The material described by UH3 crystallizes in the cubic Pm-3n space group. There are two inequivalent U sites. In the first U site, U(1) is bonded to twelve equivalent H(1) atoms to form face-sharing UH12 cuboctahedra. In the second U site, U(2) is bonded to twelve equivalent H(1) atoms to form a mixture of edge and face-sharing UH12 cuboctahedra. H(1) is bonded to one U(1) and three equivalent U(2) atoms to form a mixture of edge, face, and corner-sharing HU4 tetrahedra. is represented by the CIF file [CIF]
data_UH3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.668
_cell_length_b   6.668
_cell_length_c   6.668
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   296.420
_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  0.000  0.000  0.000  1.0
  U  U1  1  0.500  0.500  0.500  1.0
  U  U2  1  0.250  0.000  0.500  1.0
  U  U3  1  0.750  0.000  0.500  1.0
  U  U4  1  0.000  0.500  0.250  1.0
  U  U5  1  0.000  0.500  0.750  1.0
  U  U6  1  0.500  0.750  0.000  1.0
  U  U7  1  0.500  0.250  0.000  1.0
  H  H8  1  0.000  0.155  0.304  1.0
  H  H9  1  0.500  0.196  0.655  1.0
  H  H10  1  0.500  0.804  0.345  1.0
  H  H11  1  0.804  0.655  0.500  1.0
  H  H12  1  0.196  0.655  0.500  1.0
  H  H13  1  0.345  0.500  0.804  1.0
  H  H14  1  0.655  0.500  0.804  1.0
  H  H15  1  0.304  0.000  0.155  1.0
  H  H16  1  0.155  0.304  0.000  1.0
  H  H17  1  0.845  0.696  0.000  1.0
  H  H18  1  0.304  0.000  0.845  1.0
  H  H19  1  0.845  0.304  0.000  1.0
  H  H20  1  0.696  0.000  0.155  1.0
  H  H21  1  0.696  0.000  0.845  1.0
  H  H22  1  0.155  0.696  0.000  1.0
  H  H23  1  0.000  0.845  0.696  1.0
  H  H24  1  0.000  0.155  0.696  1.0
  H  H25  1  0.000  0.845  0.304  1.0
  H  H26  1  0.655  0.500  0.196  1.0
  H  H27  1  0.345  0.500  0.196  1.0
  H  H28  1  0.804  0.345  0.500  1.0
  H  H29  1  0.196  0.345  0.500  1.0
  H  H30  1  0.500  0.804  0.655  1.0
  H  H31  1  0.500  0.196  0.345  1.0
[/CIF]
.
The material described by UH3 crystallizes in the cubic Pm-3n space group. There are two inequivalent U sites. In the first U site, U(1) is bonded to twelve equivalent H(1) atoms to form face-sharing UH12 cuboctahedra. In the second U site, U(2) is bonded to twelve equivalent H(1) atoms to form a mixture of edge and face-sharing UH12 cuboctahedra. H(1) is bonded to one U(1) and three equivalent U(2) atoms to form a mixture of edge, face, and corner-sharing HU4 tetrahedra. is represented by the CIF file [CIF]
data_UH3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.668
_cell_length_b   6.668
_cell_length_c   6.668
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   296.420
_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  0.000  0.000  0.000  1.0
  U  U1  1  0.500  0.500  0.500  1.0
  U  U2  1  0.250  0.000  0.500  1.0
  U  U3  1  0.750  0.000  0.500  1.0
  U  U4  1  0.000  0.500  0.250  1.0
  U  U5  1  0.000  0.500  0.750  1.0
  U  U6  1  0.500  0.750  0.000  1.0
  U  U7  1  0.500  0.250  0.000  1.0
  H  H8  1  0.000  0.155  0.304  1.0
  H  H9  1  0.500  0.196  0.655  1.0
  H  H10  1  0.500  0.804  0.345  1.0
  H  H11  1  0.804  0.655  0.500  1.0
  H  H12  1  0.196  0.655  0.500  1.0
  H  H13  1  0.345  0.500  0.804  1.0
  H  H14  1  0.655  0.500  0.804  1.0
  H  H15  1  0.304  0.000  0.155  1.0
  H  H16  1  0.155  0.304  0.000  1.0
  H  H17  1  0.845  0.696  0.000  1.0
  H  H18  1  0.304  0.000  0.845  1.0
  H  H19  1  0.845  0.304  0.000  1.0
  H  H20  1  0.696  0.000  0.155  1.0
  H  H21  1  0.696  0.000  0.845  1.0
  H  H22  1  0.155  0.696  0.000  1.0
  H  H23  1  0.000  0.845  0.696  1.0
  H  H24  1  0.000  0.155  0.696  1.0
  H  H25  1  0.000  0.845  0.304  1.0
  H  H26  1  0.655  0.500  0.196  1.0
  H  H27  1  0.345  0.500  0.196  1.0
  H  H28  1  0.804  0.345  0.500  1.0
  H  H29  1  0.196  0.345  0.500  1.0
  H  H30  1  0.500  0.804  0.655  1.0
  H  H31  1  0.500  0.196  0.345  1.0
[/CIF]
.