data_Ta2TcW
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.21
_cell_length_b   3.21
_cell_length_c   6.45
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2TcW
_chemical_formula_sum   'Ta2 Tc1 W1'
_cell_volume   66.59
_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
  Ta  Ta0  1  0.61  0.61  0.86  1.0
  Ta  Ta1  1  0.61  0.61  0.59  1.0
  Tc  Tc2  1  0.0  0.0  0.0  1.0
  W  W3  1  0.0  0.0  0.23  1.0

data_Ta2TcW
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.54
_cell_length_b   4.54
_cell_length_c   6.45
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Ta2TcW
_chemical_formula_sum   'Ta4 Tc2 W2'
_cell_volume   133.18
_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
  Ta  Ta0  2  0.11  0.5  0.59  1.0
  Ta  Ta1  2  0.11  0.5  0.86  1.0
  Tc  Tc2  2  0.0  0.0  0.0  1.0
  W  W3  2  0.0  0.0  0.23  1.0

Ta Ta Tc W
Ta2WTc crystallizes in the monoclinic Cm space group. There are two inequivalent Ta sites. In the first Ta site, Ta(1) is bonded in a 5-coordinate geometry to one Ta(2) and four equivalent Tc(1) atoms. The Ta(1)-Ta(2) bond length is 1.73 Å. There are a spread of Ta(1)-Tc(1) bond distances ranging from 2.01-2.90 Å. In the second Ta site, Ta(2) is bonded in a 2-coordinate geometry to one Ta(1) and one W(1) atom. The Ta(2)-W(1) bond length is 2.96 Å. W(1) is bonded in a single-bond geometry to one Ta(2) and one Tc(1) atom. The W(1)-Tc(1) bond length is 1.46 Å. Tc(1) is bonded in a 2-coordinate geometry to four equivalent Ta(1) and one W(1) atom.