The material structure described by U3Si is beta Cu3Ti-like structured and crystallizes in the monoclinic C2/m space group. There are three inequivalent U sites. In the first U site, U(1) is bonded in a 12-coordinate geometry to four equivalent U(2), four equivalent U(3), and four equivalent Si(1) atoms. In the second U site, U(2) is bonded in a 12-coordinate geometry to four equivalent U(1), four equivalent U(3), and four equivalent Si(1) atoms. In the third U site, U(3) is bonded in a 12-coordinate geometry to four equivalent U(1), four equivalent U(2), and four equivalent Si(1) atoms. Si(1) is bonded to four equivalent U(1), four equivalent U(2), and four equivalent U(3) atoms to form a mixture of face and corner-sharing SiU12 cuboctahedra. is represented by the CIF file [CIF]
data_U3Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.996
_cell_length_b   5.996
_cell_length_c   5.994
_cell_angle_alpha   119.979
_cell_angle_beta   119.979
_cell_angle_gamma   90.012
_symmetry_Int_Tables_number   1
_cell_volume   152.436
_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  0.714  0.715  0.000  1.0
  U  U1  1  0.286  0.285  1.000  1.0
  U  U2  1  0.233  0.768  1.000  1.0
  U  U3  1  0.767  0.232  0.000  1.0
  U  U4  1  0.234  0.234  0.469  1.0
  U  U5  1  0.766  0.766  0.531  1.0
  Si  Si6  1  0.249  0.749  0.499  1.0
  Si  Si7  1  0.751  0.251  0.501  1.0
[/CIF]
.
The material structure described by U3Si is beta Cu3Ti-like structured and crystallizes in the monoclinic C2/m space group. There are three inequivalent U sites. In the first U site, U(1) is bonded in a 12-coordinate geometry to four equivalent U(2), four equivalent U(3), and four equivalent Si(1) atoms. In the second U site, U(2) is bonded in a 12-coordinate geometry to four equivalent U(1), four equivalent U(3), and four equivalent Si(1) atoms. In the third U site, U(3) is bonded in a 12-coordinate geometry to four equivalent U(1), four equivalent U(2), and four equivalent Si(1) atoms. Si(1) is bonded to four equivalent U(1), four equivalent U(2), and four equivalent U(3) atoms to form a mixture of face and corner-sharing SiU12 cuboctahedra. is represented by the CIF file [CIF]
data_U3Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.996
_cell_length_b   5.996
_cell_length_c   5.994
_cell_angle_alpha   119.979
_cell_angle_beta   119.979
_cell_angle_gamma   90.012
_symmetry_Int_Tables_number   1
_cell_volume   152.436
_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  0.714  0.715  0.000  1.0
  U  U1  1  0.286  0.285  1.000  1.0
  U  U2  1  0.233  0.768  1.000  1.0
  U  U3  1  0.767  0.232  0.000  1.0
  U  U4  1  0.234  0.234  0.469  1.0
  U  U5  1  0.766  0.766  0.531  1.0
  Si  Si6  1  0.249  0.749  0.499  1.0
  Si  Si7  1  0.751  0.251  0.501  1.0
[/CIF]
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