data_Cd2As
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.03
_cell_length_b   6.05
_cell_length_c   4.3
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cd2As
_chemical_formula_sum   'Cd4 As2'
_cell_volume   157.23
_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
  Cd  Cd2  1  0.33  0.6  0.0  1.0
  Cd  Cd3  1  0.7  0.45  0.0  1.0
  Cd  Cd4  1  0.35  0.48  0.15  1.0
  Cd  Cd5  1  0.68  0.57  0.15  1.0
  As  As0  1  0.0  0.0  0.0  1.0
  As  As1  1  0.02  0.03  0.15  1.0

data_Cd2As
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.3
_cell_length_b   6.03
_cell_length_c   6.05
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cd2As
_chemical_formula_sum   'Cd4 As2'
_cell_volume   157.23
_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
  Cd  Cd0  1  0.0  0.33  0.6  1.0
  Cd  Cd1  1  0.0  0.7  0.45  1.0
  Cd  Cd2  1  0.15  0.35  0.48  1.0
  Cd  Cd3  1  0.15  0.68  0.57  1.0
  As  As4  1  0.0  0.0  0.0  1.0
  As  As5  1  0.15  0.02  0.03  1.0

Cd Cd Cd Cd As As
(Cd)2As crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one diarsene molecule and two Cd clusters. In each Cd cluster, there are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a distorted single-bond geometry to one Cd(3) atom. The Cd(1)-Cd(3) bond length is 0.98 Å. In the second Cd site, Cd(3) is bonded in a single-bond geometry to one Cd(1) atom.