data_K3Cr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.28
_cell_length_b   4.28
_cell_length_c   11.76
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   91.73
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K3Cr
_chemical_formula_sum   'K3 Cr1'
_cell_volume   215.51
_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  0.98  0.0  0.72  1.0
  K  K2  1  0.0  0.0  0.0  1.0
  K  K3  1  0.98  0.0  0.04  1.0
  Cr  Cr0  1  0.0  0.0  0.88  1.0

data_K3Cr
_symmetry_space_group_name_H-M   Pm
_cell_length_a   4.28
_cell_length_b   4.28
_cell_length_c   11.76
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   6
_chemical_formula_structural   K3Cr
_chemical_formula_sum   'K3 Cr1'
_cell_volume   215.61
_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
  K  K0  1  0.0  0.0  0.0  1.0
  K  K1  1  0.98  0.0  0.04  1.0
  K  K2  1  0.98  0.0  0.72  1.0
  Cr  Cr3  1  0.0  0.0  0.88  1.0

K K K Cr
K K K Cr 0 3 + o o 1 2 - o o 1 3 o o - 