
Manninger T., Jansen D., Neubauer J., Götz-Neunhoeffer F.:
Phase solubility changes during hydration of monocalciumaluminate and calcite-the influence of alkali accumulation
In: Materials 13 (2020), Article No.: 1406
ISSN: 1996-1944
DOI: 10.3390/ma13061406

2019

Manninger T., Jansen D., Neubauer J., Götz-Neunhoeffer F.:
Accelerating effect of Li2CO3 on formation of monocarbonate and Al-hydroxide in a CA-cement and calcite mix during early hydration
In: Cement and Concrete Research 126 (2019), Article No.: 105897
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2019.105897
Manninger T., Jansen D., Neubauer J., Götz-Neunhoeffer F.:
The retarding effect of phosphoric acid during CAC hydration
In: Cement and Concrete Research 122 (2019), p. 83-92
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2019.04.020

Dr. rer. nat. Jürgen Schreiner

Dissertation

Mineralogy of autoclaved aerated concrete and characterization of tobermorite – advanced analytical methods and effect of changes in the chemical composition

Research focus

Investigation of the phase development and crystallinity of phases forming during the production of autoclaved aerated concrete (AAC)
Alternative and low sulfate blends for the manufacture of “green“ AAC
XRD and TGA analysis of lab-scale synthesized tobermorite of different crystallinity

Publications

2022

Lothenbach B., Jansen D., Yan Y., Schreiner J.:
Solubility and characterization of synthesized 11 Å Al-tobermorite
In: Cement and Concrete Research 159 (2022), Article No.: 106871
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2022.106871

2020

Schreiner J., Götz-Neunhoeffer F., Neubauer J., Jansen D.:
Hydrothermal synthesis of 11 Å tobermorite – Effect of adding metakaolin to the basic compound
In: Applied Clay Science 185 (2020), Article No.: 105432
ISSN: 0169-1317
DOI: 10.1016/j.clay.2019.105432

2019

Schreiner J., Goetz-Neunhoeffer F., Neubauer J., Volkmann S., Bergold S., Webler R., Jansen D.:
Advanced Rietveld refinement and SEM analysis of tobermorite in chemically diverse autoclaved aerated concrete
In: Powder Diffraction (2019)
ISSN: 0885-7156
DOI: 10.1017/S0885715619000149
Schreiner J., Götz-Neunhoeffer F., Neubauer J., Bergold S., Webler R., Volkmann S., Jansen D.:
Advanced Rietveld refinement and SEM analysis of tobermorite in chemically diverse autoclaved aerated concrete
In: Powder Diffraction (2019)
ISSN: 0885-7156
DOI: 10.1017/S0885715619000149

2018

Schreiner J., Jansen D., Ectors D., Götz-Neunhoeffer F., Neubauer J., Volkmann S.:
New analytical possibilities for monitoring the phase development during the production of autoclaved aerated concrete
In: Cement and Concrete Research (2018), p. 247-252
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2018.02.028

Dr. rer. nat. Florian Hüller

Dissertation

Hydration mechanisms of CA₂ and alumina-rich calcium aluminate cements: Effects of mechanical activation, critical CA contents and crystallinity of AH₃

Research focus

Hydration of calcium aluminate cements (CAC) in dependence of different factors, such as ambient temperature, particle size, foreign ion doping and additives.
Influence of filler type and fineness on the hydraton of CAC
Experimental methods:
- High temperature synthesis of clinker phases
- Isothermal heat flow calorimetry
- Qualitative and quantitative (Rietveld-) XRD analysis of calcium aluminate cement mixtures
- Determination of particle size and specific surface areas

Publications

2019

Hüller F., Neubauer J., Kaessner S., Götz-Neunhoeffer F.:
Hydration of calcium aluminates at 60°C – Development paths of C2AHx in dependence on the content of free water
In: Journal of the American Ceramic Society (2019)
ISSN: 0002-7820
DOI: 10.1111/jace.16314

2018

Hüller F., Naber C., Neubauer J., Götz-Neunhoeffer F.:
Impact of initial CA dissolution on the hydration mechanism of CAC
In: Cement and Concrete Research 113 (2018), p. 41-54
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2018.06.004

2016

Hüller F., Ectors D., Neubauer J., Götz-Neunhoeffer F.:
Influence of crystallinity and surface area on the hydration kinetics of CA2
In: Cement and Concrete Research 89 (2016), p. 136-144
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2016.08.005

Dr. rer. nat. Christoph Naber

Dissertation

Hydration kinetics of tricalcium silicate: A dataset for reaction rate calculations and nanoscale analysis employing atom probe tomography

