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: KNi20
Atomic parameters from ICSD
_database_code_amcsd 0001575
10.0536 17.982 5.2702 90 104.879 90 C2/m
atom     x     y     z occ Biso
Si1  .2761 .0849  .303      0.4
Si2  .2844 .1715 .8034      0.4
Mg1      0 .0901    .5 .72  0.6
Ni1      0 .0901    .5 .28  0.6
Mg2      0 .1790     0  .9  0.6
Ni2      0 .1790     0  .1  0.6
Mg3      0     0     0 .62  0.6
Ni3      0     0     0 .38  0.6
Na       0 .2763    .5  .5  0.9
Ca       0 .2763    .5  .5  0.9
K    .0183    .5 .0378  .5  2.3
O1   .1101 .0888 .2154      0.8
O2   .1146 .1727 .7238      0.8
OH3  .1067     0 .7095      0.8
O4   .3572 .2502 .7801      0.8
O5   .3417 .1316 .0951      1.1
O6   .3377 .1170 .5987      1.1
O7   .3297     0 .3095      1.2