Bi2Al4O9 Niizeki N, Wachi M Zeitschrift fur Kristallographie 127 (1968) 173-187 The crystal structures of Bi2Mn4O10, Bi2Al4O9 and Bi2Fe4O9 _database_code_amcsd 0010663 7.712 8.112 5.708 90 90 90 Pbam atom x y z Biso Bi .1704 .1668 0 .49 Al1 .5 0 .257 .7 Al2 .347 .339 .5 .8 O1 0 0 .5 1.0 O2 .380 .201 .251 1.1 O3 .140 .433 .5 1.0 O4 .143 .426 0 1.1