data_global _chemical_name_mineral 'Watkinsonite' loop_ _publ_author_name 'Topa D' 'Makovicky E' 'Sejkora J' 'Dittrich H' _journal_name_full 'The Canadian Mineralogist' _journal_volume 48 _journal_year 2010 _journal_page_first 1109 _journal_page_last 1118 _publ_section_title ; The crystal structure of watkinsonite, Cu2PbBi4Se8, from the Zalesi uranium deposit, Czech Republic ; _database_code_amcsd 0017825 _chemical_compound_source 'Zalesi uranium deposit, Czech Republic' _chemical_formula_sum 'Cu1.68 Ag.32 Pb Bi4 Se8' _cell_length_a 12.952 _cell_length_b 4.1523 _cell_length_c 15.155 _cell_angle_alpha 90 _cell_angle_beta 108.931 _cell_angle_gamma 90 _cell_volume 770.959 _exptl_crystal_density_diffrn 7.823 _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 _atom_site_occupancy _atom_site_U_iso_or_equiv Cu1 0.37880 0.25000 0.90090 0.68000 0.08800 Ag1 0.38600 0.25000 0.90060 0.32000 0.07900 Cu2 0.47134 0.25000 0.53715 1.00000 0.02580 Pb 0.23691 0.25000 0.33139 1.00000 0.02880 Bi1 0.04295 0.25000 0.88759 1.00000 0.01670 Bi2 0.56525 0.25000 0.29021 1.00000 0.01610 Bi3 0.70545 0.25000 0.90960 1.00000 0.01730 Bi4 0.92454 0.25000 0.37818 1.00000 0.02130 Se1 0.12568 0.25000 0.50967 1.00000 0.01410 Se2 0.13530 0.25000 0.11562 1.00000 0.01520 Se3 0.30144 0.25000 0.73696 1.00000 0.01890 Se4 0.43836 0.25000 0.06837 1.00000 0.01850 Se5 0.61451 0.25000 0.70857 1.00000 0.01610 Se6 0.63573 0.25000 0.48096 1.00000 0.01510 Se7 0.80926 0.25000 0.11716 1.00000 0.01550 Se8 0.95263 0.25000 0.69674 1.00000 0.01360 loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 Cu1 0.06000 0.18400 0.02500 0.00000 0.02100 0.00000 Ag1 0.10900 0.09700 0.00700 0.00000 -0.01200 0.00000 Cu2 0.03000 0.01200 0.03700 0.00000 0.01400 0.00000 Pb 0.02550 0.01740 0.04380 0.00000 0.01170 0.00000 Bi1 0.01760 0.01260 0.01890 0.00000 0.00430 0.00000 Bi2 0.01520 0.01280 0.01930 0.00000 0.00420 0.00000 Bi3 0.01550 0.01200 0.02240 0.00000 0.00340 0.00000 Bi4 0.01870 0.01670 0.02570 0.00000 0.00310 0.00000 Se1 0.01260 0.01300 0.01600 0.00000 0.00400 0.00000 Se2 0.01270 0.01400 0.01700 0.00000 0.00300 0.00000 Se3 0.01370 0.01300 0.03000 0.00000 0.00700 0.00000 Se4 0.01730 0.01400 0.02600 0.00000 0.00900 0.00000 Se5 0.01500 0.01200 0.02100 0.00000 0.00600 0.00000 Se6 0.01350 0.01200 0.01800 0.00000 0.00200 0.00000 Se7 0.01320 0.01300 0.02000 0.00000 0.00400 0.00000 Se8 0.01360 0.01100 0.01500 0.00000 0.00300 0.00000