Cryolite Zhou Q, Kennedy B J Journal of Solid State Chemistry 177 (2004) 654-659 High-temperature powder synchrotron diffraction studies of synthetic cryolite Na3AlF6 Locality: synthetic Sample: T = 600 C, ordered model _database_code_amcsd 0014039 7.935 7.935 7.935 90 90 90 Fm3m atom x y z Biso Na1 0 0 0 4.4 Na2 .25 .25 .25 5.5 Al .5 .5 .5 .6 F 0 0 .2838 9.2