AM_Pigeonite_47
Formula: Fe1.008 Mg.871 Ca.121 (Si1.98 Al.02) O6
Name: Pigeonite
Unit cell: 9.621 8.827 5.199 90.0 107.82 90.0 , V=420.34
Space group: P121/C1 (14)

Alvaro M , Nestola F , Ballaran T B , Camara F , Domeneghetti M C , Tazzoli V , American Mineralogist , 95 (2010) p.300-311, High-pressure phase transition of a natural pigeonite, Locality: Parana, Brazil, Note: P = 3.167 GPa