data_LaTlW
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.13
_cell_length_b   5.13
_cell_length_c   5.13
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   LaTlW
_chemical_formula_sum   'La1 Tl1 W1'
_cell_volume   95.42
_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  0.0  0.0  0.0  1.0
  Tl  Tl1  1  0.81  0.81  0.81  1.0
  W  W2  1  0.44  0.44  0.44  1.0

data_LaTlW
_symmetry_space_group_name_H-M   R3m
_cell_length_a   5.13
_cell_length_b   5.13
_cell_length_c   12.56
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   LaTlW
_chemical_formula_sum   'La3 Tl3 W3'
_cell_volume   286.25
_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
  La  La0  3  0.0  0.0  0.0  1.0
  Tl  Tl1  3  0.0  0.0  0.19  1.0
  W  W2  3  0.0  0.0  0.56  1.0

La Tl W
La Tl W 0 1 - - - 0 2 o o - 0 2 o - o 0 2 - o o 1 2 + o o 1 2 o + o 1 2 o o + 
LaWTl is half-Heusler structured and crystallizes in the trigonal R3m space group. La(1) is bonded in a 4-coordinate geometry to three equivalent W(1) and four equivalent Tl(1) atoms. All La(1)-W(1) bond lengths are 3.25 Å. There is one shorter (2.34 Å) and three longer (3.49 Å) La(1)-Tl(1) bond lengths. W(1) is bonded in a distorted hexagonal planar geometry to three equivalent La(1) and three equivalent Tl(1) atoms. All W(1)-Tl(1) bond lengths are 3.00 Å. Tl(1) is bonded in a 7-coordinate geometry to four equivalent La(1) and three equivalent W(1) atoms.