data_K(CoAs)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.32
_cell_length_b   7.32
_cell_length_c   7.32
_cell_angle_alpha   150.05
_cell_angle_beta   150.05
_cell_angle_gamma   42.88
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K(CoAs)2
_chemical_formula_sum   'K1 Co2 As2'
_cell_volume   97.53
_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
  K  K4  1  0.0  0.0  0.0  1.0
  Co  Co2  1  0.89  0.0  0.41  1.0
  Co  Co3  1  0.0  0.89  0.41  1.0
  As  As0  1  0.0  0.0  0.73  1.0
  As  As1  1  0.0  0.0  0.89  1.0

data_K(CoAs)2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.35
_cell_length_b   5.35
_cell_length_c   7.32
_cell_angle_alpha   90.0
_cell_angle_beta   111.44
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   K(CoAs)2
_chemical_formula_sum   'K2 Co4 As4'
_cell_volume   195.06
_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
  K  K0  2  0.0  0.0  0.0  1.0
  Co  Co1  4  0.45  0.45  0.49  1.0
  As  As2  2  0.0  0.0  0.11  1.0
  As  As3  2  0.0  0.0  0.27  1.0

K Co Co As As
K(CoAs)2 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two K(CoAs)2 clusters. K(1) is bonded in a single-bond geometry to one As(2) atom. The K(1)-As(2) bond length is 0.78 Å. Co(1) is bonded in a 2-coordinate geometry to one Co(1) and one As(1) atom. The Co(1)-Co(1) bond length is 0.58 Å. The Co(1)-As(1) bond length is 1.75 Å. There are two inequivalent As sites. In the first As site, As(1) is bonded in a 3-coordinate geometry to two equivalent Co(1) and one As(2) atom. The As(1)-As(2) bond length is 1.18 Å. In the second As site, As(2) is bonded in a single-bond geometry to one K(1) and one As(1) atom.