data_KNbCr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.11
_cell_length_b   5.11
_cell_length_c   2.56
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KNbCr
_chemical_formula_sum   'K1 Nb1 Cr1'
_cell_volume   57.94
_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  0.83  1.0
  Nb  Nb2  1  0.55  0.47  0.6  1.0
  Cr  Cr0  1  1.0  0.95  0.13  1.0

data_KNbCr
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.56
_cell_length_b   5.11
_cell_length_c   5.11
_cell_angle_alpha   120.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KNbCr
_chemical_formula_sum   'K1 Nb1 Cr1'
_cell_volume   57.94
_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  K0  1  0.83  0.0  0.0  1.0
  Nb  Nb1  1  0.6  0.55  0.47  1.0
  Cr  Cr2  1  0.13  1.0  0.95  1.0

K Nb Cr
K Nb Cr 0 2 - - + 0 1 o o o 0 1 - - o 1 2 - - o 1 2 - - + 1 2 o o o 1 2 o o + 1 1 o o + 
KNbCr crystallizes in the triclinic P1 space group. K(1) is bonded in a 2-coordinate geometry to three equivalent Nb(1) and two equivalent Cr(1) atoms. There are a spread of K(1)-Nb(1) bond distances ranging from 2.57-4.11 Å. There is one shorter (0.81 Å) and one longer (1.81 Å) K(1)-Cr(1) bond length. Nb(1) is bonded in a 8-coordinate geometry to three equivalent K(1), two equivalent Nb(1), and three equivalent Cr(1) atoms. Both Nb(1)-Nb(1) bond lengths are 2.56 Å. There are a spread of Nb(1)-Cr(1) bond distances ranging from 2.65-3.01 Å. Cr(1) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1) and three equivalent Nb(1) atoms.