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