Weberite
Knop O, Cameron T S, Jochem K
Journal of Solid State Chemistry 43 (1982) 213-221
What is the true space group of weberite?
Locality: Ivigtut, Greenland
Sample: Imm2 refinement, T = 133 K
_database_code_amcsd 0013480
7.050 9.979 7.297 90 90 90 Imm2
atom     x     y     z U(1,1) U(2,2) U(3,3) U(1,2) U(1,3) U(2,3)
Na1  .2498     0 .4964  .0122  .0130  .0416      0 -.0038      0
Na2      0 .2533 .7479  .0153  .0254  .0135      0      0 -.0062
Mg   .2488     0     0  .0053  .0054  .0089      0  .0002      0
Al       0 .2512 .2491  .0059  .0052  .0090      0      0 -.0005
F1       0     0 .8903  .0046  .0159  .0073      0      0      0
F2       0    .5 .6177  .0070  .0139  .0170      0      0      0
F3       0 .1650 .4752  .0178  .0078  .0065      0      0  .0019
F4       0 .3363 .0239  .0084  .0152  .0151      0      0 -.0015
F5   .1862 .1372 .1845  .0072  .0095  .0182  .0021  .0000 -.0052
F6   .3173 .1377 .8236  .0122  .0104  .0115 -.0024  .0025  .0024