AM_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