Richterite
Della Ventura G, Robert J-L, Raudsepp M, Hawthorne F C
American Mineralogist 78 (1993) 633-640
Site occupancies in monoclinic amphiboles: Rietveld structure refinement of
synthetic magnesium cobalt potassium richterite
Sample: KNi100
Atomic parameters from ICSD
_database_code_amcsd 0001579
10.0297 17.942 5.2576 90 104.982 90 C2/m
atom     x     y     z occ Biso
Si1  .2744 .0852 .3027      0.4
Si2  .2849 .1708 .8055      0.4
Ni1      0 .0895    .5      0.6
Ni2      0 .1784     0      0.6
Ni3      0     0     0      0.6
Na       0 .2740    .5  .5  0.9
Ca       0 .2740    .5  .5  0.9
K    .0231    .5 .0380  .5  2.3
O1   .1050 .0889 .2124      0.8
O2   .1169 .1697 .7329      0.8
OH3  .1071     0 .7132      0.8
O4   .3593 .2455 .7855      0.8
O5   .3470 .1333 .1093      1.1
O6   .3375 .1168 .5993      1.1
O7   .3336     0 .3137      1.2