The material described by UNi10Si2 crystallizes in the orthorhombic Immm space group. U(1) is bonded in a 8-coordinate geometry to two equivalent Ni(1), two equivalent Ni(2), four equivalent Ni(3), eight equivalent Ni(4), and four equivalent Si(1) atoms. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 8-coordinate geometry to one U(1), one Ni(1), two equivalent Ni(3), four equivalent Ni(2), four equivalent Ni(4), and two equivalent Si(1) atoms. In the second Ni site, Ni(2) is bonded in a 14-coordinate geometry to one U(1), one Ni(2), two equivalent Ni(3), four equivalent Ni(1), four equivalent Ni(4), and two equivalent Si(1) atoms. In the third Ni site, Ni(3) is bonded in a 13-coordinate geometry to two equivalent U(1), one Ni(3), two equivalent Ni(1), two equivalent Ni(2), four equivalent Ni(4), and two equivalent Si(1) atoms. In the fourth Ni site, Ni(4) is bonded to two equivalent U(1), two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(3), two equivalent Ni(4), and two equivalent Si(1) atoms to form distorted NiU2Si2Ni8 cuboctahedra that share corners with four equivalent Si(1)U2Ni10 cuboctahedra, corners with ten equivalent Ni(4)U2Si2Ni8 cuboctahedra, edges with two equivalent Si(1)U2Ni10 cuboctahedra, edges with four equivalent Ni(4)U2Si2Ni8 cuboctahedra, faces with four equivalent Si(1)U2Ni10 cuboctahedra, and faces with six equivalent Ni(4)U2Si2Ni8 cuboctahedra. Si(1) is bonded to two equivalent U(1), two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(3), and four equivalent Ni(4) atoms to form distorted SiU2Ni10 cuboctahedra that share corners with six equivalent Si(1)U2Ni10 cuboctahedra, corners with eight equivalent Ni(4)U2Si2Ni8 cuboctahedra, edges with three equivalent Si(1)U2Ni10 cuboctahedra, edges with four equivalent Ni(4)U2Si2Ni8 cuboctahedra,  a faceface with one Si(1)U2Ni10 cuboctahedra, and faces with eight equivalent Ni(4)U2Si2Ni8 cuboctahedra. is represented by the CIF file [CIF]
data_U(SiNi5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.173
_cell_length_b   6.173
_cell_length_c   6.173
_cell_angle_alpha   134.283
_cell_angle_beta   100.954
_cell_angle_gamma   96.418
_symmetry_Int_Tables_number   1
_cell_volume   155.032
_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
  U  U0  1  0.000  0.000  0.000  1.0
  Si  Si1  1  0.749  0.249  0.500  1.0
  Si  Si2  1  0.251  0.751  0.500  1.0
  Ni  Ni3  1  0.353  0.353  0.000  1.0
  Ni  Ni4  1  0.647  0.647  0.000  1.0
  Ni  Ni5  1  0.660  0.000  0.660  1.0
  Ni  Ni6  1  0.340  0.000  0.340  1.0
  Ni  Ni7  1  0.180  0.500  0.680  1.0
  Ni  Ni8  1  0.820  0.500  0.320  1.0
  Ni  Ni9  1  0.500  0.000  0.000  1.0
  Ni  Ni10  1  0.500  0.500  0.500  1.0
  Ni  Ni11  1  0.000  0.000  0.500  1.0
  Ni  Ni12  1  0.000  0.500  0.000  1.0
[/CIF]
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The material described by UNi10Si2 crystallizes in the orthorhombic Immm space group. U(1) is bonded in a 8-coordinate geometry to two equivalent Ni(1), two equivalent Ni(2), four equivalent Ni(3), eight equivalent Ni(4), and four equivalent Si(1) atoms. There are four inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 8-coordinate geometry to one U(1), one Ni(1), two equivalent Ni(3), four equivalent Ni(2), four equivalent Ni(4), and two equivalent Si(1) atoms. In the second Ni site, Ni(2) is bonded in a 14-coordinate geometry to one U(1), one Ni(2), two equivalent Ni(3), four equivalent Ni(1), four equivalent Ni(4), and two equivalent Si(1) atoms. In the third Ni site, Ni(3) is bonded in a 13-coordinate geometry to two equivalent U(1), one Ni(3), two equivalent Ni(1), two equivalent Ni(2), four equivalent Ni(4), and two equivalent Si(1) atoms. In the fourth Ni site, Ni(4) is bonded to two equivalent U(1), two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(3), two equivalent Ni(4), and two equivalent Si(1) atoms to form distorted NiU2Si2Ni8 cuboctahedra that share corners with four equivalent Si(1)U2Ni10 cuboctahedra, corners with ten equivalent Ni(4)U2Si2Ni8 cuboctahedra, edges with two equivalent Si(1)U2Ni10 cuboctahedra, edges with four equivalent Ni(4)U2Si2Ni8 cuboctahedra, faces with four equivalent Si(1)U2Ni10 cuboctahedra, and faces with six equivalent Ni(4)U2Si2Ni8 cuboctahedra. Si(1) is bonded to two equivalent U(1), two equivalent Ni(1), two equivalent Ni(2), two equivalent Ni(3), and four equivalent Ni(4) atoms to form distorted SiU2Ni10 cuboctahedra that share corners with six equivalent Si(1)U2Ni10 cuboctahedra, corners with eight equivalent Ni(4)U2Si2Ni8 cuboctahedra, edges with three equivalent Si(1)U2Ni10 cuboctahedra, edges with four equivalent Ni(4)U2Si2Ni8 cuboctahedra,  a faceface with one Si(1)U2Ni10 cuboctahedra, and faces with eight equivalent Ni(4)U2Si2Ni8 cuboctahedra. is represented by the CIF file [CIF]
data_U(SiNi5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.173
_cell_length_b   6.173
_cell_length_c   6.173
_cell_angle_alpha   134.283
_cell_angle_beta   100.954
_cell_angle_gamma   96.418
_symmetry_Int_Tables_number   1
_cell_volume   155.032
_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
  U  U0  1  0.000  0.000  0.000  1.0
  Si  Si1  1  0.749  0.249  0.500  1.0
  Si  Si2  1  0.251  0.751  0.500  1.0
  Ni  Ni3  1  0.353  0.353  0.000  1.0
  Ni  Ni4  1  0.647  0.647  0.000  1.0
  Ni  Ni5  1  0.660  0.000  0.660  1.0
  Ni  Ni6  1  0.340  0.000  0.340  1.0
  Ni  Ni7  1  0.180  0.500  0.680  1.0
  Ni  Ni8  1  0.820  0.500  0.320  1.0
  Ni  Ni9  1  0.500  0.000  0.000  1.0
  Ni  Ni10  1  0.500  0.500  0.500  1.0
  Ni  Ni11  1  0.000  0.000  0.500  1.0
  Ni  Ni12  1  0.000  0.500  0.000  1.0
[/CIF]
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