data_ZnCo2As
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.67
_cell_length_b   7.67
_cell_length_c   7.67
_cell_angle_alpha   21.11
_cell_angle_beta   21.11
_cell_angle_gamma   21.11
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ZnCo2As
_chemical_formula_sum   'Zn1 Co2 As1'
_cell_volume   51.29
_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
  Zn  Zn3  1  0.0  0.0  0.0  1.0
  Co  Co1  1  0.0  0.0  0.5  1.0
  Co  Co2  1  0.0  0.0  0.99  1.0
  As  As0  1  0.0  0.0  0.25  1.0

data_ZnCo2As
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.87
_cell_length_b   2.81
_cell_length_c   7.67
_cell_angle_alpha   90.0
_cell_angle_beta   102.21
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   ZnCo2As
_chemical_formula_sum   'Zn2 Co4 As2'
_cell_volume   102.58
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Zn  Zn0  2  0.0  0.0  0.0  1.0
  Co  Co1  2  0.0  0.0  0.01  1.0
  Co  Co2  2  0.0  0.0  0.5  1.0
  As  As3  2  0.0  0.0  0.75  1.0

Zn Co Co As
Co2ZnAs is Cyanogen Chloride-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Co2ZnAs clusters. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in a single-bond geometry to one As(1) atom. The Co(1)-As(1) bond length is 1.97 Å. In the second Co site, Co(2) is bonded in a single-bond geometry to one Zn(1) atom. The Co(2)-Zn(1) bond length is 0.07 Å. Zn(1) is bonded in a single-bond geometry to one Co(2) and one As(1) atom. The Zn(1)-As(1) bond length is 1.90 Å. As(1) is bonded in a linear geometry to one Co(1) and one Zn(1) atom.