data_global _chemical_name_mineral 'Wurtzite-2H' loop_ _publ_author_name 'Ballentyne D W G' 'Roy B' _journal_name_full 'Physica' _journal_volume 27 _journal_year 1961 _journal_page_first 337 _journal_page_last 341 _publ_section_title ; Electroluminescence and crystal structure in the alloy system ZnS - CdS ; _database_code_amcsd 0014998 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'Zn S' _cell_length_a 3.818 _cell_length_b 3.818 _cell_length_c 6.26 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 79.027 _exptl_crystal_density_diffrn 4.096 _symmetry_space_group_name_H-M 'P 63 m c' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-x+y,1/2+z' 'x-y,x,1/2+z' '-y,-x,z' '-y,x-y,z' 'x-y,-y,1/2+z' '-x,-y,1/2+z' 'x,x-y,z' '-x+y,-x,z' 'y,x,1/2+z' 'y,-x+y,1/2+z' '-x+y,y,z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Zn 0.33333 0.66667 0.00000 0.01140 S 0.33333 0.66667 0.37500 0.00887