Carnegieite high Barth F, Posnjak E Zeitschrift fur Kristallographie 81 (1932) 376-385 Silicate structures of the cristobalite type: III. Structural relationship of high-cristobalite, alpha-Carnegieite, and Na2SiO4 _cod_database_code 1010953 _database_code_amcsd 0017673 7.37 7.37 7.37 90 90 90 P2_13 atom x y z Si1 0 0 0 Al1 .258 .258 .258 Na1 .745 .745 .745 O1 .125 .125 .125 O2 .66 .645 .056