data_global _chemical_name_mineral 'Krennerite' loop_ _publ_author_name 'Tunell G' 'Murata K J' _journal_name_full 'American Mineralogist' _journal_volume 35 _journal_year 1950 _journal_page_first 959 _journal_page_last 984 _publ_section_title ; The atomic arrangement and chemical composition of krennerite ; _database_code_amcsd 52 _chemical_formula_sum '(Au.8 Ag.2) Te2' _cell_length_a 16.54 _cell_length_b 8.82 _cell_length_c 4.46 _cell_angle_alpha 90.0 _cell_angle_beta 90.0 _cell_angle_gamma 90.0 _cell_volume 650.637 _exptl_crystal_density_diffrn 8.868 _symmetry_space_group_name_H-M 'P m a 2' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,-y,z' '1/2-x,y,z' '-x,-y,z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy Au1 0.0 0.0 0.0 0.8 Au2 0.25 0.319 0.014 0.8 Au3 0.124 0.666 0.5 0.8 Ag1 0.0 0.0 0.0 0.2 Ag2 0.25 0.319 0.014 0.2 Ag3 0.124 0.666 0.5 0.2 Te1 0.25 0.018 0.042 1.0 Te2 0.25 0.617 0.042 1.0 Te3 0.003 0.699 0.042 1.0 Te4 0.132 0.364 0.5 1.0 Te5 0.119 0.964 0.5 1.0