data_TiSn3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.16
_cell_length_b   5.16
_cell_length_c   5.16
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   TiSn3
_chemical_formula_sum   'Ti1 Sn3'
_cell_volume   97.24
_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  Ti3  1  0.0  0.0  0.0  1.0
  Sn  Sn0  1  0.82  0.82  0.82  1.0
  Sn  Sn1  1  0.65  0.65  0.65  1.0
  Sn  Sn2  1  0.47  0.47  0.47  1.0

data_TiSn3
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.16
_cell_length_b   5.16
_cell_length_c   12.64
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   TiSn3
_chemical_formula_sum   'Ti3 Sn9'
_cell_volume   291.71
_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
  Sn  Sn1  3  0.0  0.0  0.18  1.0
  Sn  Sn2  3  0.0  0.0  0.35  1.0
  Sn  Sn3  3  0.0  0.0  0.53  1.0

Ti Sn Sn Sn
TiSn3 crystallizes in the trigonal R3m space group. Ti(1) is bonded in a 1-coordinate geometry to one Sn(1), three equivalent Sn(2), and three equivalent Sn(3) atoms. The Ti(1)-Sn(1) bond length is 2.21 Å. All Ti(1)-Sn(2) bond lengths are 2.99 Å. All Ti(1)-Sn(3) bond lengths are 3.47 Å. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 2-coordinate geometry to one Ti(1), one Sn(2), and three equivalent Sn(3) atoms. The Sn(1)-Sn(2) bond length is 2.21 Å. All Sn(1)-Sn(3) bond lengths are 2.99 Å. In the second Sn site, Sn(2) is bonded to three equivalent Ti(1), one Sn(1), and one Sn(3) atom to form corner-sharing SnTi3Sn2 trigonal bipyramids. The Sn(2)-Sn(3) bond length is 2.21 Å. In the third Sn site, Sn(3) is bonded in a 7-coordinate geometry to three equivalent Ti(1), one Sn(2), and three equivalent Sn(1) atoms.