Apatite-(CaF)
Hughes J M, Cameron M, Crowley K D
American Mineralogist 76 (1991) 1857-1862
Ordering of divalent cations in the apatite structure: Crystal structure
refinements of natural Mn- and Sr-bearing apatite
sample Sr.29
_database_code_amcsd 0001426
9.3786 9.3786 6.8922 90 90 120 P6_3/m
atom       x      y      z  occ Biso
Ca1      2/3    1/3 .00092 .998 .732
Sr1      2/3    1/3 .00092 .002 .732
Ca2  -.00788 .24114    .25 .952 .670
Sr2  -.00788 .24114    .25 .048 .670
P     .36899 .39827    .25       .51
O1     .4852  .3272    .25       .90
O2     .4670  .5879    .25       .98
O3    .25737  .3418  .0706      1.16
F          0      0    .25 .890 1.93