data_K3Cr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.29
_cell_length_b   13.29
_cell_length_c   13.29
_cell_angle_alpha   19.36
_cell_angle_beta   19.36
_cell_angle_gamma   19.36
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K3Cr
_chemical_formula_sum   'K3 Cr1'
_cell_volume   225.43
_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  K1  1  0.0  0.0  0.05  1.0
  K  K2  1  0.0  0.0  0.0  1.0
  K  K3  1  0.0  0.0  0.06  1.0
  Cr  Cr0  1  0.0  0.0  0.55  1.0

data_K3Cr
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.74
_cell_length_b   4.47
_cell_length_c   13.29
_cell_angle_alpha   90.0
_cell_angle_beta   101.2
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   K3Cr
_chemical_formula_sum   'K6 Cr2'
_cell_volume   450.87
_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
  K  K1  2  0.0  0.0  0.94  1.0
  K  K2  2  0.0  0.0  0.95  1.0
  Cr  Cr3  2  0.0  0.0  0.45  1.0

K K K Cr
K K K Cr 0 2 o o o 0 1 o o o 1 2 o o o 3 3 o + - 3 3 + - o 3 3 + o - 
(K)3Cr is Cyanogen Chloride-derived structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two 7440-47-3 atoms and two K clusters. In each K cluster, there are three inequivalent K sites. In the first K site, K(1) is bonded in a linear geometry to one K(2) and one K(3) atom. The K(1)-K(2) bond length is 0.64 Å. The K(1)-K(3) bond length is 0.11 Å. In the second K site, K(2) is bonded in a single-bond geometry to one K(1) atom. In the third K site, K(3) is bonded in a single-bond geometry to one K(1) atom.