Avicennite Otto H H, Baltrusch R, Brant H J Physica C 215 (1993) 205-208 Further evidence for Tl3+ in Tl-based superconductors from improved bond strength parameters involving new structural data of cubic Tl2O3 _database_code_amcsd 0015057 10.5344 10.5344 10.5344 90 90 90 Ia3 atom x y z Uiso Tl1 .25 .25 .25 .0127 Tl2 .96815 0 .25 .0081 O .3824 .3905 .1542 .024