Fluorbritholite-(Ce)
Oberti R, Ottolini L, Della Ventura G, Parodi G C
American Mineralogist 86 (2001) 1066-1075
On the symmetry and crystal chemistry of britholite:
New structural and microanalytical data
Sample: LOS from Rouma Island, Guinea
_database_code_amcsd 0002670
9.682 9.682 7.066 90 90 120 P6_3
atom     x      y      z occ Biso
Si1  .4007  .3728  .2564 .85  .68
P1   .4007  .3728  .2564 .13  .68
Na1    1/3    2/3 -.0039 .25  .85
Ca1    1/3    2/3 -.0039 .17  .85
La1    1/3    2/3 -.0039 .24  .85
Ce1    1/3    2/3 -.0039 .28  .85
Pr1    1/3    2/3 -.0039 .02  .85
Nd1    1/3    2/3 -.0039 .04  .85
Na1a   2/3    1/3  .0060 .25  .82
Ca1a   2/3    1/3  .0060 .17  .82
La1a   2/3    1/3  .0060 .24  .82
Ce1a   2/3    1/3  .0060 .28  .82
Pr1a   2/3    1/3  .0060 .02  .82
Nd1a   2/3    1/3  .0060 .04  .82
Ca2  .2364 -.0133    .25 .23  .87
La2  .2364 -.0133    .25 .33  .87
Ce2  .2364 -.0133    .25 .37  .87
Pr2  .2364 -.0133    .25 .02  .87
Nd2  .2364 -.0133    .25 .05  .87
O1   .3246  .4868  .2589     1.45
O2   .5929  .4693  .2539     1.78
O3   .3120  .2445  .4174     2.11
O3a  .3650  .2650  .0633     1.35
OH4      0      0  .1771 .12 5.38
F4       0      0  .2359 .88 5.38