data_global _amcsd_formula_title 'K O3.5 U' loop_ _publ_author_name 'Jove J' 'Cousson A' 'Gasperin M' _journal_name_full 'Journal of the Less-Common Metals' _journal_volume 139 _journal_year 1988 _journal_page_first 345 _journal_page_last 350 _publ_section_title ; Synthesis and crystal structure of K2 U2 O7 and Mossbauer (237 Np) studies of K2 Np2 O7 and Ca Np O4 _cod_database_code 1001381 ; _database_code_amcsd 0014163 _chemical_formula_sum 'U1.002 K O3.5' _cell_length_a 3.96 _cell_length_b 3.96 _cell_length_c 19.82 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 269.169 _exptl_crystal_density_diffrn 6.174 _symmetry_space_group_name_H-M 'R -3 m' loop_ _space_group_symop_operation_xyz 'x,y,z' '2/3+x,1/3+y,1/3+z' '1/3+x,2/3+y,2/3+z' 'x,x-y,z' '2/3+x,1/3+x-y,1/3+z' '1/3+x,2/3+x-y,2/3+z' 'y,x,-z' '2/3+y,1/3+x,1/3-z' '1/3+y,2/3+x,2/3-z' '-x+y,y,z' '2/3-x+y,1/3+y,1/3+z' '1/3-x+y,2/3+y,2/3+z' '-x,-x+y,-z' '2/3-x,1/3-x+y,1/3-z' '1/3-x,2/3-x+y,2/3-z' '-y,-x,z' '2/3-y,1/3-x,1/3+z' '1/3-y,2/3-x,2/3+z' 'x-y,-y,-z' '2/3+x-y,1/3-y,1/3-z' '1/3+x-y,2/3-y,2/3-z' 'y,-x+y,-z' '2/3+y,1/3-x+y,1/3-z' '1/3+y,2/3-x+y,2/3-z' '-x+y,-x,z' '2/3-x+y,1/3-x,1/3+z' '1/3-x+y,2/3-x,2/3+z' '-x,-y,-z' '2/3-x,1/3-y,1/3-z' '1/3-x,2/3-y,2/3-z' '-y,x-y,z' '2/3-y,1/3+x-y,1/3+z' '1/3-y,2/3+x-y,2/3+z' 'x-y,x,-z' '2/3+x-y,1/3+x,1/3-z' '1/3+x-y,2/3+x,2/3-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy U1 0.04430 0.00000 0.00000 0.16700 K1 0.00000 0.00000 0.50000 1.00000 O1 0.00000 0.00000 0.09360 1.00000 O2 0.04120 -0.06400 0.34290 0.12500