Cryolithionite
Geller S
American Mineralogist 56 (1971) 18-23
Refinement of the crystal structure of cryolithionite, {Na3}[Al2](Li3)F12
_database_code_amcsd 0000220
12.122 12.122 12.122 90 90 90 Ia-3d
atom       x      y      z B(1,1) B(2,2) B(3,3) B(1,2) B(1,3)  B(2,3)
Na      .125      0    .25 .00114 .00252 .00252      0      0  .00032
Al         0      0      0 .00072 .00072 .00072 .00008 .00008  .00008
Li      .375      0    .25 .00087 .00189 .00189      0      0       0
F    -.02888 .04268 .13989 .00187 .00201 .00114 .00009 .00028 -.00010