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: KCo20
Atomic parameters from ICSD
_database_code_amcsd 0001580
10.0711 18.015 5.2760 90 104.836 90 C2/m
atom     x     y     z occ Biso
Si1  .2747 .0855 .3012      0.4
Si2  .2851  .171 .8022      0.4
Mg1      0 .0902    .5 .76  0.6
Co1      0 .0902    .5 .24  0.6
Mg2      0   .18     0 .86  0.6
Co2      0   .18     0 .14  0.6
Mg3      0     0     0 .75  0.6
Co3      0     0     0 .25  0.6
Na       0 .2757    .5  .5  0.9
Ca       0 .2757    .5  .5  0.9
K    .0178    .5 .0321  .5  2.3
O1   .1083 .0887 .2138      0.8
O2   .1184 .1721 .7233      0.8
OH3  .1087     0 .7158      0.8
O4   .3574 .2485 .7876      0.8
O5   .3395 .1308 .0965      1.1
O6    .339 .1162 .5955      1.1
O7   .3308     0 .3091      1.2