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Journal Article

The high-pressure, vacancy-stabilized component in clinopyroxenes

Ioannis Baziotis, Chi Ma, Stephan Klemme, Jasper Berndt, Oliver Tschauner, Paul D. Asimow
Published: 04 February 2025
American Mineralogist (2025)
DOI: https://doi.org/10.2138/am-2024-9609
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Journal Article

A high-pressure, clinopyroxene-structured polymorph of albite in highly shocked terrestrial and meteoritic rocks

Chi Ma, Oliver Tschauner, Mihye Kong, John R. Beckett, Eran Greenberg, Vitali B. Prakapenka, Yongjae Lee
Published: 01 April 2022
American Mineralogist (2022) 107 (4): 625–630.
DOI: https://doi.org/10.2138/am-2021-7925
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View PDF for article title, A high-pressure, clinopyroxene-structured polymorph of albite in highly shocked terrestrial and meteoritic rocks
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Journal Article

Dissolution Rates of Allophane With Variable Fe Contents: Implications for Aqueous Alteration and the Preservation of X-Ray Amorphous Materials on Mars

S. J. Ralston, Elisabeth M. Hausrath, Oliver Tschauner, Elizabeth Rampe, Tanya S. Peretyazhko, Roy Christoffersen, Chris Defelice, Hyejeong Lee
Published: 01 April 2021
Clays and Clay Minerals (2021) 69 (2): 263–288.
DOI: https://doi.org/10.1007/s42860-021-00124-x
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View PDF for article title, Dissolution Rates of Allophane With Variable Fe Contents: Implications for Aqueous Alteration and the Preservation of X-Ray Amorphous Materials on Mars
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Journal Article

Stöfflerite, (Ca,Na)(Si,Al) 4 O 8 in the hollandite structure: A new high-pressure polymorph of anorthite from martian meteorite NWA 856

Oliver Tschauner, Chi Ma, John G. Spray, Eran Greenberg, Vitali B. Prakapenka
Published: 01 April 2021
American Mineralogist (2021) 106 (4): 650–655.
DOI: https://doi.org/10.2138/am-2021-7563
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View PDF for article title, Stöfflerite, (Ca,Na)(Si,Al) 4 O 8 in the hollandite structure: A new high-pressure polymorph of anorthite from martian meteorite NWA 856
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Journal Article

High-pressure minerals

Oliver Tschauner
Published: 01 December 2019
American Mineralogist (2019) 104 (12): 1701–1731.
DOI: https://doi.org/10.2138/am-2019-6594
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Journal Article

Chenmingite, FeCr 2 O 4 in the CaFe 2 O 4 -type structure, a shock-induced, high-pressure mineral in the Tissint martian meteorite

Chi Ma, Oliver Tschauner, John R. Beckett, Yang Liu, Eran Greenberg, Vitali B. Prakapenka
Published: 01 October 2019
American Mineralogist (2019) 104 (10): 1521–1525.
DOI: https://doi.org/10.2138/am-2019-6999
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View PDF for article title, Chenmingite, FeCr 2 O 4 in the CaFe 2 O 4 -type structure, a shock-induced, high-pressure mineral in the Tissint martian meteorite
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Journal Article

Craters of the Moon National Monument basalts as unshocked compositional and weathering analogs for martian rocks and meteorites

Christopher T. Adcock, Arya Udry, Elisabeth M. Hausrath, Oliver Tschauner
Published: 01 April 2018
American Mineralogist (2018) 103 (4): 502–516.
DOI: https://doi.org/10.2138/am-2018-6193
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View PDF for article title, Craters of the Moon National Monument basalts as unshocked compositional and weathering analogs for martian rocks and meteorites
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Journal Article

Incorporation of high amounts of Na in ringwoodite: Possible implications for transport of alkali into lower mantle

Luca Bindi, Anastasia Tamarova, Andrey V. Bobrov, Ekaterina A. Sirotkina, Oliver Tschauner, Michael J. Walter, Tetsuo Irifune
Published: 01 February 2016
American Mineralogist (2016) 101 (2): 483–486.
DOI: https://doi.org/10.2138/am-2016-5570
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View PDF for article title, Incorporation of high amounts of Na in ringwoodite: Possible implications for transport of alkali into lower mantle
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Journal Article

The mobility of Nb in rutile-saturated NaCl- and NaF-bearing aqueous fluids from 1–6.5 GPa and 300–800 °C

Elizabeth A. Tanis, Adam Simon, Oliver Tschauner, Paul Chow, Yuming Xiao, Pamela Burnley, Christopher J. Cline, II, John M. Hanchar, Thomas Pettke, Guoyin Shen, Yusheng Zhao
Published: 01 July 2015
American Mineralogist (2015) 100 (7): 1600–1609.
DOI: https://doi.org/10.2138/am-2015-5031
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View PDF for article title, The mobility of Nb in rutile-saturated NaCl- and NaF-bearing aqueous fluids from 1–6.5 GPa and 300–800 °C
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Journal Article

Dissolution rates of amorphous Al- and Fe-phosphates and their relevance to phosphate mobility on Mars

