data_global _chemical_name_mineral 'Covellite' loop_ _publ_author_name 'Kalbskopf R' 'Pertlik F' 'Zemann J' _journal_name_full 'Tschermaks Mineralogische und Petrographische Mitteilungen' _journal_volume 22 _journal_year 1975 _journal_page_first 242 _journal_page_last 249 _publ_section_title ; Verfeinerung der kristallstruktur des covellins, CuS, mit einkristalldaten ; _database_code_amcsd 0015657 _chemical_formula_sum 'Cu S' _cell_length_a 3.796 _cell_length_b 3.796 _cell_length_c 16.360 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 204.158 _exptl_crystal_density_diffrn 4.666 _symmetry_space_group_name_H-M 'P 63/m m c' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-x+y,1/2+z' 'x,x-y,1/2-z' '-x+y,-x,1/2-z' 'x-y,x,1/2+z' '-y,-x,z' 'y,x,-z' 'y,-x+y,-z' '-y,x-y,z' 'x-y,-y,1/2+z' '-x+y,y,1/2-z' 'x,y,1/2-z' '-x,-y,1/2+z' 'x,x-y,z' '-x,-x+y,-z' 'x-y,x,-z' '-x+y,-x,z' 'y,x,1/2+z' '-y,-x,1/2-z' '-y,x-y,1/2-z' 'y,-x+y,1/2+z' '-x+y,y,z' 'x-y,-y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Cu 0.33333 0.66667 0.75000 0.02508 Cu 0.33333 0.66667 0.10730 0.01469 S 0.33333 0.66667 0.25000 0.01798 S 0.00000 0.00000 0.06220 0.01077