Cryolite
Ross K C, Mitchell R H, Chakhmouradian A R
Journal of Solid State Chemistry 172 (2003) 95-101
The crystal structure of synthetic simmonsite, Na2LiAlF6
Locality: natural
_database_code_amcsd 0014033
5.4058 5.5926 7.7699 90 90.195 90 P2_1/n
atom     x     y      z Biso
Na2  .5119 .9489  .2488  2.4
Na1      0     0     .5  1.4
Al       0     0      0   .9
F1   .1036 .0442  .2196  1.3
F2   .7257 .1741  .0425  1.9
F3   .1693 .2683 -.0609  1.8