data_global _chemical_name_mineral 'Tsumebite' loop_ _publ_author_name 'Fanfani L' 'Zanazzi P F' _journal_name_full 'Mineralogical Magazine' _journal_volume 36 _journal_year 1967 _journal_page_first 522 _journal_page_last 529 _publ_section_title ; Structural similarities of some secondary lead minerals Note: coordinates of O atoms are from arsentsumebite ; _database_code_amcsd 0014449 _chemical_compound_source 'Tsumeb, South West Africa' _chemical_formula_sum 'Pb2 Cu2 S P (O9 H)' _cell_length_a 7.85 _cell_length_b 5.80 _cell_length_c 8.70 _cell_angle_alpha 90 _cell_angle_beta 111 _cell_angle_gamma 90 _cell_volume 369.801 _exptl_crystal_density_diffrn 6.731 _symmetry_space_group_name_H-M 'P 1 21/m 1' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2-y,z' '-x,1/2+y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Pb1 0.72900 0.25000 0.25000 Pb2 0.28800 0.25000 0.39300 Cu2+ 0.00000 0.00000 0.00000 Cu2+ 0.00000 0.50000 0.00000 S 0.45400 0.75000 0.17100 P 0.03200 0.75000 0.34000 O-H1 0.17070 0.25000 0.08110 O2 -0.24130 0.25000 -0.46820 O3 0.09280 0.25000 0.55630 O4 0.43360 0.25000 0.93460 O5 0.77540 0.25000 -0.05430 O6 -0.00020 0.03020 -0.24100 O7 0.50990 0.02520 -0.28750