data_global _chemical_name_mineral 'Arsenic' loop_ _publ_author_name 'Wyckoff R W G' _journal_name_full 'Crystal Structures' _journal_volume 1 _journal_year 1963 _journal_page_first 7 _journal_page_last 83 _publ_section_title ; Second edition. Interscience Publishers, New York, New York ; _database_code_amcsd 0011252 _chemical_formula_sum 'As' _cell_length_a 4.131 _cell_length_b 4.131 _cell_length_c 4.131 _cell_angle_alpha 54.167 _cell_angle_beta 54.167 _cell_angle_gamma 54.167 _cell_volume 43.061 _exptl_crystal_density_diffrn 5.778 _symmetry_space_group_name_H-M 'R -3 m' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-z,-y' '-z,-x,-y' 'y,x,z' 'y,z,x' '-z,-y,-x' '-x,-y,-z' 'x,z,y' 'z,x,y' '-y,-x,-z' '-y,-z,-x' 'z,y,x' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z As 0.22600 0.22600 0.22600