AM_Fluorapatite_11 Formula: (Ca4.52 Na.173 Gd.307) (P2.859 Si.141) O12 F Name: Fluorapatite Unit cell: 9.3853 9.3853 6.8876 90.0 90.0 120.0 , V=525.41 Space group: P63/M (176)

Fleet M E , Pan Y , American Mineralogist , 80 (1995) p.329-335, Site preference of rare earth elements in fluorapatite, Sample: Gd-FAp