Biotite Structure Data

Biotite Structure Data
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Biotite

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Biotite_13
Formula: (Si2.908 Al1.092) K.952 Ca.006 Na.024 Mg2.424 Cr.024 Fe.282 Mn.015 Ti.177 O12
Name: Biotite
Unit cell: 5.306 9.19 10.163 90.0 100.11 90.0 , V=487.87
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 9 from a lamproite rock, Cancarix, Spain

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