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 = 400 C
_database_code_amcsd 0000918
10.041 18.056 5.272 90 105.83 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  .276177 .915547 .977002 .002152 .000610 .007375 0.000065 0.001249 0.000004
Si2  .285421 .828897 .480690 .002103 .000651 .007030 0.000155 0.000645 0.000076
Mg1        0 .910209      .5 .003012 .000770 .008699        0 0.001242        0
Mg2        0 .820156       0 .002942 .000851 .010729        0 0.000563        0
Mg3        0       0       0 .003279 .000665 .008364        0 0.001268        0
Na         0 .722197      .5 .006764 .001053 .013550        0 -.001847        0
Ca         0 .722197      .5 .006764 .001053 .013550        0 -.001847        0
K    .482215       0 .525314 .019383 .003020 .037572        0 -.014580        0
O1   .111184 .914716 .891798 .002381 .000907 .009824 0.000214 0.000497 -.000345
O2   .118032 .830999 .392406 .002599 .001165 .009653 0.000045 0.000920 -.000602
F3   .101850       0 .387746 .003860 .001389 .013062        0 0.000725        0
O4   .360771 .752215 .560540 .004456 .001012 .016637 0.001140 0.001538 0.000668
O5   .343679 .870759 .250588 .003484 .001174 .010428 -.000030 0.001148 0.001121
O6   .340387 .882039 .750258 .003505 .001433 .010172 -.000023 0.001676 -.001427
O7   .334334       0 .029711 .004427 .000546 .019861        0 0.000407        0