data_global _chemical_name_mineral 'Ponomarevite' loop_ _publ_author_name 'de Boer J J' 'Bright D' 'Helle J N' _journal_name_full 'Acta Crystallographica, Section B' _journal_volume 28 _journal_year 1972 _journal_page_first 3436 _journal_page_last 3437 _publ_section_title ; The structure of the potassium salt of mu4-oxo-hexa-mu-chloro- tetra[chlorocuprate(II)], K4Cu4OCl10 ; _database_code_amcsd 0009464 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'K4 Cu4 O Cl10' _cell_length_a 14.70 _cell_length_b 14.88 _cell_length_c 8.95 _cell_angle_alpha 90 _cell_angle_beta 104.74 _cell_angle_gamma 90 _cell_volume 1893.260 _exptl_crystal_density_diffrn 2.740 _symmetry_space_group_name_H-M 'C 1 2/c 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,1/2+z' '1/2+x,1/2-y,1/2+z' '-x,y,1/2-z' '1/2-x,1/2+y,1/2-z' '-x,-y,-z' '1/2-x,1/2-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv K1 0.15900 0.12950 0.37580 0.03546 K2 0.13150 0.42710 0.14010 0.03800 Cu1 0.06140 0.29140 -0.36800 0.02305 Cu2 0.09210 0.14130 -0.11490 0.02634 O 0.00000 0.21680 -0.25000 0.01646 Cl1 0.19560 0.20420 -0.27420 0.03166 Cl2 -0.05210 0.22490 -0.58480 0.03166 Cl3 0.00000 0.41520 -0.25000 0.03420 Cl4 0.00000 0.01980 -0.25000 0.05446 Cl5 0.12140 0.38200 -0.51960 0.03166 Cl6 0.20610 0.05980 0.04230 0.02913