data_global _chemical_name_mineral 'Avicennite' loop_ _publ_author_name 'Otto H H' 'Baltrusch R' 'Brant H J' _journal_name_full 'Physica C' _journal_volume 215 _journal_year 1993 _journal_page_first 205 _journal_page_last 208 _publ_section_title ; Further evidence for Tl3+ in Tl-based superconductors from improved bond strength parameters involving new structural data of cubic Tl2O3 ; _database_code_amcsd 0015057 _chemical_formula_sum 'Tl2 O3' _cell_length_a 10.5344 _cell_length_b 10.5344 _cell_length_c 10.5344 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 1169.040 _exptl_crystal_density_diffrn 10.381 _symmetry_space_group_name_H-M 'I a 3' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,1/2+z' '1/2+z,x,1/2-y' '+z,1/2+x,-y' '1/2+z,-x,y' '+z,1/2-x,1/2+y' '-z,x,1/2+y' '1/2-z,1/2+x,+y' '-z,-x,-y' '1/2-z,1/2-x,1/2-y' '1/2+y,1/2-z,-x' '+y,-z,1/2-x' '-y,1/2-z,x' '1/2-y,-z,1/2+x' '1/2-y,z,-x' '-y,1/2+z,1/2-x' 'y,z,x' '1/2+y,1/2+z,1/2+x' 'x,1/2-y,1/2+z' '1/2+x,-y,+z' '-x,y,1/2+z' '1/2-x,1/2+y,+z' 'x,1/2+y,-z' '1/2+x,+y,1/2-z' '-x,-y,-z' '1/2-x,1/2-y,1/2-z' '1/2-z,-x,1/2+y' '-z,1/2-x,+y' '1/2-z,x,-y' '-z,1/2+x,1/2-y' 'z,-x,1/2-y' '1/2+z,1/2-x,-y' 'z,x,y' '1/2+z,1/2+x,1/2+y' '1/2-y,1/2+z,x' '-y,+z,1/2+x' 'y,1/2+z,-x' '1/2+y,+z,1/2-x' '1/2+y,-z,x' '+y,1/2-z,1/2+x' '-y,-z,-x' '1/2-y,1/2-z,1/2-x' '-x,1/2+y,1/2-z' '1/2-x,+y,-z' 'x,-y,1/2-z' '1/2+x,1/2-y,-z' '-x,1/2-y,z' '1/2-x,-y,1/2+z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Tl1 0.25000 0.25000 0.25000 0.01270 Tl2 0.96815 0.00000 0.25000 0.00810 O 0.38240 0.39050 0.15420 0.02400