AM_Biotite_15
Formula:
Si2.868 Al1.282 K.955 Ca.013 Na.03 Mg1.899 Cr.072 Fe.504 Mn.027 Ti.324 O12
Name:
Biotite
Unit cell:
5.315 9.204 10.168 90.0 100.13 90.0 , V=489.66
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 11 from a lamproite rock, Jummilla, Spain