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Refinement of the crystal structures of two "protolithionites"

Zdenek Weiss, Milan Rieder, L'ubomir Smrcok, Vaclav Petricek and Sturges W. Bailey
Refinement of the crystal structures of two "protolithionites"
European Journal of Mineralogy (June 1993) 5 (3): 493-502


The crystals of 'protolithionites' 1M and 3T were refined in the space groups C2/m and P3 (sub 1) 12 with R 3.8 and 3.0%, respectively. The 1M mica has a meso-octahedral cation ordering (two octahedra identical), similar to that of muscovite but with less pronounced differences in size between M1 and M2; Li and Fe (super 2+) prefer M1 to M2 whereas Al does the opposite. Like all 3T structures refined so far, the 'protolithionite' 3T has a hetero-octahedral ordering. The two large (though not identical) octahedra M3, M1 contain all Li and most Fe, while the small (M2) octahedron is occupied by Al. This type of ordering is apparently suitable for a relatively wide range of compositions of Li-Fe micas, excluding the lepidolites and Fe-rich varieties.

ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 5
Serial Issue: 3
Title: Refinement of the crystal structures of two "protolithionites"
Affiliation: Technical University of Mining and Metallurgy, Czechoslovakia
Pages: 493-502
Published: 199306
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 18
Accession Number: 1993-017376
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 9 tables
Secondary Affiliation: Charles University, CSK, CzechoslovakiaSlovak Academy of Sciences, CSK, CzechoslovakiaCzechoslovak Academy of Sciences, CSK, CzechoslovakiaUniversity of Wisconsin, USA, United States
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 1993
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