Abstract
End members and species defined with permissible ranges of composition are presented for the true micas, the brittle micas and the interlayer-cation-deficient micas. The determination of the crystallochemical formula for different available chemical data is outlined, and a system of modifiers and suffixes is given to allow the expression of unusual chemical substitutions or polytypic stacking arrangements. Tables of mica synonyms, varieties, ill-defined materials and a list of names formerly or erroneously used for micas are presented. The Mica Subcommittee was appointed by the Commission on New Minerals and Mineral Names (“Commission”) of the International Mineralogical Association (IMA). The definitions and recommendations presented were approved by the Commission.
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Russia; died 1994.
Italy; died 1988.
Australia; resigned 1986.
U.S.A.; died 1984.
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Rieder, M., Cavazzini, G., D’yakonov, Y.S. et al. Nomenclature of the Micas. Clays Clay Miner. 46, 586–595 (1998). https://doi.org/10.1346/CCMN.1998.0460513
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DOI: https://doi.org/10.1346/CCMN.1998.0460513