The structure described by U2W3Si4 crystallizes in the monoclinic P2_1/c space group. U(1) is bonded in a 11-coordinate geometry to two equivalent W(1), two equivalent W(2), three equivalent Si(1), and four equivalent Si(2) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 6-coordinate geometry to two equivalent U(1), three equivalent Si(1), and three equivalent Si(2) atoms. In the second W site, W(2) is bonded to four equivalent U(1), two equivalent Si(2), and four equivalent Si(1) atoms to form distorted edge-sharing WU4Si6 octahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to three equivalent U(1), two equivalent W(2), three equivalent W(1), and one Si(1) atom. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to four equivalent U(1), one W(2), three equivalent W(1), and one Si(2) atom. is represented by the CIF card [CIF]
data_U2Si4W3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.907
_cell_length_b   6.729
_cell_length_c   6.876
_cell_angle_alpha   70.509
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   301.244
_cell_formula_units_Z   2
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
  U  U0  1  0.666  0.442  0.188  1.0
  U  U1  1  0.166  0.058  0.812  1.0
  U  U2  1  0.334  0.558  0.812  1.0
  U  U3  1  0.834  0.942  0.188  1.0
  Si  Si4  1  0.867  0.131  0.502  1.0
  Si  Si5  1  0.367  0.369  0.498  1.0
  Si  Si6  1  0.133  0.869  0.498  1.0
  Si  Si7  1  0.633  0.631  0.502  1.0
  Si  Si8  1  0.543  0.871  0.910  1.0
  Si  Si9  1  0.043  0.629  0.090  1.0
  Si  Si10  1  0.957  0.371  0.910  1.0
  Si  Si11  1  0.457  0.129  0.090  1.0
  W  W12  1  0.664  0.253  0.755  1.0
  W  W13  1  0.164  0.247  0.245  1.0
  W  W14  1  0.500  0.000  0.500  1.0
  W  W15  1  0.000  0.500  0.500  1.0
  W  W16  1  0.336  0.747  0.245  1.0
  W  W17  1  0.836  0.753  0.755  1.0
[/CIF]
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The structure described by U2W3Si4 crystallizes in the monoclinic P2_1/c space group. U(1) is bonded in a 11-coordinate geometry to two equivalent W(1), two equivalent W(2), three equivalent Si(1), and four equivalent Si(2) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded in a 6-coordinate geometry to two equivalent U(1), three equivalent Si(1), and three equivalent Si(2) atoms. In the second W site, W(2) is bonded to four equivalent U(1), two equivalent Si(2), and four equivalent Si(1) atoms to form distorted edge-sharing WU4Si6 octahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to three equivalent U(1), two equivalent W(2), three equivalent W(1), and one Si(1) atom. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to four equivalent U(1), one W(2), three equivalent W(1), and one Si(2) atom. is represented by the CIF card [CIF]
data_U2Si4W3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.907
_cell_length_b   6.729
_cell_length_c   6.876
_cell_angle_alpha   70.509
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   301.244
_cell_formula_units_Z   2
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
  U  U0  1  0.666  0.442  0.188  1.0
  U  U1  1  0.166  0.058  0.812  1.0
  U  U2  1  0.334  0.558  0.812  1.0
  U  U3  1  0.834  0.942  0.188  1.0
  Si  Si4  1  0.867  0.131  0.502  1.0
  Si  Si5  1  0.367  0.369  0.498  1.0
  Si  Si6  1  0.133  0.869  0.498  1.0
  Si  Si7  1  0.633  0.631  0.502  1.0
  Si  Si8  1  0.543  0.871  0.910  1.0
  Si  Si9  1  0.043  0.629  0.090  1.0
  Si  Si10  1  0.957  0.371  0.910  1.0
  Si  Si11  1  0.457  0.129  0.090  1.0
  W  W12  1  0.664  0.253  0.755  1.0
  W  W13  1  0.164  0.247  0.245  1.0
  W  W14  1  0.500  0.000  0.500  1.0
  W  W15  1  0.000  0.500  0.500  1.0
  W  W16  1  0.336  0.747  0.245  1.0
  W  W17  1  0.836  0.753  0.755  1.0
[/CIF]
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