data_global _chemical_name_mineral 'Skippenite' loop_ _publ_author_name 'Bindi L' 'Cipriani C' _journal_name_full 'The Canadian Mineralogist' _journal_volume 42 _journal_year 2004 _journal_page_first 835 _journal_page_last 840 _publ_section_title ; The crystal structure of skippenite, Bi2Se2Te, from the Kochkar deposit, southern Urals, Russian Federation ; _database_code_amcsd 0005942 _chemical_compound_source 'Kochkar deposit, southern Urals, Russia' _chemical_formula_sum 'Bi2 Se2 Te' _cell_length_a 4.183 _cell_length_b 4.183 _cell_length_c 29.137 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 441.521 _exptl_crystal_density_diffrn 7.937 _symmetry_space_group_name_H-M 'R -3 m' loop_ _space_group_symop_operation_xyz 'x,y,z' '2/3+x,1/3+y,1/3+z' '1/3+x,2/3+y,2/3+z' 'x,x-y,z' '2/3+x,1/3+x-y,1/3+z' '1/3+x,2/3+x-y,2/3+z' 'y,x,-z' '2/3+y,1/3+x,1/3-z' '1/3+y,2/3+x,2/3-z' '-x+y,y,z' '2/3-x+y,1/3+y,1/3+z' '1/3-x+y,2/3+y,2/3+z' '-x,-x+y,-z' '2/3-x,1/3-x+y,1/3-z' '1/3-x,2/3-x+y,2/3-z' '-y,-x,z' '2/3-y,1/3-x,1/3+z' '1/3-y,2/3-x,2/3+z' 'x-y,-y,-z' '2/3+x-y,1/3-y,1/3-z' '1/3+x-y,2/3-y,2/3-z' 'y,-x+y,-z' '2/3+y,1/3-x+y,1/3-z' '1/3+y,2/3-x+y,2/3-z' '-x+y,-x,z' '2/3-x+y,1/3-x,1/3+z' '1/3-x+y,2/3-x,2/3+z' '-x,-y,-z' '2/3-x,1/3-y,1/3-z' '1/3-x,2/3-y,2/3-z' '-y,x-y,z' '2/3-y,1/3+x-y,1/3+z' '1/3-y,2/3+x-y,2/3+z' 'x-y,x,-z' '2/3+x-y,1/3+x,1/3-z' '1/3+x-y,2/3+x,2/3-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Bi 0.00000 0.00000 0.39806 0.03900 Se 0.00000 0.00000 0.21160 0.02520 Te 0.00000 0.00000 0.00000 0.03320 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 Bi 0.04070 0.04070 0.03560 0.02030 0.00000 0.00000 Se 0.02740 0.02740 0.02090 0.01370 0.00000 0.00000 Te 0.03720 0.03720 0.02520 0.01860 0.00000 0.00000