Omphacite
Clark J R, Papike J J
American Mineralogist 53 (1968) 840-868
Crystal-chemical characterization of omphacites
_database_code_amcsd 0000175
9.596 8.771 5.265 90 106.93 90 P2
atom      x     y     z occ Biso
Si1A  .2890 .0972 .9774      .17
Si2A  .2881 .9135 .4820      .17
Si1C  .2137 .5880 .0196      .17
Si2C  .2103 .4027 .5232      .17
Mg1       0 .9122     0 .81   .2
Fe1       0 .9122     0 .19   .2
Al11      0 .1002    .5 .95   .3
Fe11      0 .1002    .5 .05   .3
Al1H     .5 .4045     0 .82   .3
Fe1H     .5 .4045     0 .18   .3
Mg11H    .5 .5957    .5 .80   .2
Fe11H    .5 .5957    .5 .20   .2
Na2       0 .3036     0 .64   .8
Ca2       0 .3036     0 .36   .8
Na21      0 .7017    .5 .36   .7
Ca21      0 .7017    .5 .64   .7
Na2H     .5 .8009     0 .03   .8
Ca2H     .5 .8009     0 .97   .8
Na21H    .5 .1996    .5 .64   .8
Ca21H    .5 .1996    .5 .36   .8
O11A   .112  .088  .864       .4
O12A   .110  .922  .405       .4
O11C   .386  .567  .103       .4
O12C   .385  .411  .620       .4
O21A   .364  .263  .066       .4
O22A   .347  .747  .551       .4
O21C   .133  .749  .939       .4
O22C   .135  .244  .446       .4
O31A   .360  .022  .757       .4
O32A   .350  .994  .252       .4
O31C   .154  .515  .255       .4
O32C   .147  .489  .750       .4