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Stöfflerite, (Ca,Na)(Si,Al)₄O₈ in the hollandite structure: A new high-pressure polymorph of anorthite from martian meteorite NWA 856

Tschauner, Oliver and Ma, Chi and Spray, John G. and Greenberg, Eran and Prakapenka, Vitali B. (2021) Stöfflerite, (Ca,Na)(Si,Al)₄O₈ in the hollandite structure: A new high-pressure polymorph of anorthite from martian meteorite NWA 856. American Mineralogist, 106 (4). pp. 650-655. ISSN 0003-004X. doi:10.2138/am-2021-7563. https://resolver.caltech.edu/CaltechAUTHORS:20210406-073652948

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Abstract

We present the crystal structure, composition, and occurrence of stöfflerite, the naturally occurring Ca-aluminosilicate with hollandite-type structure. Stöfflerite is a high-pressure polymorph of anorthite and an approved mineral. The type material was found in the shergottitic martian meteorite Northwest Africa 856. Type stöfflerite (Sto₆₀Lin₄₀) assumes space group I4/m with unit-cell dimensions a = 9.255(1) Å, c = 2.742(3) Å, V = 235.1(2) ų, and Z = 2.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.2138/am-2021-7563DOIArticle
ORCID:
AuthorORCID
Tschauner, Oliver0000-0003-3364-8906
Ma, Chi0000-0002-1828-7033
Greenberg, Eran0000-0002-1630-0628
Prakapenka, Vitali B.0000-0001-9270-2330
Alternate Title:Stöfflerite, (Ca,Na)(Si,Al)4O8 in the hollandite structure: A new high-pressure polymorph of anorthite from martian meteorite NWA 856
Additional Information:© 2021 Mineralogical Society of America. Manuscript received April 13, 2020; Manuscript accepted August 26, 2020; Manuscript handled by Bin Chen. Part of this work was supported by DE-FG02-94ER14466, DE-NA0001974, NSF Grants EAR-1634415, EAR-1128-799, EAR-1322082. The Advanced Photon Source, a DOE Office of Science User Facility is operated by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. The Advanced Light Source is supported through Contract No. DE-AC02-05CH11231. SEM and EPMA measurements were carried out at the Geological and Planetary Science Division Analytical Facility at Caltech, supported in part by NSF grants EAR-0318518, EAR-1322082, and DMR-0080065. O.T. acknowledges the support from DOE Cooperative Agreement DE-NA0001982. J.G.S. acknowledges support from NSERC Canada, the Canada Foundation for Innovation, and the New Brunswick Innovation Foundation. We thank the reviewers Erin Walton, Martin Kunz, and Ross Angel for their helpful comments.
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-94ER14466
Department of Energy (DOE)DE-NA0001974
NSFEAR-1634415
NSFEAR-1128799
NSFEAR-1322082
Department of Energy (DOE)DE-AC02-06CH11357
Department of Energy (DOE)DE-AC02-05CH11231
NSFEAR-0318518
NSFEAR-1322082
NSFDMR-0080065
Department of Energy (DOE)DE-NA0001982
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Canada Foundation for InnovationUNSPECIFIED
New Brunswick Innovation FoundationUNSPECIFIED
Subject Keywords:High pressure, new mineral, hollandite, shock compression
Issue or Number:4
DOI:10.2138/am-2021-7563
Record Number:CaltechAUTHORS:20210406-073652948
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20210406-073652948
Official Citation:Oliver Tschauner, Chi Ma, John G. Spray, Eran Greenberg, Vitali B. Prakapenka; Stöfflerite, (Ca,Na)(Si,Al)4O8 in the hollandite structure: A new high-pressure polymorph of anorthite from martian meteorite NWA 856. American Mineralogist 2021; 106 (4): 650–655. doi: https://doi.org/10.2138/am-2021-7563
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108624
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:08 Apr 2021 22:05
Last Modified:08 Apr 2021 22:05

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