Cryolite
Hawthorne F C, Ferguson R B
The Canadian Mineralogist 13 (1975) 377-382
Refinement of the crystal structure of cryolite
_database_code_amcsd 0005118
5.4024 5.5959 7.7564 90 90.278 90 P2_1/n
atom      x      y      z B(1,1) B(2,2) B(3,3)  B(1,2)  B(1,3)  B(2,3)
Al        0      0      0 .00558 .00521 .00286       0  .00002       0
Na1       0      0     .5 .00919 .00855 .00448       0 -.00025       0
Na2   .5133 -.0519  .2474 .01234 .01114 .00758 -.00175  .00002  .00015
F1    .1026  .0455  .2194 .01306 .01275 .00339  .00036 -.00162 -.00077
F2   -.2732  .1737  .0462 .00935 .01091 .00647  .00438  .00177  .00083
F3    .1634  .2690 -.0630 .01139 .00847 .00737 -.00335 -.00063  .00239