data_Ti2MnSn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.49
_cell_length_b   4.49
_cell_length_c   4.49
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ti2MnSn
_chemical_formula_sum   'Ti2 Mn1 Sn1'
_cell_volume   64.12
_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
  Ti  Ti0  1  0.0  0.0  0.0  1.0
  Ti  Ti1  1  0.77  0.77  0.77  1.0
  Mn  Mn2  1  0.18  0.18  0.18  1.0
  Sn  Sn3  1  0.59  0.59  0.59  1.0

data_Ti2MnSn
_symmetry_space_group_name_H-M   R3m
_cell_length_a   4.49
_cell_length_b   4.49
_cell_length_c   11.0
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Ti2MnSn
_chemical_formula_sum   'Ti6 Mn3 Sn3'
_cell_volume   192.35
_cell_formula_units_Z   3
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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
  Ti  Ti0  3  0.0  0.0  0.0  1.0
  Ti  Ti1  3  0.0  0.0  0.23  1.0
  Mn  Mn2  3  0.0  0.0  0.82  1.0
  Sn  Sn3  3  0.0  0.0  0.41  1.0

Ti Ti Mn Sn
Ti2MnSn crystallizes in the trigonal R3m space group. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a 5-coordinate geometry to one Ti(2), one Mn(1), and three equivalent Sn(1) atoms. The Ti(1)-Ti(2) bond length is 2.58 Å. The Ti(1)-Mn(1) bond length is 1.95 Å. All Ti(1)-Sn(1) bond lengths are 2.73 Å. In the second Ti site, Ti(2) is bonded in a single-bond geometry to one Ti(1) and one Sn(1) atom. The Ti(2)-Sn(1) bond length is 1.95 Å. Mn(1) is bonded to one Ti(1) and three equivalent Sn(1) atoms to form distorted corner-sharing MnTiSn3 tetrahedra. All Mn(1)-Sn(1) bond lengths are 2.73 Å. Sn(1) is bonded in a distorted single-bond geometry to one Ti(2), three equivalent Ti(1), and three equivalent Mn(1) atoms.