Fluoro-eckermannite Structure Data

Fluoro-eckermannite Structure Data
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Fluoro-eckermannite

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Fluoro-eckermannite_4
Formula: Si8 Mg4.12 Cr.98 Na2.91 O22 F2
Name: Fluoro-eckermannite
Unit cell: 9.722 17.813 5.282 90.0 103.69 90.0 , V=888.74
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: Cr1, Na1.00Na1.97Mg.03Mg4.03Cr.97Si8O22F2

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