Proposed structures for poorly characterized phases in C2M carbonaceous chondrite meteorites

Mackinnon, Ian D.R. & Zolensky, Michael E. (1984) Proposed structures for poorly characterized phases in C2M carbonaceous chondrite meteorites. Nature, 309(5965), pp. 240-242.

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Abstract

Structure and chemistry of poorly characterized phases (PCP). We suggest here that approximately 10 angstrom PCP, a dominant matrix variety, has a structure equivalent to iron-rich tochilinite [6Fe (sub 0.9) S 5(Fe, Mg) (OH) (sub 2) ] which consists of coherently interstratified mackinawite and brucite sheets. approximately 17 angstrom PCP, previously described as an SBB-type mixed-layer structure, is a commensurate intergrowth of serpentine and tochilinite layers. A wide range of cation substitutions is possible within both tochilinite and serpentine-tochilinite structural types. Various forms of PCP observed in carbonaceous chondrites are intergrowths of tochilinite, serpentine, serpentine-tochilinite and/or valleriite-type minerals.--Modified journal abstract.

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ID Code: 55651
Item Type: Journal Article
Refereed: Yes
Additional Information: GeoRef, Copyright 2009, American Geological Institute.
1984-046648
Keywords: carbonaceous chondrites, crystal structure, intergrowths, meteorites, mineral composition, mixed-layer minerals, oxides, serpentine group, sheet silicates, stony meteorites, sulfides, tochilinite, valleriite
DOI: 10.1038/309240a0
ISSN: 0028-0836
Subjects: Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > GEOLOGY (040300) > Extraterrestrial Geology (040302)
Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > GEOLOGY (040300) > Mineralogy and Crystallography (040306)
Divisions: Current > Institutes > Institute for Future Environments
Deposited On: 30 Jan 2013 23:27
Last Modified: 07 Feb 2013 03:32

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