data_Zn2CoSn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.99
_cell_length_b   4.99
_cell_length_c   4.99
_cell_angle_alpha   135.09
_cell_angle_beta   135.09
_cell_angle_gamma   65.4
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Zn2CoSn
_chemical_formula_sum   'Zn2 Co1 Sn1'
_cell_volume   61.04
_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
  Zn  Zn2  1  0.0  0.91  0.1  1.0
  Zn  Zn3  1  0.91  0.0  0.1  1.0
  Co  Co0  1  0.0  0.0  0.0  1.0
  Sn  Sn1  1  0.0  0.0  0.2  1.0

data_Zn2CoSn
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.39
_cell_length_b   5.39
_cell_length_c   4.99
_cell_angle_alpha   90.0
_cell_angle_beta   122.7
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Zn2CoSn
_chemical_formula_sum   'Zn4 Co2 Sn2'
_cell_volume   122.08
_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
  Zn  Zn0  4  0.35  0.45  0.81  1.0
  Co  Co1  2  0.0  0.0  0.0  1.0
  Sn  Sn2  2  0.3  0.5  0.8  1.0

Zn Zn Co Sn
CoZn2Sn is Indium-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two CoZn2Sn clusters. Co(1) is bonded in a 2-coordinate geometry to two equivalent Zn(1) atoms. Both Co(1)-Zn(1) bond lengths are 0.89 Å. Zn(1) is bonded in a distorted single-bond geometry to one Co(1) and one Sn(1) atom. The Zn(1)-Sn(1) bond length is 0.37 Å. Sn(1) is bonded in an L-shaped geometry to two equivalent Zn(1) atoms.