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: KNi60
Atomic parameters from ICSD
_database_code_amcsd 0001577
10.0436 17.962 5.2633 90 104.936 90 C2/m
atom     x     y     z occ Biso
Si1  .2747 .0855 .3048      0.4
Si2  .2853 .1699 .8048      0.4
Mg1      0 .0895    .5 .25  0.6
Ni1      0 .0895    .5 .75  0.6
Mg2      0 .1788     0 .54  0.6
Ni2      0 .1788     0 .46  0.6
Mg3      0     0     0  .2  0.6
Ni3      0     0     0  .8  0.6
Na       0 .2748    .5  .5  0.9
Ca       0 .2748    .5  .5  0.9
K    .0176    .5 .0396  .5  2.3
O1   .1096 .0885 .2160      0.8
O2   .1152 .1725 .7228      0.8
OH3  .1067     0 .7191      0.8
O4   .3556 .2471 .7892      0.8
O5   .3426 .1299 .1035      1.1
O6   .3396 .1159 .5997      1.1
O7   .3330     0 .3112      1.2