AM_Fluorapatite_1 Formula: Ca5 P3 O12.28 F.39 Cl.33 H.28 Name: Fluorapatite Unit cell: 9.4615 9.4615 6.8491 90.0 90.0 120.0 , V=530.99 Space group: P63/M (176)

Hughes J M , Cameron M , Crowley K D , American Mineralogist , 75 (1990) p.295-304, Crystal structures of natural ternary apatites: Solid solution in the, Ca5(PO4)3X (X = F,OH,Cl) system