data_global _amcsd_formula_title 'Cu2 Hg I4' loop_ _publ_author_name 'Ketelaar J' _journal_name_full 'Zeitschrift fur Kristallographie' _journal_volume 80 _journal_year 1931 _journal_page_first 190 _journal_page_last 203 _publ_section_title ; Strukturbestimmung der komplexen Quecksilber-Verbindungen Ag2 Hg I4 und Cu2 Hg I4 _cod_database_code 1010460 ; _database_code_amcsd 0017379 _chemical_formula_sum 'Hg Cu2 I4' _cell_length_a 6.08 _cell_length_b 6.08 _cell_length_c 6.135 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 226.789 _exptl_crystal_density_diffrn 6.116 _symmetry_space_group_name_H-M 'P -4 2 m' loop_ _space_group_symop_operation_xyz 'x,y,z' '-y,-x,z' 'y,-x,-z' '-x,y,-z' '-x,-y,z' 'y,x,z' '-y,x,-z' 'x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Hg1 0.00000 0.00000 0.00000 Cu1 0.00000 0.50000 0.50000 I1 0.25500 0.25500 0.27500