Niter Nimmo J, Lucas B Acta Crystallographica B32 (1976) 1968-1971 The crystal structures of gamma- and beta-KNO3 and the alpha-gamma-beta phase transformations _cod_database_code 1000051 _database_code_amcsd 0009568 5.487 5.487 9.156 90 90 120 R3m atom x y z K 0 0 0 N 0 0 .405 O .131 -.131 .434