Carnegieite Barth F, Posnjak E Zeitschrift fur Kristallographie 81 (1932) 135-141 Silicate structures of the cristobalite type. The crystal structure of alpha-carnegieite (Na Al Si O4) _cod_database_code 1010957 _database_code_amcsd 0017677 7.37 7.37 7.37 90 90 90 P2_13 atom x y z Na1 .744 .744 .744 Al1 .258 .258 .258 Si1 0 0 0 O1 .125 .125 .125 O2 .658 .644 .0556