The material structure described by U2PtSi3 is hexagonal omega structure-derived structured and crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent U sites. In the first U site, U(1) is bonded to two equivalent Pt(1), two equivalent Si(3), four equivalent Si(1), and four equivalent Si(2) atoms to form USi10Pt2 cuboctahedra that share edges with four equivalent U(1)Si10Pt2 cuboctahedra, edges with eight equivalent U(2)Si8Pt4 cuboctahedra, faces with four equivalent U(1)Si10Pt2 cuboctahedra, and faces with four equivalent U(2)Si8Pt4 cuboctahedra. In the second U site, U(2) is bonded to four equivalent Pt(1), two equivalent Si(1), two equivalent Si(2), and four equivalent Si(3) atoms to form USi8Pt4 cuboctahedra that share edges with four equivalent U(2)Si8Pt4 cuboctahedra, edges with eight equivalent U(1)Si10Pt2 cuboctahedra, faces with four equivalent U(1)Si10Pt2 cuboctahedra, and faces with four equivalent U(2)Si8Pt4 cuboctahedra. Pt(1) is bonded in a distorted trigonal planar geometry to two equivalent U(1), four equivalent U(2), one Si(3), and two equivalent Si(2) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent U(2), four equivalent U(1), one Si(2), and two equivalent Si(3) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent U(2), four equivalent U(1), two equivalent Pt(1), and one Si(1) atom. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent U(1), four equivalent U(2), one Pt(1), and two equivalent Si(1) atoms. is represented by the CIF card [CIF]
data_U2Si3Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.005
_cell_length_b   4.153
_cell_length_c   7.056
_cell_angle_alpha   90.002
_cell_angle_beta   90.000
_cell_angle_gamma   89.942
_symmetry_Int_Tables_number   1
_cell_volume   117.336
_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  1.000  1.000  0.992  1.0
  U  U1  1  1.000  0.500  0.509  1.0
  Si  Si2  1  0.500  0.500  0.834  1.0
  Si  Si3  1  0.500  0.500  0.164  1.0
  Si  Si4  1  0.500  1.000  0.670  1.0
  Pt  Pt5  1  0.500  1.000  0.331  1.0
[/CIF]
.
The material structure described by U2PtSi3 is hexagonal omega structure-derived structured and crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent U sites. In the first U site, U(1) is bonded to two equivalent Pt(1), two equivalent Si(3), four equivalent Si(1), and four equivalent Si(2) atoms to form USi10Pt2 cuboctahedra that share edges with four equivalent U(1)Si10Pt2 cuboctahedra, edges with eight equivalent U(2)Si8Pt4 cuboctahedra, faces with four equivalent U(1)Si10Pt2 cuboctahedra, and faces with four equivalent U(2)Si8Pt4 cuboctahedra. In the second U site, U(2) is bonded to four equivalent Pt(1), two equivalent Si(1), two equivalent Si(2), and four equivalent Si(3) atoms to form USi8Pt4 cuboctahedra that share edges with four equivalent U(2)Si8Pt4 cuboctahedra, edges with eight equivalent U(1)Si10Pt2 cuboctahedra, faces with four equivalent U(1)Si10Pt2 cuboctahedra, and faces with four equivalent U(2)Si8Pt4 cuboctahedra. Pt(1) is bonded in a distorted trigonal planar geometry to two equivalent U(1), four equivalent U(2), one Si(3), and two equivalent Si(2) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent U(2), four equivalent U(1), one Si(2), and two equivalent Si(3) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent U(2), four equivalent U(1), two equivalent Pt(1), and one Si(1) atom. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to two equivalent U(1), four equivalent U(2), one Pt(1), and two equivalent Si(1) atoms. is represented by the CIF card [CIF]
data_U2Si3Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.005
_cell_length_b   4.153
_cell_length_c   7.056
_cell_angle_alpha   90.002
_cell_angle_beta   90.000
_cell_angle_gamma   89.942
_symmetry_Int_Tables_number   1
_cell_volume   117.336
_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  1.000  1.000  0.992  1.0
  U  U1  1  1.000  0.500  0.509  1.0
  Si  Si2  1  0.500  0.500  0.834  1.0
  Si  Si3  1  0.500  0.500  0.164  1.0
  Si  Si4  1  0.500  1.000  0.670  1.0
  Pt  Pt5  1  0.500  1.000  0.331  1.0
[/CIF]
.