AM_Pigeonite
Formula:
Mg.78 Fe1.04 Ca.18 Si2 O6
Name:
Pigeonite
Unit cell:
9.706 8.95 5.246 90.0 108.59 90.0 , V=431.94
Space group:
P121/C1 (14)
Morimoto N , Guven N , American Mineralogist , 55 (1970) p.1195-1209, Refinement of the crystal structure of pigeonite