The material described by U3Si2 crystallizes in the tetragonal P4/mbm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. In the second U site, U(2) is bonded in a square co-planar geometry to four equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to two equivalent U(2), six equivalent U(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_U3Si2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.239
_cell_length_b   7.239
_cell_length_c   3.905
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   204.631
_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  0.816  0.684  0.500  1.0
  U  U1  1  0.316  0.816  0.500  1.0
  U  U2  1  0.184  0.316  0.500  1.0
  U  U3  1  0.684  0.184  0.500  1.0
  U  U4  1  0.500  0.500  0.000  1.0
  U  U5  1  0.000  0.000  0.000  1.0
  Si  Si6  1  0.885  0.385  0.000  1.0
  Si  Si7  1  0.385  0.115  0.000  1.0
  Si  Si8  1  0.615  0.885  0.000  1.0
  Si  Si9  1  0.115  0.615  0.000  1.0
[/CIF]
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The material described by U3Si2 crystallizes in the tetragonal P4/mbm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. In the second U site, U(2) is bonded in a square co-planar geometry to four equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to two equivalent U(2), six equivalent U(1), and one Si(1) atom. is represented by the CIF file [CIF]
data_U3Si2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.239
_cell_length_b   7.239
_cell_length_c   3.905
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   204.631
_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  0.816  0.684  0.500  1.0
  U  U1  1  0.316  0.816  0.500  1.0
  U  U2  1  0.184  0.316  0.500  1.0
  U  U3  1  0.684  0.184  0.500  1.0
  U  U4  1  0.500  0.500  0.000  1.0
  U  U5  1  0.000  0.000  0.000  1.0
  Si  Si6  1  0.885  0.385  0.000  1.0
  Si  Si7  1  0.385  0.115  0.000  1.0
  Si  Si8  1  0.615  0.885  0.000  1.0
  Si  Si9  1  0.115  0.615  0.000  1.0
[/CIF]
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