Research focus

Hydration kinetics of calcium-silicate and calcium-aluminate cement phases
Direct measurement of the reactivity of supplementary cementitious materials by XRD
Analysis and geochemical modeling of cementitious pore waters.
Thermodynamic modeling of hydrating cement phases
Atom probe tomography of cementitious materials

Publications

2022

Neubauer J., Sowoidnich T., Valentini L., Schulbert C., Naber C., Rößler C., DaSilva J., Bellmann F.:
Evolution of the particle size distribution of tricalcium silicate during hydration by synchrotron X-ray nano-tomography
In: Cement and Concrete Research 156 (2022), Article No.: 106769
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2022.106769

2020

Naber C., Bellmann F., Neubauer J.:
Influence of w/s ratio on alite dissolution and C-S-H precipitation rates during hydration
In: Cement and Concrete Research 134 (2020), Article No.: 106087
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2020.106087
Naber C., Kleiner F., Becker F., Long Nguyen-Tuan ., Roessler C., Etzold MA., Neubauer J.:
C-S-H Pore Size Characterization Via a Combined Nuclear Magnetic Resonance (NMR)-Scanning Electron Microscopy (SEM) Surface Relaxivity Calibration
In: Materials 13 (2020)
ISSN: 1996-1944
DOI: 10.3390/ma13071779

2019

Naber C.:
Hydration kinetics of tricalcium silicate: A dataset for reaction rate calculations and nanoscale analysis employing atom probe tomography (Dissertation, 2019)
URL: https://opus4.kobv.de/opus4-fau/frontdoor/index/index/docId/10335
Naber C., Bellmann F., Sowoidnich T., Götz-Neunhoeffer F., Neubauer J.:
Alite dissolution and C-S-H precipitation rates during hydration
In: Cement and Concrete Research 115 (2019), p. 283-293
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2018.09.001
Naber C., Stegmeyer S., Jansen D., Götz-Neunhoeffer F., Neubauer J.:
The PONKCS method applied for time resolved XRD quantification of supplementary cementitious material reactivity in hydrating mixtures with ordinary Portland cement
In: Construction and Building Materials 214 (2019), p. 449-457
ISSN: 0950-0618
DOI: 10.1016/j.conbuildmat.2019.04.157
Valentini L., Sowoidnich T., da Silva JC., Schulbert C., Naber C., Neubauer J., Bellmann F.:
3D morphological analysis of cement over the first 24 hours of hydration by holographic and near-field ptychographic-tomography
ESRF Coherence Workshop (Grenoble, 9. September 2019 - 13. September 2019)

2018

Hüller F., Naber C., Neubauer J., Götz-Neunhoeffer F.:
Impact of initial CA dissolution on the hydration mechanism of CAC
In: Cement and Concrete Research 113 (2018), p. 41-54
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2018.06.004
Jansen D., Naber C., Ectors D., Lu Z., Kong XM., Götz-Neunhoeffer F., Neubauer J.:
The early hydration of OPC investigated by in-situ XRD, heat flow calorimetry, pore water analysis and 1H NMR: Learning about adsorbed ions from a complete mass balance approach
In: Cement and Concrete Research 109 (2018), p. 230-242
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2018.04.017
Naber C., Sowoidnich T., Bellmann F., Neubauer J., DeRocher KA., Joester D.:
A contribution to the characterization of the silicate-water interface – Part II: Atom Probe Tomography of tricalcium silicate
In: Micron (2018)
ISSN: 0968-4328
DOI: 10.1016/j.micron.2018.06.001
Nehring J., Naber C., Neubauer J., Götz-Neunhoeffer F.:
Implications for C3S kinetics from combined C3S/CA hydration
In: Journal of the American Ceramic Society 101 (2018), p. 4137-4145
ISSN: 0002-7820
DOI: 10.1111/jace.15537
Sowoidnich T., Gordon L., Naber C., Bellmann F., Neubauer J., Joester D.:
A contribution to the characterization of the silicate-water interface – Part I: Implication of a new polished sample hydration technique
In: Micron 112 (2018), p. 63-68
ISSN: 0968-4328
DOI: 10.1016/j.micron.2018.06.004

2016

Naber C., Götz-Neunhoeffer F., Göbbels M., Rößler C., Neubauer J.:
Synthesis of monocrystalline Ca3SiO5 using the optical floating zone method
In: Cement and Concrete Research 85 (2016), p. 156-162
ISSN: 0008-8846
DOI: 10.1016/j.cemconres.2016.04.008

Alumni Mineralogy

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