Fluorapatite Comodi P, Liu Y, Zanazzi P F, Montagnoli M Physics and Chemistry of Minerals 28 (2001) 219-224 Structural and vibrational behaviour of fluorapatite with pressure. Part 1: in situ single-crystal X-ray diffraction investigation Sample: P = 3.04 GPa _database_code_amcsd 0008535 9.268 9.268 6.834 90 90 120 P6_3/m atom x y z Uiso Ca1 2/3 1/3 .0008 .0106 Ca2 -.0096 .2396 .25 .0095 P .3681 .3975 .25 .0078 O1 .4838 .3246 .25 .0011 O2 .4675 .5880 .25 .0014 O3 .2562 .3421 .0688 .0171 F 0 0 .25 .031