The material structure described by Ag2Se crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a linear geometry to two equivalent Se(1) atoms. In the second Ag site, Ag(2) is bonded in a 3-coordinate geometry to three equivalent Se(1) atoms. Se(1) is bonded in a 5-coordinate geometry to two equivalent Ag(1) and three equivalent Ag(2) atoms. is represented by the CIF file [CIF]
data_Ag2Se
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.970
_cell_length_b   7.147
_cell_length_c   7.774
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   276.164
_cell_formula_units_Z   4
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  0.250  0.258  0.974  1.0
  Ag  Ag1  1  0.750  0.742  0.026  1.0
  Ag  Ag2  1  0.250  0.614  0.211  1.0
  Ag  Ag3  1  0.750  0.758  0.526  1.0
  Ag  Ag4  1  0.750  0.114  0.289  1.0
  Ag  Ag5  1  0.750  0.386  0.789  1.0
  Ag  Ag6  1  0.250  0.886  0.711  1.0
  Ag  Ag7  1  0.250  0.242  0.474  1.0
  Se  Se8  1  0.750  0.515  0.284  1.0
  Se  Se9  1  0.750  0.985  0.784  1.0
  Se  Se10  1  0.250  0.015  0.216  1.0
  Se  Se11  1  0.250  0.485  0.716  1.0
[/CIF]
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The material structure described by Ag2Se crystallizes in the orthorhombic Pnma space group. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a linear geometry to two equivalent Se(1) atoms. In the second Ag site, Ag(2) is bonded in a 3-coordinate geometry to three equivalent Se(1) atoms. Se(1) is bonded in a 5-coordinate geometry to two equivalent Ag(1) and three equivalent Ag(2) atoms. is represented by the CIF file [CIF]
data_Ag2Se
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.970
_cell_length_b   7.147
_cell_length_c   7.774
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   276.164
_cell_formula_units_Z   4
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  0.250  0.258  0.974  1.0
  Ag  Ag1  1  0.750  0.742  0.026  1.0
  Ag  Ag2  1  0.250  0.614  0.211  1.0
  Ag  Ag3  1  0.750  0.758  0.526  1.0
  Ag  Ag4  1  0.750  0.114  0.289  1.0
  Ag  Ag5  1  0.750  0.386  0.789  1.0
  Ag  Ag6  1  0.250  0.886  0.711  1.0
  Ag  Ag7  1  0.250  0.242  0.474  1.0
  Se  Se8  1  0.750  0.515  0.284  1.0
  Se  Se9  1  0.750  0.985  0.784  1.0
  Se  Se10  1  0.250  0.015  0.216  1.0
  Se  Se11  1  0.250  0.485  0.716  1.0
[/CIF]
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