AM_Pigeonite_56
Formula: (Mg.61 Fe.39) Si O3
Name: Pigeonite
Unit cell: 9.6519 8.9075 5.2004 90.0 108.59 90.0 , V=423.77
Space group: P121/C1 (14)

Angel R J , McCammon C A , Woodland A B , Physics and Chemistry of Minerals , 25 (1998) p.249-258