Fluorapatite Hughes J M, Ertl A, Bernhardt H J, Rossman G R, Rakovan J F American Mineralogist 89 (2004) 629-632 Mn-rich fluorapatite from Autria: Crystal structure, chemical analysis, and spectroscopic investigations _database_code_amcsd 0003527 9.3429 9.3429 6.8110 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 1/3 2/3 -.00256 .72 .0131 .0137 .0137 .0118 .00683 0 0 Mn1 1/3 2/3 -.00256 .28 .0131 .0137 .0137 .0118 .00683 0 0 Ca2 .75861 .75194 .25 .96 .0124 .0139 .0124 .0115 .0069 0 0 Mn2 .75861 .75194 .25 .04 .0124 .0139 .0124 .0115 .0069 0 0 P .60081 .97137 .25 .0095 .0091 .0079 .0117 .0043 0 0 O1 .6690 .15855 .25 .0159 .0202 .0086 .0190 .0074 0 0 O2 .4111 .8767 .25 .0288 .0096 .0138 .062 .0048 0 0 O3 .6591 .91763 .0701 .0274 .0537 .0246 .0156 .0284 .0142 .0066 F 0 0 .25 .0305 .0176 .0176 .056 .0088 0 0