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 = 600 C
_database_code_amcsd 0000914
10.008 18.087 5.278 90 106.69 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  .279891 .915946 .985702 .002800 .000736 .008939 0.000093 0.001567 -.000063
Si2  .287131 .829603 .486617 .002770 .000855 .009308 0.000245 0.001368 0.000096
Mg1        0 .910749      .5 .003871 .001000 .010734        0 0.001766        0
Mg2        0 .820152       0 .003976 .001073 .013237        0 0.001719        0
Mg3        0       0       0 .003925 .000799 .011714        0 0.002904        0
Na         0 .723597      .5 .009396 .001413 .018408        0 -.002370        0
Ca         0 .723597      .5 .009396 .001413 .018408        0 -.002370        0
K    .470075 .988463 .542656 .019775 .004656 .052577 -.002971 -.013012 0.002437
O1   .113094 .915579 .895356 .002979 .000984 .012620 0.000201 0.001626 -.000194
O2   .119132 .832334 .392170 .003301 .001389 .011667 0.000181 0.001258 -.000490
F3   .103301       0 .390878 .005529 .001260 .018094        0 0.002044        0
O4   .361948 .752636 .564131 .006453 .001142 .017670 0.001132 0.002957 0.000571
O5   .347232 .871696 .260310 .004116 .001736 .014426 0.000136 0.002453 0.002115
O6   .343310 .882197 .759953 .004584 .001696 .014273 -.000037 0.002856 -.002037
O7   .341288       0 .045692 .004690 .000680 .026755        0 0.001558        0