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