Fluorcaphite
Chakhmouradian A R, Hughes J M, Rakovan J F
The Canadian Mineralogist 43 (2005) 735-746
Fluorcaphite, a second occurrence and detailed structural analysis:
Simultaneous accommodation of Ca, Sr, Na, LREE in the apatite atomic arrangement
Sample: Mt. Koashva, Khibina complex, Kola Peninsula, northwestern Russia
_database_code_amcsd 0006015
9.4853 9.4853 6.9862 90 90 120 P6_3
atom      x       y      z  occ   Uiso
Ca1     2/3     1/3 -.0017 .585  .0148
Sr1     2/3     1/3 -.0017 .210  .0148
Na1     2/3     1/3 -.0017 .195  .0148
La1     2/3     1/3 -.0017 .010  .0148
Ca1'    2/3     1/3  .5013 .880  .0124
Ce1'    2/3     1/3  .5013 .065  .0124
Nd1'    2/3     1/3  .5013 .015  .0124
Pr1'    2/3     1/3  .5013 .040  .0124
Sr2  .76099  .01279    .25 .278 .01182
Ca2  .76099  .01279    .25 .610 .01182
La2  .76099  .01279    .25 .055 .01182
Ce2  .76099  .01279    .25 .040 .01182
Nd2  .76099  .01279    .25 .017 .01182
P    .60118 -.36967  .2522       .0102
O1    .8441   .3286  .2561       .0176
O2    .4143  -.4654  .2493       .0221
O3    .6518  -.2608  .0726        .020
O3'   .6665  -.2556  .4250        .030
F         0       0   .246 .749   .052
OH        0       0   .246 .251   .052