data_MnNiSn2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.66
_cell_length_b   4.66
_cell_length_c   3.16
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   91.52
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MnNiSn2
_chemical_formula_sum   'Mn1 Ni1 Sn2'
_cell_volume   68.47
_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
  Mn  Mn0  1  0.0  0.0  0.0  1.0
  Ni  Ni1  1  0.25  0.0  0.0  1.0
  Sn  Sn2  1  0.63  0.33  0.58  1.0
  Sn  Sn3  1  0.63  0.67  0.58  1.0

data_MnNiSn2
_symmetry_space_group_name_H-M   Pm
_cell_length_a   3.16
_cell_length_b   4.66
_cell_length_c   4.66
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   6
_chemical_formula_structural   MnNiSn2
_chemical_formula_sum   'Mn1 Ni1 Sn2'
_cell_volume   68.49
_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
  Mn  Mn0  1  0.0  0.0  0.0  1.0
  Ni  Ni1  1  -0.0  0.0  0.25  1.0
  Sn  Sn2  2  0.58  0.33  0.63  1.0

Mn Ni Sn Sn
MnNiSn2 crystallizes in the monoclinic Pm space group. Mn(1) is bonded in a distorted single-bond geometry to one Ni(1) and four equivalent Sn(1) atoms. The Mn(1)-Ni(1) bond length is 1.16 Å. There are two shorter (2.68 Å) and two longer (2.96 Å) Mn(1)-Sn(1) bond lengths. Ni(1) is bonded in a single-bond geometry to one Mn(1) and four equivalent Sn(1) atoms. There are two shorter (2.68 Å) and two longer (2.96 Å) Ni(1)-Sn(1) bond lengths. Sn(1) is bonded in a 5-coordinate geometry to two equivalent Mn(1), two equivalent Ni(1), and one Sn(1) atom. The Sn(1)-Sn(1) bond length is 1.57 Å.