Charles A. Geiger

University of Vienna — Austria

Materials Science · Physical Sciences

38h-index5.0kcitations200works0.02yr avg
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Research Topics

Crystal Structures and Properties(90), High-pressure geophysics and materials(60), Glass properties and applications(52), Mineralogy and Gemology Studies(36), Geological and Geochemical Analysis(35)

Publications200 total

An UV/Vis/NIR optical absorption spectroscopic and color investigation of transition-metal-doped gahnite (ZnAl2O4 spinel) crystals grown by the flux method
American Mineralogist·2023· 1 cited
Single-crystal UV/Vis absorption spectroscopy of aluminosilicate garnet: Part III. {Fe2+} + [Fe3+] → {Fe3+} + [Fe2+] intervalence charge transfer
American Mineralogist·2022· 6 cited
Nitrogen Incorporation in Potassic and Micro- and Meso-Porous Minerals: Potential Biogeochemical Records and Targets for Mars Sampling
Astrobiology·2022· 2 citedOpen Access
UV/Vis single-crystal spectroscopic investigation of almandine-pyrope and almandinespessartine solid solutions: Part I. Spin-forbidden Fe2+,3+ and Mn2+ electronic-transition energies, crystal chemistry, and bonding behavior
American Mineralogist·2022· 2 cited
Single-crystal UV/Vis optical absorption spectra of almandine-bearing and spessartine garnet: Part II. An analysis of the spin-forbidden bands of Fe2+, Mn2+, and Fe3+
American Mineralogist·2022· 4 cited
History of the Mineral Sciences: Crystals and their Role in the Development of Atomic Theory
Goldschmidt2021 abstracts·2021Open Access
A New Paradigm for “Water” in Garnet: Micro- & Nano-Size Hydrogarnet Clusters
Goldschmidt2021 abstracts·2021Open Access
Are the thermodynamic properties of natural and synthetic Mg2SiO4-Fe2SiO4 olivines the same?
American Mineralogist·2020· 6 citedOpen Access
A calorimetric and thermodynamic investigation of Cs6[(UO2)2(MoO4)3(MoO5)] and calculated phase behaviour in the system (Cs2MoO4 + UO3 + H2O)
The Journal of Chemical Thermodynamics·2020· 1 cited
Micro- and nano-size hydrogrossular-like clusters in pyrope crystals from ultra-high-pressure rocks of the Dora-Maira Massif, western Alps
Contributions to Mineralogy and Petrology·2020· 5 citedOpen Access
Micro- and nano-size hydrogarnet clusters in calcium silicate garnet: Part II. Mineralogical, petrological, and geochemical aspects
American Mineralogist·2019· 10 citedOpen Access
Micro- and nano-size hydrogarnet clusters and proton ordering in calcium silicate garnet: Part I. The quest to understand the nature of “water” in garnet continues
American Mineralogist·2019· 22 citedOpen Access
JOG volume 65 issue 253 Cover and Front matter
Journal of Glaciology·2019Open Access
JOG volume 65 issue 252 Cover and Front matter
Journal of Glaciology·2019Open Access
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The Journal of Chemical Thermodynamics·2019· 2 cited
A calorimetric and thermodynamic investigation of cesium uranyl tungstate Cs8[(UO2)4(WO4)4(WO5)2]
The Journal of Chemical Thermodynamics·2019· 4 cited
An analysis of the magnetic behavior of olivine and garnet substitutional solid solutions
American Mineralogist·2019· 8 citedOpen Access
Could the effect of order-disorder in garnet be important for upper mantle petrology?
International Kimberlite Conference Extended Abstracts: 1998·2019· 1 citedOpen Access
Thermodynamic behaviour of grossular–andradite, Ca3(AlxFe3+1-x)2Si3O12, garnets: a calorimetric study
European Journal of Mineralogy·2019· 9 cited
JOG volume 64 issue 248 Cover and Front matter
Journal of Glaciology·2018· 1 citedOpen Access
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Frequent Co-authors

Thomas Armbruster(8), Boris A. Kolesov(8), Anne Bosenick(6), Georg Amthauer(5), Daniel Rettenwander(4), G. A. Lager(3), George R. Rossman(3), Simona Quartieri(3), Gilberto Artioli(2), Martina Tribus(2), Peter Tropper(2), O. J. Kleppa(2), Klaus Langer(2), B. Winkler(2), Martin T. Dove(2), Edgar Dachs(2), G. Antonioli(2), Evgeny V. Alekseev(1), B. Lazić(1), Martin Fisch(1)