AM_Apatite-(CaF)_3
Formula: Ca4.641 Na.05 Ce.309 (P2.781 Si.219) O12 F
Name: Apatite-(CaF)
Unit cell: 9.3908 9.3908 6.8988 90.0 90.0 120.0 , V=526.88
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 Kipawa, Quebec