data_MnNi2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.46
_cell_length_b   4.46
_cell_length_c   2.81
_cell_angle_alpha   90.85
_cell_angle_beta   90.85
_cell_angle_gamma   108.08
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MnNi2Sn
_chemical_formula_sum   'Mn1 Ni2 Sn1'
_cell_volume   53.23
_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  0.27  0.81  0.41  1.0
  Ni  Ni2  1  0.27  0.19  0.41  1.0
  Sn  Sn3  1  0.62  0.0  0.0  1.0

data_MnNi2Sn
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.81
_cell_length_b   4.46
_cell_length_c   4.46
_cell_angle_alpha   108.08
_cell_angle_beta   90.85
_cell_angle_gamma   90.85
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MnNi2Sn
_chemical_formula_sum   'Mn1 Ni2 Sn1'
_cell_volume   53.23
_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  0.41  0.27  0.19  1.0
  Ni  Ni2  1  0.41  0.27  0.81  1.0
  Sn  Sn3  1  -0.0  0.62  0.0  1.0

Mn Ni Ni Sn
Ni2MnSn crystallizes in the triclinic P1 space group. Mn(1) is bonded in a 5-coordinate geometry to two equivalent Ni(1), two equivalent Ni(2), and one Sn(1) atom. There is one shorter (2.05 Å) and one longer (2.39 Å) Mn(1)-Ni(1) bond length. There is one shorter (1.68 Å) and one longer (2.12 Å) Mn(1)-Ni(2) bond length. The Mn(1)-Sn(1) bond length is 1.69 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 6-coordinate geometry to two equivalent Mn(1), two equivalent Ni(2), and two equivalent Sn(1) atoms. There is one shorter (1.73 Å) and one longer (2.73 Å) Ni(1)-Ni(2) bond length. There is one shorter (1.92 Å) and one longer (2.23 Å) Ni(1)-Sn(1) bond length. In the second Ni site, Ni(2) is bonded in a 3-coordinate geometry to two equivalent Mn(1) and two equivalent Ni(1) atoms. Sn(1) is bonded in a 1-coordinate geometry to one Mn(1) and two equivalent Ni(1) atoms.