Biotite Structure Data

Biotite Structure Data
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Biotite

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Biotite_22
Formula: Si2.72 Al1.62 Fe1.5 Mg.76 Ti.22 (Na.04 K.96) O11.96 F.04 H.36
Name: Biotite
Unit cell: 5.352 9.268 10.255 90.0 100.27 90.0 , V=500.52
Space group: C12/M1 (12)

Brigatti M F , Frigieri P , Ghezzo c , Poppi L , American Mineralogist , 85 (2000) p.436-448, Crystal chemistry of Al-rich biotites coexisting with muscovites in, peraluminous granites, Sample: A4

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