Romeite Natta G, Baccaredda M Zeitschrift fur Kristallographie 85 (1933) 271-296 Tetrossido di antimonio e antimoniati _database_code_amcsd 0010512 10.26 10.26 10.26 90 90 90 Fd3m atom x y z Ca .625 .625 .625 Sb .125 .125 .125 O1 .23 0 0 O2 0 0 0