AM_Glaucophane
Formula:
Mg2.39 Fe.79 Al1.82 (Na1.96 Ca.04) Si8 O24 H2
Name:
Glaucophane
Unit cell:
9.541 17.74 5.295 90.0 103.67 90.0 , V=870.83
Space group:
C12/M1 (12)
Papike J J , Clark J R , American Mineralogist , 53 (1968) p.1156-1173, The crystal structure and cation distribution of glaucophane