Biotite Structure Data

Biotite Structure Data
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Biotite

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Biotite_19
Formula: Si2.764 Al1.428 K.914 Ca.001 Na.022 Mg1.245 Cr.006 Fe1.296 Mn.009 Ti.198 O12
Name: Biotite
Unit cell: 5.323 9.215 10.21 90.0 100.14 90.0 , V=492.99
Space group: C12/M1 (12)

Brigatti M F , Galli E , Poppi L , American Mineralogist , 76 (1991) p.1174-1183, Effect of Ti substitution in biotite-M crystal chemistry, Sample 17 from a quartz diorite, Capo Vaticano, Italy

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