The compound described by USiSe crystallizes in the tetragonal I4/mmm space group. U(1) is bonded in a 9-coordinate geometry to four equivalent Si(1) and five equivalent Se(1) atoms. Si(1) is bonded in a distorted body-centered cubic geometry to four equivalent U(1) and four equivalent Si(1) atoms. Se(1) is bonded to five equivalent U(1) atoms to form a mixture of distorted edge and corner-sharing SeU5 trigonal bipyramids. is represented by the CIF card [CIF]
data_USiSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.739
_cell_length_b   8.739
_cell_length_c   8.739
_cell_angle_alpha   154.320
_cell_angle_beta   154.320
_cell_angle_gamma   36.635
_symmetry_Int_Tables_number   1
_cell_volume   125.166
_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  0.868  0.868  0.000  1.0
  U  U1  1  0.132  0.132  0.000  1.0
  Si  Si2  1  0.000  0.500  0.500  1.0
  Si  Si3  1  0.500  0.000  0.500  1.0
  Se  Se4  1  0.684  0.684  0.000  1.0
  Se  Se5  1  0.316  0.316  0.000  1.0
[/CIF]
.
The compound described by USiSe crystallizes in the tetragonal I4/mmm space group. U(1) is bonded in a 9-coordinate geometry to four equivalent Si(1) and five equivalent Se(1) atoms. Si(1) is bonded in a distorted body-centered cubic geometry to four equivalent U(1) and four equivalent Si(1) atoms. Se(1) is bonded to five equivalent U(1) atoms to form a mixture of distorted edge and corner-sharing SeU5 trigonal bipyramids. is represented by the CIF card [CIF]
data_USiSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.739
_cell_length_b   8.739
_cell_length_c   8.739
_cell_angle_alpha   154.320
_cell_angle_beta   154.320
_cell_angle_gamma   36.635
_symmetry_Int_Tables_number   1
_cell_volume   125.166
_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  0.868  0.868  0.000  1.0
  U  U1  1  0.132  0.132  0.000  1.0
  Si  Si2  1  0.000  0.500  0.500  1.0
  Si  Si3  1  0.500  0.000  0.500  1.0
  Se  Se4  1  0.684  0.684  0.000  1.0
  Se  Se5  1  0.316  0.316  0.000  1.0
[/CIF]
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