AM_Apatite-(CaF)_4 Formula: Ca4.825 Na.01 Ce.165 (P2.841 Si.159) O12.26 F.74 H.26 Name: Apatite-(CaF) Unit cell: 9.3995 9.3995 6.8941 90.0 90.0 120.0 , V=527.49 Space group: P63/M (176)

Hughes J M , Cameron M , Mariano A N , American Mineralogist , 76 (1991) p.1165-1173, Rare-earth-element ordering and structural variations in natural, rare-earth-bearing apatites, sample from the Oka carbonatite