data_CrSn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.08
_cell_length_b   3.08
_cell_length_c   9.15
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CrSn
_chemical_formula_sum   'Cr2 Sn2'
_cell_volume   75.18
_cell_formula_units_Z   2
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
  Cr  Cr0  1  0.54  0.89  0.43  1.0
  Cr  Cr1  1  0.0  0.78  0.71  1.0
  Sn  Sn2  1  0.54  0.89  0.04  1.0
  Sn  Sn3  1  0.0  0.78  0.11  1.0

data_CrSn
_symmetry_space_group_name_H-M   C2/m
_cell_length_a   5.34
_cell_length_b   3.08
_cell_length_c   9.15
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   12
_chemical_formula_structural   CrSn
_chemical_formula_sum   'Cr4 Sn4'
_cell_volume   150.36
_cell_formula_units_Z   4
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-x, -y, -z'
  3  '-x, y, -z'
  4  'x, -y, z'
  5  'x+1/2, y+1/2, z'
  6  '-x+1/2, -y+1/2, -z'
  7  '-x+1/2, y+1/2, -z'
  8  '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
  Cr  Cr0  4  0.23  0.5  0.64  1.0
  Sn  Sn1  4  0.23  0.5  0.03  1.0

Cr Cr Sn Sn
Cr Cr Sn Sn 0 3 o o o 0 3 + o o 0 1 o o o 0 1 + o o 0 1 + + o 0 0 + + o 0 0 o + o 0 0 + o o 0 2 o o o 1 1 + + o 1 1 o + o 1 1 + o o 1 2 - o + 1 2 o o + 1 3 o o + 2 3 o o o 2 3 + o o 
SnCr crystallizes in the triclinic P-1 space group. Cr(1) is bonded in a 10-coordinate geometry to eight equivalent Cr(1) and two equivalent Sn(1) atoms. There are a spread of Cr(1)-Cr(1) bond distances ranging from 3.01-3.08 Å. There is one shorter (3.34 Å) and one longer (3.38 Å) Cr(1)-Sn(1) bond length. Sn(1) is bonded in a 2-coordinate geometry to two equivalent Cr(1) and two equivalent Sn(1) atoms. There is one shorter (1.64 Å) and one longer (1.72 Å) Sn(1)-Sn(1) bond length.