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Zolenskyite, FeCr (sub 2) S (sub 4) , a new sulfide mineral from the Indarch Meteorite

Chi Ma and Alan E. Rubin
Zolenskyite, FeCr (sub 2) S (sub 4) , a new sulfide mineral from the Indarch Meteorite
American Mineralogist (June 2022) 107 (6): 1030-1033

Abstract

Zolenskyite (IMA 2020-070), FeCr (sub 2) S (sub 4) , is a new sulfide mineral that occurs within troilite, with clinoenstatite and tridymite, in the matrix of the Indarch meteorite, an EH4 enstatite chondrite. The mean chemical composition of zolenskyite determined by electron probe microanalysis, is (wt%) S 43.85, Cr 35.53, Fe 18.94, Mn 0.68, Ca 0.13, total 99.13, yielding an empirical formula of Fe (sub 0.99) Mn (sub 0.04) Ca (sub 0.01) Cr (sub 1.99) S (sub 3.98) . The ideal formula is FeC (sub r) 2S (sub 4) . Electron backscatter diffraction shows that zolenskyite has the C2/m CrNb (sub 2) Se (sub 4) -Cr (sub 3) S (sub 4) -type structure of synthetic FeCr (sub 2) S (sub 4) , which has a=12.84(1) Aa, b=3.44(1) Aa, c=5.94(1) Aa, beta =117(1) degrees , V = 234(6) Aa (super 3) , and Z=2. The calculated density using the measured composition is 4.09 g/cm (super 3) . Zolenskyite is a monoclinic polymorph of daubreelite. It may be a high-pressure phase, formed from daubreelite at high pressures (several gigapascals) and moderate temperatures in highly shocked regions of the EH parent asteroid before becoming incorporated into Indarch via impact mixing. Zolenskyite survived moderate annealing of the Indarch whole-rock. The new mineral is named in honor of Michael E. Zolensky, an esteemed cosmochemist and mineralo-gist at NASA's Johnson Space Center, for his contributions to research on extraterrestrial materials, including enstatite chondrites.


ISSN: 0003-004X
EISSN: 1945-3027
Coden: AMMIAY
Serial Title: American Mineralogist
Serial Volume: 107
Serial Issue: 6
Title: Zolenskyite, FeCr (sub 2) S (sub 4) , a new sulfide mineral from the Indarch Meteorite
Affiliation: California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States
Pages: 1030-1033
Published: 202206
Text Language: English
Publisher: Mineralogical Society of America, Washington, DC, United States
References: 27
Accession Number: 2022-033427
Categories: Mineralogy of non-silicatesPetrology of meteorites and tektites
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
Secondary Affiliation: University of California Los Angeles, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2022, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 202212
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