AM_Apatite-(CaF)_21 Formula: (Ca4.417 Sr.583) P3 O12 F Name: Apatite-(CaF) Unit cell: 9.416 9.416 6.924 90.0 90.0 120.0 , V=531.64 Space group: P63/M (176)

Rakovan J F , Hughes J M , The Canadian Mineralogist , 38 (2000) p.839-845, Strontium in the apatite structure: Strontian fluorapatite and belovite-(Ce)