Fluoro-richterite
Cameron M, Sueno S, Papike J J, Prewitt C T
American Mineralogist 68 (1983) 924-943
High temperature crystal chemistry of K and Na fluor-richterites
Note: sample K, T = 800 C
_database_code_amcsd 0000920
10.104 18.159 5.285 90 105.85 90 I2/m
atom       x       y       z  B(1,1)  B(2,2)  B(3,3)   B(1,2)   B(1,3)   B(2,3)
Si1  .274855 .915721 .976838 .003363 .000958 .011589 0.000165 0.001450 -.000065
Si2  .284752 .829345 .480509 .003443 .001032 .011063 0.000228 0.001318 0.000070
Mg1        0 .909825      .5 .004978 .001283 .013404        0 0.002046        0
Mg2        0 .819130       0 .004983 .001445 .017141        0 0.001634        0
Mg3        0       0       0 .005317 .001206 .015200        0 0.003631        0
Na         0 .721602      .5 .010752 .001719 .022644        0 -.003039        0
Ca         0 .721602      .5 .010752 .001719 .022644        0 -.003039        0
K    .474736       0 .533448 .018746 .004231 .049215        0 -.011018        0
O1   .110823 .914582 .890979 .003808 .001446 .016465 0.000114 0.002123 -.000431
O2   .119256 .830623 .392625 .003670 .001663 .016113 0.000489 0.001099 -.000480
F3   .101383       0 .388422 .007002 .001815 .021222        0 0.000515        0
O4   .361346 .753736 .559120 .008197 .001371 .023242 0.001420 0.002941 0.000653
O5   .342041 .872215 .251104 .005330 .002035 .016180 0.000133 0.002114 0.002148
O6   .338652 .881436 .751406 .005038 .001985 .017666 -.000113 0.003241 -.002126
O7   .331460       0 .026425 .006405 .000947 .028009        0 0.002117        0