Fluoro-eckermannite Structure Data

Fluoro-eckermannite Structure Data
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Fluoro-eckermannite

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Fluoro-eckermannite
Formula: Si8 Mg5.76 Al.12 Na2.11 O22 F2
Name: Fluoro-eckermannite
Unit cell: 9.668 17.916 5.271 90.0 102.82 90.0 , V=890.24
Space group: C12/M1 (12)

Oberti R , Hawthorne F C , Camara F , Raudsepp M , American Mineralogist , 84 (1999) p.102-111, Unusual M3+ cations in synthetic amphiboles with nominal fluoro-eckermannite, composition: Deviations from stoichiometry and structural effects of the, cummingtonite component, Sample: Al, Na.98Na1.10Mg.90Mg4.88Al.12Si8O22F2

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