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 = 13 K
 Note: dimorphic with stromeyerite
;
_database_code_amcsd 0009857
_chemical_compound_source 'Gowganda, Ontario, Canada'
_chemical_formula_sum 'Cu Ag S'
_cell_length_a 4.0431
_cell_length_b 6.5910
_cell_length_c 7.9149
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 210.917
_exptl_crystal_density_diffrn      6.408
_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
_atom_site_U_iso_or_equiv
Cu1   0.00000   0.56900   0.72000   0.00950
Cu2   0.50000   0.07500   0.73800   0.00810
Ag1   0.00000  -0.05600   0.50000   0.01800
Ag2   0.50000   0.42700   0.96360   0.01500
S1   0.00000   0.20200   0.71200   0.00600
S2   0.50000   0.72200   0.76800   0.07400