Fluorapatite Luo Y, Hughes J M, Rakovan J, Pan Y American Mineralogist 94 (2009) 345-351 Site preference of U and Th in Cl, F, and Sr apatites Locality: synthetic Note: UFAP _database_code_amcsd 0004837 9.3709 9.3709 6.8849 90 90 120 P6_3/m atom x y z occ Uiso U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3) Ca1 2/3 1/3 .00103 .999 .0106 .0121 .0121 .0074 .0060 0 0 Ca2 .75983 .00774 1/4 .986 .0095 .0113 .0091 .0087 .0054 0 0 U2 .75983 .00774 1/4 .014 .0095 .0113 .0091 .0087 .0054 0 0 P .60199 .63110 1/4 .0069 .0074 .0065 .0070 .0037 0 0 O1 .6747 .5161 1/4 .0116 .0144 .0110 .0130 .0092 0 0 O2 .41220 .53290 1/4 .0132 .0081 .0103 .0198 .0034 0 0 O3 .65863 .74315 .0706 .0153 .0250 .0137 .0105 .0120 .0077 .0046 F 0 0 1/4 .0220 .0125 .0125 .0409 .0063 0 0