data_global _amcsd_formula_title 'U4O9' loop_ _publ_author_name 'Lauriat J P' 'Chevrier G' 'Boucherle J X' _journal_name_full 'Journal of Solid State Chemistry' _journal_volume 80 _journal_year 1989 _journal_page_first 80 _journal_page_last 93 _publ_section_title ; Space group of U4O9 in the beta phase Sample: P-43m refinement ; _database_code_amcsd 0013653 _chemical_formula_sum 'U O2.338' _cell_length_a 5.44 _cell_length_b 5.44 _cell_length_c 5.44 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 160.989 _exptl_crystal_density_diffrn 11.364 _symmetry_space_group_name_H-M 'P -4 3 m' loop_ _space_group_symop_operation_xyz 'x,y,z' '-z,x,-y' '-y,z,-x' '-x,y,-z' 'x,-z,-y' 'z,-y,-x' 'y,-x,-z' 'x,z,y' 'z,y,x' 'y,x,z' '-z,-x,y' '-y,-z,x' '-x,-y,z' 'z,-x,-y' 'y,-z,-x' 'x,-y,-z' '-x,z,-y' '-z,y,-x' '-y,x,-z' '-x,-z,y' '-z,-y,x' '-y,-x,z' 'z,x,y' 'y,z,x' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy _atom_site_U_iso_or_equiv U 0.75080 0.75080 0.75080 1.00000 0.01064 Oa1 0.00000 0.00000 0.00000 0.91000 0.02254 Oa2 0.50000 0.50000 0.00000 0.52000 0.02254 Ob1 0.50000 0.50000 0.50000 0.98000 0.02254 Ob2 0.50000 0.00000 0.00000 0.99000 0.02254 O*1 0.37100 0.37100 0.25100 0.08200 0.02254 O*2 0.87900 0.87900 0.25500 0.03400 0.02254 O*3 0.37400 0.86700 0.76700 0.05500 0.02254 O*1 0.37700 0.37700 0.37700 0.02500 0.02254 O*2 0.79500 0.79500 0.33400 0.01000 0.02254