data_LiSnTe
_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   LiSnTe
_chemical_formula_sum   'Li1 Sn1 Te1'
_cell_volume   96.92
_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
  Li  Li0  1  0.0  0.0  0.0  1.0
  Sn  Sn1  1  0.65  0.65  0.65  1.0
  Te  Te2  1  0.82  0.82  0.82  1.0

data_LiSnTe
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.16
_cell_length_b   5.16
_cell_length_c   12.63
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   LiSnTe
_chemical_formula_sum   'Li3 Sn3 Te3'
_cell_volume   290.75
_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
  Li  Li0  3  0.0  0.0  0.0  1.0
  Sn  Sn1  3  0.0  0.0  0.35  1.0
  Te  Te2  3  0.0  0.0  0.18  1.0

Li Sn Te
LiSnTe is half-Heusler structured and crystallizes in the trigonal R3m space group. Li(1) is bonded to three equivalent Sn(1) and one Te(1) atom to form distorted LiSn3Te trigonal pyramids that share  a cornercorner with one Sn(1)Li3Te trigonal pyramid and corners with six equivalent Li(1)Sn3Te trigonal pyramids. All Li(1)-Sn(1) bond lengths are 2.99 Å. The Li(1)-Te(1) bond length is 2.24 Å. Sn(1) is bonded to three equivalent Li(1) and one Te(1) atom to form SnLi3Te trigonal pyramids that share  a cornercorner with one Li(1)Sn3Te trigonal pyramid and corners with six equivalent Sn(1)Li3Te trigonal pyramids. The Sn(1)-Te(1) bond length is 2.24 Å. Te(1) is bonded in a linear geometry to one Li(1) and one Sn(1) atom.