Carbonate-hydroxylapatite Fleet M E, Liu X, King P L American Mineralogist 89 (2004) 1422-1432 Accommodation of the carbonate ion in apatite: An FTIR and X-ray structure study of crystals synthesized at 2-4 GPa Sample: xt371 _database_code_amcsd 0003646 9.4803 9.4803 6.8853 90 90 120 P6_3/m atom x y z occ Uiso Ca1 2/3 1/3 .0021 .0179 Ca2 .99093 .24944 .25 .0222 P .3708 .4014 .25 .943 .0160 O1 .4847 .3313 .25 .0198 O2 .4657 .5856 .25 .0368 O3 .2608 .3459 .0723 .971 .0430 O4 0 0 .25 .36 .025 C 0 0 0 .26 .025 OA11 .028 .998 .662 .105 .025 OA12 .953 .123 .536 .049 .025 OA2 .911 .015 .461 .062 .025 OB3 .359 .435 .472 .034 .025