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: KCo60
Atomic parameters from ICSD
_database_code_amcsd 0001582
10.0923 18.032 5.2742 90 104.829 90 C2/m
atom     x     y     z occ Biso
Si1  .2806 .0867 .3025      0.4
Si2  .2822 .1714 .8040      0.4
Mg1      0 .0895    .5 .38  0.6
Co1      0 .0895    .5 .62  0.6
Mg2      0 .1797     0  .5  0.6
Co2      0 .1797     0  .5  0.6
Mg3      0     0     0 .32  0.6
Co3      0     0     0 .68  0.6
Na       0 .2732    .5  .5  0.9
Ca       0 .2732    .5  .5  0.9
K    .0146    .5 .0572  .5  2.3
O1   .1130 .0909 .2089      0.8
O2   .1121 .1735 .7124      0.8
OH3  .1026     0 .7137      0.8
O4   .3549 .2470 .7808      0.8
O5   .3428 .1313 .1006      1.1
O6   .3413 .1166 .6083      1.1
O7   .3270     0 .3066      1.2