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.
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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|Item Type:||Journal Article|
|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|
|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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