data_global _chemical_name_mineral 'Cotunnite' loop_ _publ_author_name 'Wyckoff R W G' _journal_name_full 'Crystal Structures' _journal_volume 1 _journal_year 1963 _journal_page_first 298 _journal_page_last 306 _publ_section_title ; Second edition. Interscience Publishers, New York, New York ; _database_code_amcsd 0011874 _chemical_formula_sum 'Pb Cl2' _cell_length_a 9.030 _cell_length_b 7.608 _cell_length_c 4.525 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 310.869 _exptl_crystal_density_diffrn 5.942 _symmetry_space_group_name_H-M 'P b n m' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,y,1/2-z' '-x,-y,1/2+z' '1/2+x,1/2-y,1/2+z' '1/2-x,1/2+y,1/2-z' '1/2-x,1/2+y,z' '1/2+x,1/2-y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Pb 0.09560 0.26170 0.25000 Cl1 0.07420 0.86100 0.25000 Cl2 0.83700 0.47680 0.25000