AM_Chopinite
Formula: (Mg2.268 Fe.732) P2 O8
Name: Chopinite
Unit cell: 5.9305 4.7583 10.2566 90.0 90.663 90.0 , V=289.41
Space group: P121/C1 (14)

Grew E S , Armbruster T , Medenbach O , Yates M G , Carson C J , European Journal of Mineralogy , 19 (2007) p.229-245