data_global
_chemical_name_mineral 'Billingsleyite'
loop_
_publ_author_name
'Pertlik F'
_journal_name_full 'Journal of Solid State Chemistry'
_journal_volume 112 
_journal_year 1994
_journal_page_first 170
_journal_page_last 175
_publ_section_title
;
 Hydrothermal synthesis and crystal structure determination of heptasilver(I)-disulfur-tetrathioarsenate(V),
 Ag7S2(AsS4), with a survey on thioarsenate anions
;
_database_code_amcsd 0013828
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Ag7 As S6'
_cell_length_a 10.475
_cell_length_b 10.475
_cell_length_c 10.475
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 1149.376
_exptl_crystal_density_diffrn      5.908
_symmetry_space_group_name_H-M 'P 21 3'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-z,-x,1/2+y'
  '-z,1/2+x,1/2-y'
  '1/2+z,1/2-x,-y'
  'z,x,y'
  '1/2+y,1/2-z,-x'
  '1/2-y,-z,1/2+x'
  '-y,1/2+z,1/2-x'
  'y,z,x'
  '-x,1/2+y,1/2-z'
  '1/2+x,1/2-y,-z'
  '1/2-x,-y,1/2+z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Ag1   0.39600   0.39600   0.39600
Ag2   0.23150   0.02330   0.25900
Ag3   0.34660   0.82460   0.98490
As   0.99730   0.99730   0.99730
S1   0.52980   0.52980   0.52980
S2   0.87640   0.87640   0.87640
S3   0.26320   0.26320   0.26320
S4   0.12210   0.87340   0.10750
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 0.04740 0.04740 0.04740 -0.01360 -0.01360 -0.01360
Ag2 0.06000 0.02850 0.05830 0.00270 -0.03120 -0.00500
Ag3 0.04950 0.03290 0.05460 0.00010 0.00150 0.00480
As 0.01410 0.01410 0.01410 0.00000 0.00000 0.00000
S1 0.02400 0.02400 0.02400 -0.00030 -0.00030 -0.00030
S2 0.02460 0.02460 0.02460 -0.00310 -0.00310 -0.00310
S3 0.02190 0.02190 0.02190 -0.00330 -0.00330 -0.00330
S4 0.02050 0.01760 0.02240 0.00190 -0.00230 0.00170