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. Selsurt, Lovozero, Russia
_database_code_amcsd 0006014
9.4456 9.4456 6.9520 90 90 120 P6_3
atom      x       y      z  occ   Uiso
Ca1     2/3     1/3  .0000 .480  .0147
Sr1     2/3     1/3  .0000 .115  .0147
Na1     2/3     1/3  .0000 .290  .0147
Ce1     2/3     1/3  .0000 .110  .0147
La1     2/3     1/3  .0000 .005  .0147
Ca1'    2/3     1/3  .5013 .575  .0114
Na1'    2/3     1/3  .5013 .295  .0114
Ce1'    2/3     1/3  .5013 .110  .0114
Nd1'    2/3     1/3  .5013 .020  .0114
Sr2  .76156  .01185    .25 .492 .01133
Ca2  .76156  .01185    .25 .465 .01133
La2  .76156  .01185    .25 .043 .01133
P    .60116 -.36970  .2522      .00992
O1   .84353  .32851  .2549       .0167
O2   .41362 -.46562  .2537       .0197
O3    .6532  -.2591  .0736       .0206
O3'   .6651  -.2573  .4271       .0244
F         0       0   .248 .958  .0372
OH        0       0   .248 .042  .0372