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Buseckite, (Fe,Zn,Mn)S, a new mineral from the Zakłodzie meteorite

Ma, Chi and Beckett, John R. and Rossman, George R. (2012) Buseckite, (Fe,Zn,Mn)S, a new mineral from the Zakłodzie meteorite. American Mineralogist, 97 (7). pp. 1226-1233. ISSN 0003-004X.

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Buseckite (IMA 2011-070), (Fe,Zn,Mn)S, is the Fe-dominant analog of wurtzite, a new member of the wurtzite group discovered in Zakłodzie, and an ungrouped enstatite-rich achondrite. The type material occurs as single-crystal grains (4–20 μm 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_(0.46)Zn_(0.32)Mn_(0.16)Mg_(0.04))_(Σ0.99)S_(1.01). Electron backscatter diffraction patterns of buseckite are a good match to that of synthetic (Zn_(0.558)Fe_(0.442))S with the P6_3mc structure, showing a = 3.8357, c = 6.3002 Å, V = 80.27 Å3, 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.

Item Type:Article
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Ma, Chi0000-0002-1828-7033
Rossman, George R.0000-0002-4571-6884
Additional Information:© 2012 Mineralogical Society of America. Manuscript received January 16, 2012. Manuscript accepted March 17, 2012. Manuscript handled by Fernando Colombo. We thank F. Colombo, M. Kimura, and A.E. Rubin for constructive and helpful reviews. SEM, EBSD, and EPMA analyses were carried out at the Caltech Analytical Facility at the Division of Geological and Planetary Sciences, which is supported, in part, by grant NSF EAR-0318518 and the MRSEC Program of the NSF under DMR-0080065. This research was also partially supported by NASA grant NNX09AG40G (E. Stolper, PI).
Funding AgencyGrant Number
NSF MRSEC ProgramDMR-0080065
Subject Keywords:Buseckite, (Fe,Zn,Mn)S, new mineral, wurtzite group, sinoite, Zakłodzie meteorite, enstatite achondrite
Issue or Number:7
Record Number:CaltechAUTHORS:20120626-141807844
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:32104
Deposited By: Katherine Johnson
Deposited On:28 Jun 2012 20:11
Last Modified:09 Mar 2020 13:19

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