Richterite
Della Ventura G, Robert J-L, Raudsepp M, Hawthorne F C, Welch M D
American Mineralogist 82 (1997) 291-301
Site occupancies in synthetic monoclinic amphiboles: Rietveld structure
refinement and infrared spectroscopy of (nickel, magnesium, cobalt)-richterite
Sample: Ni20
_database_code_amcsd 0001876
9.9073 17.978 5.2669 90 104.303 90 C2/m
atom     x     y     z  occ
Si1  .2796 .0849 .2940
Si2  .2852 .1702 .8016
Mg1      0 .0889    .5  .77
Ni1      0 .0889    .5  .23
Mg2      0 .1767     0  .89
Ni2      0 .1767     0  .11
Mg3      0     0     0  .70
Ni3      0     0     0  .30
Ca4      0 .2757    .5 .545
Na4      0 .2757    .5 .455
Na       0 .4835     0  .91
O1   .1153 .0869 .2171
O2   .1110 .1698 .7233
O3   .1108     0 .7075
O4   .3579 .2480 .7778
O5   .3428 .1307 .0871
O6   .3364 .1134 .5925
O7   .3337     0 .2943