data_La2TaSn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.79
_cell_length_b   4.79
_cell_length_c   4.7
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   La2TaSn
_chemical_formula_sum   'La2 Ta1 Sn1'
_cell_volume   107.94
_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
  La  La0  1  0.4  0.0  0.35  1.0
  La  La1  1  0.0  0.4  0.35  1.0
  Ta  Ta3  1  0.4  0.4  0.0  1.0
  Sn  Sn2  1  0.0  0.0  0.0  1.0

data_La2TaSn
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.78
_cell_length_b   6.78
_cell_length_c   4.7
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   La2TaSn
_chemical_formula_sum   'La4 Ta2 Sn2'
_cell_volume   215.88
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  La  La0  4  0.2  0.2  0.35  1.0
  Ta  Ta1  2  0.4  0.0  0.0  1.0
  Sn  Sn2  2  0.0  0.0  0.0  1.0

La La Ta Sn
La2TaSn crystallizes in the monoclinic Cm space group. La(1) is bonded in a 2-coordinate geometry to one Ta(1) and three equivalent Sn(1) atoms. The La(1)-Ta(1) bond length is 2.51 Å. There are a spread of La(1)-Sn(1) bond distances ranging from 2.51-3.59 Å. Ta(1) is bonded in a 3-coordinate geometry to two equivalent La(1) and three equivalent Sn(1) atoms. There is one shorter (2.68 Å) and two longer (3.46 Å) Ta(1)-Sn(1) bond lengths. Sn(1) is bonded in a 9-coordinate geometry to six equivalent La(1) and three equivalent Ta(1) atoms.