Malladrite
Zalkin A, Forrester J D, Templeton D H
Acta Crystallographica 17 (1964) 1408-1412
The crystal structure of sodium fluorosilicate
Locality: synthetic
_database_code_amcsd 0009291
8.859 8.859 5.038 90 90 120 P321
atom     x     y     z  B(1,1)  B(2,2)  B(3,3)  B(1,2)   B(1,3)   B(2,3)
Na1   .379  .379     0 .010193 .010193 .012805 .003823  .000647 -.000647
Na2  .7143 .7143    .5 .006796 .006796 .024624 .002973 -.000647  .000647
Si1      0     0     0 .005521 .005521 .018714 .002548        0        0
Si2    1/3   2/3 .5062 .004672 .004672 .012805 .002124        0        0
F1   .0870 -.092 .8099 .001529 .011468 .030534 .008919  .005821 -.002587
F2   .4442 -.401 .7007 .006796 .008070 .022654 .005097  .003234  .008408
F3   .2299 -.260 .3098 .008070 .010618 .022654 .005521 -.002587 -.001294