Biotite Structure Data

Biotite Structure Data
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Biotite

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Biotite_16
Formula: Si2.904 Al1.135 (K.947 Ca.002 Na.051) Mg2.088 Cr.054 Fe.498 Mn.018 Ti.267 O12
Name: Biotite
Unit cell: 5.314 9.19 10.16 90.0 100.18 90.0 , V=488.36
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 12 from a lamproite rock, Jummilla, Spain

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