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: Mg(100)
_database_code_amcsd 0001875
9.9076 17.988 5.2706 90 104.252 90 C2/m
atom     x     y     z  occ
Si1  .2808 .0853 .2977
Si2  .2847 .1697 .7973
Mg1      0 .0892    .5
Mg2      0 .1772     0
Mg3      0     0     0
Ca4      0 .2751    .5 .525
Na4      0 .2751    .5 .475
NaA      0 .4791     0  .95
O1   .1165 .0870 .2234
O2   .1079 .1695 .7169
O3   .1066     0 .7120
O4   .3538 .2493 .7796
O5   .3433 .1296 .0863
O6   .3389 .1122 .5966
O7   .3379     0 .3025