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 = 600 C
_database_code_amcsd 0000919
10.070 18.106 5.278 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  .275351 .915535 .976894 .002599 .000748 .008620 0.000014 0.000793 -.000067
Si2  .285122 .829132 .480556 .002882 .000854 .008677 0.000272 0.001229 0.000214
Mg1        0 .910039      .5 .003685 .001094 .011581        0 0.001635        0
Mg2        0 .819693       0 .003835 .001026 .012349        0 0.000444        0
Mg3        0       0       0 .003888 .000904 .010287        0 0.002755        0
Na         0 .721732      .5 .008572 .001392 .018030        0 -.002557        0
Ca         0 .721732      .5 .008572 .001392 .018030        0 -.002557        0
K    .475912       0 .526849 .015684 .003378 .046114        0 -.011537        0
O1   .110445 .914716 .891434 .003356 .001189 .011769 0.000199 0.000850 -.000644
O2   .118650 .830848 .392283 .002842 .001461 .010712 0.000212 0.001230 -.000641
F3   .102545       0 .387396 .005636 .001653 .013664        0 0.001416        0
O4   .361498 .753143 .559350 .006705 .001211 .019387 0.001199 0.002843 0.000462
O5   .343231 .871667 .250219 .003840 .001715 .013446 0.000240 0.001495 0.001751
O6   .339558 .881909 .751789 .004426 .001762 .012399 -.000226 0.002982 -.001973
O7   .333076       0 .028690 .004975 .000731 .024596        0 0.001239        0