The material structure described by Ag2Se crystallizes in the orthorhombic Pmma space group. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 7-coordinate geometry to two equivalent Ag(1), two equivalent Ag(2), and three equivalent Se(1) atoms. In the second Ag site, Ag(2) is bonded in a 10-coordinate geometry to two equivalent Ag(1), two equivalent Ag(2), and six equivalent Se(1) atoms. Se(1) is bonded in a 9-coordinate geometry to three equivalent Ag(1) and six equivalent Ag(2) atoms. is represented by the CIF file [CIF]
data_Ag2Se
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.969
_cell_length_b   4.582
_cell_length_c   7.348
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   133.639
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ag  Ag0  1  0.500  0.000  0.103  1.0
  Ag  Ag1  1  0.000  0.500  0.612  1.0
  Ag  Ag2  1  0.500  0.500  0.897  1.0
  Ag  Ag3  1  0.000  0.000  0.388  1.0
  Se  Se4  1  0.500  0.500  0.294  1.0
  Se  Se5  1  0.500  0.000  0.706  1.0
[/CIF]
.
The material structure described by Ag2Se crystallizes in the orthorhombic Pmma space group. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 7-coordinate geometry to two equivalent Ag(1), two equivalent Ag(2), and three equivalent Se(1) atoms. In the second Ag site, Ag(2) is bonded in a 10-coordinate geometry to two equivalent Ag(1), two equivalent Ag(2), and six equivalent Se(1) atoms. Se(1) is bonded in a 9-coordinate geometry to three equivalent Ag(1) and six equivalent Ag(2) atoms. is represented by the CIF file [CIF]
data_Ag2Se
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.969
_cell_length_b   4.582
_cell_length_c   7.348
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   133.639
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ag  Ag0  1  0.500  0.000  0.103  1.0
  Ag  Ag1  1  0.000  0.500  0.612  1.0
  Ag  Ag2  1  0.500  0.500  0.897  1.0
  Ag  Ag3  1  0.000  0.000  0.388  1.0
  Se  Se4  1  0.500  0.500  0.294  1.0
  Se  Se5  1  0.500  0.000  0.706  1.0
[/CIF]
.