The structure described by UPt crystallizes in the monoclinic P2_1 space group. There are four inequivalent U sites. In the first U site, U(1) is bonded in a 7-coordinate geometry to one Pt(2), two equivalent Pt(1), two equivalent Pt(3), and two equivalent Pt(4) atoms. In the second U site, U(2) is bonded in a 7-coordinate geometry to one Pt(1), two equivalent Pt(2), two equivalent Pt(3), and two equivalent Pt(4) atoms. In the third U site, U(3) is bonded in a 7-coordinate geometry to one Pt(4), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Pt(3) atoms. In the fourth U site, U(4) is bonded in a 7-coordinate geometry to one Pt(3), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Pt(4) atoms. There are four inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 7-coordinate geometry to one U(2), two equivalent U(1), two equivalent U(3), two equivalent U(4), and one Pt(2) atom. In the second Pt site, Pt(2) is bonded in a 10-coordinate geometry to one U(1), two equivalent U(2), two equivalent U(3), two equivalent U(4), one Pt(1), one Pt(3), and one Pt(4) atom. In the third Pt site, Pt(3) is bonded in a 7-coordinate geometry to one U(4), two equivalent U(1), two equivalent U(2), two equivalent U(3), and one Pt(2) atom. In the fourth Pt site, Pt(4) is bonded in a 7-coordinate geometry to one U(3), two equivalent U(1), two equivalent U(2), two equivalent U(4), and one Pt(2) atom. is represented by the CIF file [CIF]
data_UPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.669
_cell_length_b   5.773
_cell_length_c   5.816
_cell_angle_alpha   78.415
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   350.956
_cell_formula_units_Z   8
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  0.003  0.139  0.909  1.0
  U  U1  1  0.503  0.861  0.091  1.0
  U  U2  1  0.016  0.611  0.347  1.0
  U  U3  1  0.516  0.389  0.653  1.0
  U  U4  1  0.289  0.861  0.598  1.0
  U  U5  1  0.789  0.139  0.402  1.0
  U  U6  1  0.280  0.399  0.158  1.0
  U  U7  1  0.780  0.601  0.842  1.0
  Pt  Pt8  1  0.740  0.086  0.911  1.0
  Pt  Pt9  1  0.240  0.914  0.089  1.0
  Pt  Pt10  1  0.747  0.648  0.336  1.0
  Pt  Pt11  1  0.247  0.352  0.664  1.0
  Pt  Pt12  1  0.554  0.902  0.581  1.0
  Pt  Pt13  1  0.054  0.098  0.419  1.0
  Pt  Pt14  1  0.548  0.352  0.156  1.0
  Pt  Pt15  1  0.048  0.648  0.844  1.0
[/CIF]
.
The structure described by UPt crystallizes in the monoclinic P2_1 space group. There are four inequivalent U sites. In the first U site, U(1) is bonded in a 7-coordinate geometry to one Pt(2), two equivalent Pt(1), two equivalent Pt(3), and two equivalent Pt(4) atoms. In the second U site, U(2) is bonded in a 7-coordinate geometry to one Pt(1), two equivalent Pt(2), two equivalent Pt(3), and two equivalent Pt(4) atoms. In the third U site, U(3) is bonded in a 7-coordinate geometry to one Pt(4), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Pt(3) atoms. In the fourth U site, U(4) is bonded in a 7-coordinate geometry to one Pt(3), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Pt(4) atoms. There are four inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 7-coordinate geometry to one U(2), two equivalent U(1), two equivalent U(3), two equivalent U(4), and one Pt(2) atom. In the second Pt site, Pt(2) is bonded in a 10-coordinate geometry to one U(1), two equivalent U(2), two equivalent U(3), two equivalent U(4), one Pt(1), one Pt(3), and one Pt(4) atom. In the third Pt site, Pt(3) is bonded in a 7-coordinate geometry to one U(4), two equivalent U(1), two equivalent U(2), two equivalent U(3), and one Pt(2) atom. In the fourth Pt site, Pt(4) is bonded in a 7-coordinate geometry to one U(3), two equivalent U(1), two equivalent U(2), two equivalent U(4), and one Pt(2) atom. is represented by the CIF file [CIF]
data_UPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.669
_cell_length_b   5.773
_cell_length_c   5.816
_cell_angle_alpha   78.415
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   350.956
_cell_formula_units_Z   8
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  0.003  0.139  0.909  1.0
  U  U1  1  0.503  0.861  0.091  1.0
  U  U2  1  0.016  0.611  0.347  1.0
  U  U3  1  0.516  0.389  0.653  1.0
  U  U4  1  0.289  0.861  0.598  1.0
  U  U5  1  0.789  0.139  0.402  1.0
  U  U6  1  0.280  0.399  0.158  1.0
  U  U7  1  0.780  0.601  0.842  1.0
  Pt  Pt8  1  0.740  0.086  0.911  1.0
  Pt  Pt9  1  0.240  0.914  0.089  1.0
  Pt  Pt10  1  0.747  0.648  0.336  1.0
  Pt  Pt11  1  0.247  0.352  0.664  1.0
  Pt  Pt12  1  0.554  0.902  0.581  1.0
  Pt  Pt13  1  0.054  0.098  0.419  1.0
  Pt  Pt14  1  0.548  0.352  0.156  1.0
  Pt  Pt15  1  0.048  0.648  0.844  1.0
[/CIF]
.