Valerie M. Tu, Elisabeth M. Hausrath, Oliver Tschauner, Valentin Iota, Gerald W. Egeland
Published: 01 July 2014
American Mineralogist (2014) 99 (7): 1206–1215.
DOI: https://doi.org/10.2138/am.2014.4613
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View PDF for article title, Dissolution rates of amorphous Al- and Fe-phosphates and their relevance to phosphate mobility on Mars
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Journal Article

Synthesis and characterization of the Mars-relevant phosphate minerals Fe- and Mg-whitlockite and merrillite and a possible mechanism that maintains charge balance during whitlockite to merrillite transformation

Christopher T. Adcock, Elisabeth M. Hausrath, Paul M. Forster, Oliver Tschauner, Kirellos J. Sefein
Published: 01 July 2014
American Mineralogist (2014) 99 (7): 1221–1232.
DOI: https://doi.org/10.2138/am.2014.4688
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View PDF for article title, Synthesis and characterization of the Mars-relevant phosphate minerals Fe- and Mg-whitlockite and merrillite and a possible mechanism that maintains charge balance during whitlockite to merrillite transformation
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Journal Article

Kangite, (Sc,Ti,Al,Zr,Mg,Ca,□) 2 O 3 , a new ultra-refractory scandia mineral from the Allende meteorite: Synchrotron micro-Laue diffraction and electron backscatter diffraction

Chi Ma, Oliver Tschauner, John R. Beckett, George R. Rossman, Wenjun Liu
Published: 01 May 2013
American Mineralogist (2013) 98 (5-6): 870–878.
DOI: https://doi.org/10.2138/am.2013.4290
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View PDF for article title, Kangite, (Sc,Ti,Al,Zr,Mg,Ca,□) 2 O 3 , a new ultra-refractory scandia mineral from the Allende meteorite: Synchrotron micro-Laue diffraction and electron backscatter diffraction
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Journal Article

Solubility of xenotime in a 2 M HCl aqueous fluid from 1.2 to 2.6 GPa and 300 to 500 °C

Elizabeth A. Tanis, Adam Simon, Oliver Tschauner, Paul Chow, Yuming Xiao, Gouyin Shen, John M. Hanchar, Mark Frank
Published: 01 October 2012
American Mineralogist (2012) 97 (10): 1708–1713.
DOI: https://doi.org/10.2138/am.2012.4009
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View PDF for article title, Solubility of xenotime in a 2 M HCl aqueous fluid from 1.2 to 2.6 GPa and 300 to 500 °C
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Journal Article

Panguite, (Ti 4+ ,Sc,Al,Mg,Zr,Ca) 1.8 O 3 , a new ultra-refractory titania mineral from the Allende meteorite: Synchrotron micro-diffraction and EBSD

Chi Ma, Oliver Tschauner, John R. Beckett, George R. Rossman, Wenjun Liu
Published: 01 July 2012
American Mineralogist (2012) 97 (7): 1219–1225.
DOI: https://doi.org/10.2138/am.2012.4027
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View PDF for article title, Panguite, (Ti 4+ ,Sc,Al,Mg,Zr,Ca) 1.8 O 3 , a new ultra-refractory titania mineral from the Allende meteorite: Synchrotron micro-diffraction and EBSD
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Journal Article

Brearleyite, Ca 12 Al 14 O 32 Cl 2 , a new alteration mineral from the NWA 1934 meteorite

Chi Ma, Harold C. Connolly, Jr., John R. Beckett, Oliver Tschauner, George R. Rossman, Anthony R. Kampf, Thomas J. Zega, Stuart A. Sweeney Smith, Devin L. Schrader
Published: 01 August 2011
American Mineralogist (2011) 96 (8-9): 1199–1206.
DOI: https://doi.org/10.2138/am.2011.3755
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View PDF for article title, Brearleyite, Ca 12 Al 14 O 32 Cl 2 , a new alteration mineral from the NWA 1934 meteorite
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Journal Article

Possible structural polymorphism in Al-bearing magnesiumsilicate post-perovskite

Oliver Tschauner, Boris Kiefer, Haozhe Liu, Stanislas Sinogeikin, Maddury Somayazulu, Sheng-Nian Luo
Published: 01 April 2008
American Mineralogist (2008) 93 (4): 533–539.
DOI: https://doi.org/10.2138/am.2008.2372
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View PDF for article title, Possible structural polymorphism in Al-bearing magnesiumsilicate post-perovskite
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Journal Article

Recovery of stishovite-structure at ambient conditions out of shock-generated amorphous silica

Oliver Tschauner, Sheng-Nian Luo, Paul D. Asimow, Thomas J. Ahrens
Published: 01 November 2006
American Mineralogist (2006) 91 (11-12): 1857–1862.
DOI: https://doi.org/10.2138/am.2006.2015
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View PDF for article title, Recovery of stishovite-structure at ambient conditions out of shock-generated amorphous silica
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Journal Article

A new dense silica polymorph: A possible link between tetrahedrally and octahedrally coordinated silica

Sheng-Nian Luo, Oliver Tschauner, Paul D. Asimow, Thomas J. Ahrens
Published: 01 February 2004
American Mineralogist (2004) 89 (2-3): 455–461.
DOI: https://doi.org/10.2138/am-2004-2-327
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