Na2 O4 Si Zn Joubert-Bettan C, Lachenal R, Bertaut E, Parthe E Journal of Solid State Chemistry 1 (1969) 1-5 The crystal structures of Na2 Zn Si O4, Na2 Zn Ge O4 and Na2 Mg Ge O4 _cod_database_code 1009030 _database_code_amcsd 0016892 7.02 5.44 5.24 90 90.1 90 Pn atom x y z Na1 .746 .695 .997 Na2 .505 .177 .997 Zn1 .003 .192 .999 Si1 .245 .688 0 O1 .724 .601 .435 O2 .556 .154 .437 O3 .935 .221 .359 O4 .286 .689 .302