AM_Stanfieldite Formula: Ca8.02 Mg9.98 P12 O48 Name: Stanfieldite Unit cell: 22.841 9.994 17.088 90.0 99.63 90.0 , V=3845.76 Space group: C12/C1 (15)

Dickens B , Brown W E , Tschermaks Mineralogische und Petrographische Mitteilungen , 16 (1971) p.79-104, The crystal structure of Ca7Mg9(Ca,Mg)2(PO4)12, Locality: synthetic