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: KNi40
Atomic parameters from ICSD
_database_code_amcsd 0001576
10.0492 17.975 5.2661 90 104.904 90 C2/m
atom     x     y     z occ Biso
Si1  .2757 .0856 .3023      0.4
Si2  .2839 .1698 .8038      0.4
Mg1      0 .0899    .5 .46  0.6
Ni1      0 .0899    .5 .54  0.6
Mg2      0 .1790     0 .73  0.6
Ni2      0 .1790     0 .27  0.6
Mg3      0     0     0 .37  0.6
Ni3      0     0     0 .63  0.6
Na       0  .275    .5  .5  0.9
Ca       0  .275    .5  .5  0.9
K    .0149    .5 .0303  .5  2.3
O1   .1074 .0888 .2082      0.8
O2   .1159 .1713 .7225      0.8
OH3  .1069     0 .7234      0.8
O4   .3568 .2475 .7940      0.8
O5   .3420 .1304 .1028      1.1
O6   .3413 .1152 .6003      1.1
O7   .3287     0 .2999      1.2