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Discovery of Cl-Bearing Mayenite, Ca_(12)Al_(14)O_(32)Cl_2, a new Mineral in a CV3 Meteorite

Ma, Chi and Sweeney Smith, Stuart A. and Connolly, Harold C., Jr. and Beckett, John R. and Rossman, George R. and Schrader, Devin L. (2010) Discovery of Cl-Bearing Mayenite, Ca_(12)Al_(14)O_(32)Cl_2, a new Mineral in a CV3 Meteorite. Meteoritics and Planetary Science, 45 (S1). A123-A123. ISSN 1086-9379.

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A unique dmitryivanovite (CaAl_2O_4) -dominant Ca-, Al-rich refractory inclusion (CAI), named “Cracked Egg” by [1], was observed in the NWA 1934 CV3 carbonaceous chondrite. During our nano-mineralogy investigation of this CAI, Cl-bearing mayenite, Ca_(12)Al_(14)O_(32)Cl_2, was identified. Electron-microprobe, SEM, electron backscatter diffraction (EBSD), and micro-Raman analyses have been used to characterize its composition and structure. Pyrometamorphic and natural Cl-bearing mayenites have been reported [2, 3] and synthetic Ca_(12)Al_(14)O_(32)Cl_2 is well known [4]. Here, we report the first occurrence of Ca_(12)Al_(14)O_(32)Cl_2 in a meteorite as a new alteration mineral in a CAI.

Item Type:Article
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Ma, Chi0000-0002-1828-7033
Rossman, George R.0000-0002-4571-6884
Additional Information:© 2010 The Meteoritical Society. Article first published online: 15 Jul. 2010.
Issue or Number:S1
Record Number:CaltechAUTHORS:20130304-103710233
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Official Citation:Abstracts for the 73rd Annual Meeting of the Meteoritical Society. Meteoritics & Planetary Science, 45: A5–A227. doi: 10.1111/j.1945-5100.2010.01051.x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37271
Deposited By: Tony Diaz
Deposited On:04 Mar 2013 22:55
Last Modified:09 Mar 2020 13:19

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