data_global _chemical_name_mineral 'Wurtzite-8H' loop_ _publ_author_name 'Evans H T' 'McKnight E T' _journal_name_full 'American Mineralogist' _journal_volume 44 _journal_year 1959 _journal_page_first 1210 _journal_page_last 1218 _publ_section_title ; New wurtzite polytypes from Joplin, Missouri ; _database_code_amcsd 0000089 _chemical_formula_sum 'Zn S' _cell_length_a 3.82 _cell_length_b 3.82 _cell_length_c 24.96 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 315.429 _exptl_crystal_density_diffrn 4.104 _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 Zn1 0.00000 0.00000 0.00000 Zn2 0.33333 0.66667 0.12500 Zn3 0.33333 0.66667 0.37500 Zn4 0.33333 0.66667 0.75000 S1 0.00000 0.00000 0.09380 S2 0.33333 0.66667 0.21880 S3 0.33333 0.66667 0.46880 S4 0.33333 0.66667 0.84380