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Title: Liebermannite, KAlSi3 O8 , a new shock-metamorphic, high-pressure mineral from the Zagami Martian meteorite

Journal Article · · Meteoritics and Planetary Science
DOI:https://doi.org/10.1111/maps.13000· OSTI ID:1530320

© The Meteoritical Society, 2017. In this paper, we discuss the occurrence of liebermannite (IMA 2013-128), KAlSi3O8, a new, shock-generated, high-pressure tetragonal hollandite-type structure silicate mineral, in the Zagami basaltic shergottite meteorite. Liebermannite crystallizes in space group I4/m with Z = 2, cell dimensions of a = 9.15 ± 0.14 (1σ) Å, c = 2.74 ± 0.13 Å, and a cell volume of 229 ± 19 Å3 (for the type material), as revealed by synchrotron diffraction. In Zagami, liebermannite likely formed via solid-state transformation of primary igneous K-feldspar during an impact event that achieved pressures of ~20 GPa or more. The mineral name is in honor of Robert C. Liebermann, a high-pressure mineral physicist at Stony Brook University, New York, USA.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
AC02-05CH11231
OSTI ID:
1530320
Journal Information:
Meteoritics and Planetary Science, Vol. 53, Issue 1; ISSN 1086-9379
Country of Publication:
United States
Language:
English

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