Cryptomelane Vicat J, Fanchon E, Strobel P, Tran Qui D Acta Crystallographica B42 (1986) 162-167 The structure of K1.33Mn8O16 and cation ordering in hollandite-type structures Locality: synthetic _cod_database_code 1008322 _database_code_amcsd 0016237 9.866 9.866 2.872 90 90 90 I4/m atom x y z occ K 0 0 .3754 .3333 Mn .34891 .16621 0 O1 .15445 .20295 0 O2 .54206 .16496 0