data_AgAsSe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.24
_cell_length_b   4.93
_cell_length_c   5.01
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   AgAsSe2
_chemical_formula_sum   'Ag1 As1 Se2'
_cell_volume   79.91
_cell_formula_units_Z   1
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  0.62  0.46  0.0  1.0
  As  As1  1  0.0  0.0  0.0  1.0
  Se  Se2  1  0.0  0.46  0.51  1.0
  Se  Se3  1  0.62  0.0  0.51  1.0

data_AgAsSe2
_symmetry_space_group_name_H-M   Pm
_cell_length_a   3.24
_cell_length_b   5.01
_cell_length_c   4.93
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   6
_chemical_formula_structural   AgAsSe2
_chemical_formula_sum   'Ag1 As1 Se2'
_cell_volume   79.91
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '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  0.62  0.0  0.46  1.0
  As  As1  1  0.0  0.0  0.0  1.0
  Se  Se2  1  0.0  0.5  0.46  1.0
  Se  Se3  1  0.62  0.5  0.0  1.0

Ag As Se Se
AgAsSe2 crystallizes in the triclinic P1 space group. Ag(1) is bonded in a 7-coordinate geometry to three equivalent As(1) and four equivalent Se(1) atoms. There are a spread of Ag(1)-As(1) bond distances ranging from 2.59-3.03 Å. There are a spread of Ag(1)-Se(1) bond distances ranging from 2.76-3.24 Å. As(1) is bonded in a 5-coordinate geometry to three equivalent Ag(1) and two equivalent Se(2) atoms. There is one shorter (2.76 Å) and one longer (2.83 Å) As(1)-Se(2) bond length. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 2-coordinate geometry to four equivalent Ag(1) atoms. In the second Se site, Se(2) is bonded in a 2-coordinate geometry to two equivalent As(1) atoms.