AM_Apatite-(CaF)_15 Formula: Ca5 P3 O12 F Name: Apatite-(CaF) Unit cell: 9.3845 9.3845 6.8901 90.0 90.0 120.0 , V=525.51 Space group: P63/M (176)

Fleet M E , Pan Y , American Mineralogist , 82 (1997) p.870-877, Site preference of rare earth elements in fluorapatite: Binary (LREE+HREE)-, substituted crystals, Sample: Pr,Er-FAp