AM_Pigeonite_46 Formula: Fe1.008 Mg.871 Ca.121 (Si1.98 Al.02) O6 Name: Pigeonite Unit cell: 9.659 8.877 5.218 90.0 108.09 90.0 , V=425.29 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 = 1.794 GPa