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: xt373 _database_code_amcsd 0003647 9.4817 9.4817 6.8843 90 90 120 P6_3/m atom x y z occ Uiso Ca1 2/3 1/3 .00210 .0175 Ca2 .99095 .24961 .25 .0214 P .3709 .4014 .25 .941 .0150 O1 .4847 .3310 .25 .0190 O2 .4658 .5855 .25 .0356 O3 .2605 .3460 .0727 .971 .0412 O4 0 0 .25 .122 .025 C 0 0 0 .22 .025 OA11 .023 .000 .661 .098 .025 OA12 .946 .123 .525 .057 .025 OA2 .925 .021 .455 .065 .025 OB3 .348 .421 .477 .041 .025