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 Na, T = 24 C
_database_code_amcsd 0000912
9.938 17.952 5.258 90 106.62 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  .281295 .915615 .985984 .001165 .000293 .004015  .000038  .000674  .000016
Si2  .287536 .828860 .486283 .001172 .000347 .003915  .000096  .000586  .000046
Mg1        0 .911155      .5 .001551 .000372 .004877        0  .000957        0
Mg2        0 .821195       0 .001585 .000439 .005896        0  .000656        0
Mg3        0       0       0 .001568 .000309 .004508        0  .000951        0
Na         0 .724328      .5 .003405 .000610 .006387        0 -.000642        0
Ca         0 .724328      .5 .003405 .000610 .006387        0 -.000642        0
K    .475620 .986849 .536544 .011674 .002323 .023153 -.002238 -.008467  .001005
O1   .113197 .915735 .895138 .001336 .000399 .006160 -.000009  .000689  .000029
O2   .118834 .832357 .392227 .001499 .000552 .005163  .000026  .000708 -.000281
F3   .103057       0 .391039 .002283 .000507 .005936        0  .000354        0
O4   .361302 .750988 .567769 .002676 .000538 .007022  .000436  .001278  .000263
O5   .349210 .869419 .258496 .001790 .000719 .006791  .000007  .001025  .000771
O6   .344776 .883070 .756179 .002200 .000688 .006326 -.000075  .001429 -.000814
O7   .343561       0 .053998 .002071 .000321 .009710        0  .000561        0