data_global _chemical_name_mineral 'Stromeyerite' loop_ _publ_author_name 'Baker C L' 'Lincoln F J' 'Johnson A W S' _journal_name_full 'Acta Crystallographica, Section B' _journal_volume 47 _journal_year 1991 _journal_page_first 891 _journal_page_last 899 _publ_section_title ; A low-temperature structural phase transformation in CuAgS Sample: T = 120 K Note: dimorphic with stromeyerite ; _database_code_amcsd 0009856 _chemical_compound_source 'Gowganda, Ontario, Canada' _chemical_formula_sum 'Cu Ag S' _cell_length_a 4.0470 _cell_length_b 6.5920 _cell_length_c 7.9300 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 211.555 _exptl_crystal_density_diffrn 6.389 _symmetry_space_group_name_H-M 'P m c 21' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,-y,1/2+z' '-x,y,z' '-x,-y,1/2+z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Cu1 0.00000 0.56740 0.72970 Cu2 0.50000 0.06630 0.74240 Ag1 0.00000 -0.05600 0.50000 Ag2 0.50000 0.44020 0.97280 S1 0.00000 0.21610 0.72150 S2 0.50000 0.71330 0.75940 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 Cu1 0.00550 0.01070 0.01220 0.00000 0.00000 0.00130 Cu2 0.00580 0.00880 0.00940 0.00000 0.00000 0.00060 Ag1 0.01030 0.03220 0.01170 0.00000 0.00000 -0.01380 Ag2 0.01380 0.02330 0.00770 0.00000 0.00000 0.00370 S1 0.00380 0.00580 0.00850 0.00000 0.00000 0.00020 S2 0.00560 0.00730 0.00920 0.00000 0.00000 -0.00090