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Buseckite, (Fe,Zn,Mn)S, a new mineral from the Zaklodzie Meteorite

Chi Ma, John R. Beckett and George R. Rossman
Buseckite, (Fe,Zn,Mn)S, a new mineral from the Zaklodzie Meteorite
American Mineralogist (July 2012) 97 (7): 1226-1233


Buseckite (IMA 2011-070), (Fe,Zn,Mn)S, is the Fe-dominant analog of wurtzite, a new member of the wurtzite group discovered in Zaklodzie, and an ungrouped enstatite-rich achondrite. The type material occurs as single-crystal grains (4-20 mu m in size) in contact with two or more of enstatite, plagioclase, troilite, tridymite, quartz, and sinoite. Low-Ni iron, martensitic iron, schreibersite, keilite, cristobalite, and graphite, which are also present in the type sample, are not observed to be in contact with buseckite. Buseckite is black under diffuse illumination and nearly opaque grayish brown in transmitted light. The mean chemical composition of buseckite, as determined by electron microprobe analysis of the type material, is (wt%) S 35.84, Fe 28.68, Zn 23.54, Mn 10.04, Mg 1.18, sum 99.28, leading to an empirical formula calculated on the basis of 2 atoms of (Fe (sub 0.46) Zn (sub 0.32) Mn (sub 0.16) Mg (sub 0.04) ) (sub Sigma 0.99) S (sub 1.01) . Electron backscatter diffraction patterns of buseckite are a good match to that of synthetic (Zn (sub 0.558) Fe (sub 0.442) )S with the P6 (sub 3) mc structure, showing a=3.8357, c=6.3002 Aa, V=80.27 Aa (super 3) , and Z=2. Buseckite is likely derived from the breakdown of high-temperature pyrrhotite to form troilite and buseckite following the solidification of sulfide-rich liquids produced during impact melting of an enstatite-rich rock.

ISSN: 0003-004X
EISSN: 1945-3027
Serial Title: American Mineralogist
Serial Volume: 97
Serial Issue: 7
Title: Buseckite, (Fe,Zn,Mn)S, a new mineral from the Zaklodzie Meteorite
Affiliation: California Institute of Technology, Division of Geological and Planetary Sciences, Pasadena, CA, United States
Pages: 1226-1233
Published: 201207
Text Language: English
Publisher: Mineralogical Society of America, Washington, DC, United States
References: 45
Accession Number: 2012-067617
Categories: Mineralogy of non-silicatesPetrology of meteorites and tektites
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
N49°00'00" - N54°45'00", E14°15'00" - E24°15'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201235
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