data_global _chemical_name_mineral 'Berndtite' loop_ _publ_author_name 'Oftedal I' _journal_name_full 'Norsk Geologisk Tidsskrift' _journal_volume 9 _journal_year 1926 _journal_page_first 225 _journal_page_last 233 _publ_section_title ; Die Kristallstruktur von Sn S2 _cod_database_code 1011330 ; _database_code_amcsd 0018172 _chemical_formula_sum 'Sn S2' _cell_length_a 3.62 _cell_length_b 3.62 _cell_length_c 5.85 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 66.390 _exptl_crystal_density_diffrn 4.573 _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' '-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 Sn1 0.00000 0.00000 0.00000 S1 0.33333 0.66667 0.25000