Al2.66 O4 Shirasuka K, Yanagida H, Yamaguchi G Yogyo Kyokai Shi 84 (1976) 610-613 The preparation of eta alumina and its structure _cod_database_code 1200015 _database_code_amcsd 0018290 7.906 7.906 7.906 90 90 90 Fd3m atom x y z occ O1 .37 .37 .37 Al1 .25 .25 .25 .503 Al2 .25 0 0 .083 Al3 .625 .625 .625 .564 Al4 .125 .125 .125 .27