data_global _chemical_name_mineral 'Weissite' loop_ _publ_author_name 'Baranova R V' 'Avilov A S' 'Pinsker Z G' _journal_name_full 'Soviet Physics Crystallography' _journal_volume 18 _journal_year 1974 _journal_page_first 736 _journal_page_last 740 _publ_section_title ; Determination of the crystal structure of the hexagonal phase betaIII in the copper-tellurium system by electron diffraction ; _database_code_amcsd 0015565 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'Cu1.812 Te' _cell_length_a 8.37 _cell_length_b 8.37 _cell_length_c 21.6 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 1310.495 _exptl_crystal_density_diffrn 7.383 _symmetry_space_group_name_H-M 'P 3 m 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '-y,-x,z' '-y,x-y,z' 'x,x-y,z' '-x+y,-x,z' '-x+y,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 0.50000 -0.50000 0.00000 0.50000 0.02533 Cu2 0.66667 0.33333 0.04500 1.00000 0.02533 Cu3 0.83500 -0.83500 0.06100 1.00000 0.02533 Cu4 0.33333 0.66667 0.06200 1.00000 0.02533 Cu5 0.00000 0.00000 0.22500 1.00000 0.02533 Cu6 0.49600 -0.49600 0.22500 1.00000 0.02533 Cu7 0.16200 -0.16200 0.25400 0.50000 0.02533 Cu8 0.82500 -0.82500 0.27000 1.00000 0.02533 Cu9 0.33333 0.66667 0.27100 1.00000 0.02533 Cu10 0.00000 0.00000 0.32700 1.00000 0.02533 Cu11 0.66667 0.33333 0.36800 1.00000 0.02533 Cu12 0.83000 -0.83000 0.49900 0.50000 0.02533 Cu13 0.16000 -0.16000 0.62000 1.00000 0.02533 Cu14 0.00000 0.00000 0.67200 1.00000 0.02533 Cu15 0.49500 -0.49500 0.67500 1.00000 0.02533 Cu16 0.66667 0.33333 0.69700 1.00000 0.02533 Cu17 0.83500 -0.83500 0.73100 1.00000 0.02533 Cu18 0.33333 0.66667 0.73200 1.00000 0.02533 Cu19 0.00000 0.00000 0.77800 1.00000 0.02533 Cu20 0.50500 -0.50500 0.77900 1.00000 0.02533 Cu21 0.16300 -0.16300 0.93200 1.00000 0.02533 Cu22 0.82800 -0.82800 0.93900 1.00000 0.02533 Cu23 0.33333 0.66667 0.94000 1.00000 0.02533 Cu24 0.00000 0.00000 0.99800 1.00000 0.02533 Te1 0.00000 0.00000 0.11400 1.00000 0.02533 Te2 0.50500 -0.50500 0.11500 1.00000 0.02533 Te3 0.83500 -0.83500 0.39000 1.00000 0.02533 Te4 0.33333 0.66667 0.39200 1.00000 0.02533 Te5 0.00000 0.00000 0.44200 1.00000 0.02533 Te6 0.50500 -0.50500 0.44200 1.00000 0.02533 Te7 0.49700 -0.49700 0.55700 1.00000 0.02533 Te8 0.00000 0.00000 0.55800 1.00000 0.02533 Te9 0.33333 0.66667 0.60900 1.00000 0.02533 Te10 0.82500 -0.82500 0.60900 1.00000 0.02533 Te11 0.49500 -0.49500 0.88400 1.00000 0.02533 Te12 0.00000 0.00000 0.88500 1.00000 0.02533