data_global _chemical_name_mineral 'Empressite' loop_ _publ_author_name 'Bindi L' 'Spry P G' 'Cipriani C' _journal_name_full 'American Mineralogist' _journal_volume 89 _journal_year 2004 _journal_page_first 1043 _journal_page_last 1047 _publ_section_title ; Empressite, AgTe, from the Empress-Josephine Mine, Colorado, USA: Composition, physical properties, and determination of the crystal structure ; _database_code_amcsd 0003585 _chemical_formula_sum 'Ag Te' _cell_length_a 8.882 _cell_length_b 20.100 _cell_length_c 4.614 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 823.729 _exptl_crystal_density_diffrn 7.595 _symmetry_space_group_name_H-M 'P m n b' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2-x,y,z' '1/2+x,-y,-z' '1/2+x,1/2-y,1/2+z' '1/2-x,1/2+y,1/2-z' 'x,1/2+y,1/2-z' '-x,1/2-y,1/2+z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Ag1 0.75000 0.05130 0.16690 0.03520 Ag2 0.25000 0.15582 0.74330 0.03250 Ag3 0.52010 0.06565 0.64990 0.05140 Te1 0.52280 0.15783 0.09990 0.01650 Te2 0.25000 0.26324 0.35100 0.01630 Te3 0.25000 0.03365 0.34170 0.01740 loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 Ag1 0.04340 0.03300 0.02930 0.00000 0.00000 0.00690 Ag2 0.03170 0.03210 0.03370 0.00000 0.00000 0.00730 Ag3 0.04270 0.05170 0.05990 0.02240 -0.02330 -0.03360 Te1 0.01400 0.01680 0.01870 0.00040 0.00190 0.00030 Te2 0.01640 0.01520 0.01720 0.00000 0.00000 -0.00120 Te3 0.01490 0.01580 0.02140 0.00000 0.00000 0.00050