The structure described by U3O10 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent U sites. In the first U site, U(1) is bonded to one O(1), one O(3), one O(4), one O(5), one O(6), and one O(7) atom to form distorted UO6 octahedra that share corners with four equivalent U(2)O6 octahedra, corners with two equivalent U(3)O7 pentagonal bipyramids, and  an edgeedge with one U(3)O7 pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 55-66°. In the second U site, U(2) is bonded to one O(2), one O(8), two equivalent O(3), and two equivalent O(6) atoms to form distorted UO6 octahedra that share corners with four equivalent U(1)O6 octahedra,  a cornercorner with one U(3)O7 pentagonal bipyramid, and edges with two equivalent U(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-66°. In the third U site, U(3) is bonded to one O(10), one O(8), one O(9), two equivalent O(1), and two equivalent O(5) atoms to form distorted UO7 pentagonal bipyramids that share  a cornercorner with one U(2)O6 octahedra, corners with two equivalent U(1)O6 octahedra,  an edgeedge with one U(1)O6 octahedra, and edges with two equivalent U(3)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 11-45°. There are ten inequivalent O sites. In the first O site, O(6) is bonded in a trigonal non-coplanar geometry to one U(1) and two equivalent U(2) atoms. In the second O site, O(7) is bonded in a single-bond geometry to one U(1) atom. In the third O site, O(8) is bonded in a distorted linear geometry to one U(2) and one U(3) atom. In the fourth O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one U(1) and two equivalent U(3) atoms. In the fifth O site, O(9) is bonded in a single-bond geometry to one U(3) atom. In the sixth O site, O(2) is bonded in a single-bond geometry to one U(2) atom. In the seventh O site, O(10) is bonded in a single-bond geometry to one U(3) atom. In the eighth O site, O(3) is bonded in a trigonal planar geometry to one U(1) and two equivalent U(2) atoms. In the ninth O site, O(4) is bonded in a single-bond geometry to one U(1) atom. In the tenth O site, O(5) is bonded in a distorted trigonal planar geometry to one U(1) and two equivalent U(3) atoms. is represented by the CIF file [CIF]
data_U3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   19.104
_cell_length_b   6.980
_cell_length_c   7.356
_cell_angle_alpha   59.661
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   846.458
_cell_formula_units_Z   4
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  0.343  0.719  0.239  1.0
  U  U1  1  0.843  0.281  0.261  1.0
  U  U2  1  0.657  0.281  0.761  1.0
  U  U3  1  0.157  0.719  0.739  1.0
  U  U4  1  0.256  0.225  0.236  1.0
  U  U5  1  0.756  0.775  0.264  1.0
  U  U6  1  0.744  0.775  0.764  1.0
  U  U7  1  0.244  0.225  0.736  1.0
  U  U8  1  0.033  0.245  0.248  1.0
  U  U9  1  0.533  0.755  0.252  1.0
  U  U10  1  0.967  0.755  0.752  1.0
  U  U11  1  0.467  0.245  0.748  1.0
  O  O12  1  0.439  0.536  0.401  1.0
  O  O13  1  0.939  0.464  0.099  1.0
  O  O14  1  0.561  0.464  0.599  1.0
  O  O15  1  0.061  0.536  0.901  1.0
  O  O16  1  0.351  0.222  0.263  1.0
  O  O17  1  0.851  0.778  0.237  1.0
  O  O18  1  0.649  0.778  0.737  1.0
  O  O19  1  0.149  0.222  0.763  1.0
  O  O20  1  0.267  0.011  0.091  1.0
  O  O21  1  0.767  0.989  0.409  1.0
  O  O22  1  0.733  0.989  0.909  1.0
  O  O23  1  0.233  0.011  0.591  1.0
  O  O24  1  0.167  0.694  0.505  1.0
  O  O25  1  0.667  0.306  0.995  1.0
  O  O26  1  0.833  0.306  0.495  1.0
  O  O27  1  0.333  0.694  0.005  1.0
  O  O28  1  0.434  0.932  0.077  1.0
  O  O29  1  0.934  0.068  0.423  1.0
  O  O30  1  0.566  0.068  0.923  1.0
  O  O31  1  0.066  0.932  0.577  1.0
  O  O32  1  0.258  0.442  0.381  1.0
  O  O33  1  0.758  0.558  0.119  1.0
  O  O34  1  0.742  0.558  0.619  1.0
  O  O35  1  0.242  0.442  0.881  1.0
  O  O36  1  0.334  0.745  0.473  1.0
  O  O37  1  0.834  0.255  0.027  1.0
  O  O38  1  0.666  0.255  0.527  1.0
  O  O39  1  0.166  0.745  0.973  1.0
  O  O40  1  0.158  0.226  0.219  1.0
  O  O41  1  0.658  0.774  0.281  1.0
  O  O42  1  0.842  0.774  0.781  1.0
  O  O43  1  0.342  0.226  0.719  1.0
  O  O44  1  0.028  0.062  0.142  1.0
  O  O45  1  0.528  0.938  0.358  1.0
  O  O46  1  0.972  0.938  0.858  1.0
  O  O47  1  0.472  0.062  0.642  1.0
  O  O48  1  0.053  0.423  0.353  1.0
  O  O49  1  0.553  0.577  0.147  1.0
  O  O50  1  0.947  0.577  0.647  1.0
  O  O51  1  0.447  0.423  0.853  1.0
[/CIF]
.
The structure described by U3O10 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent U sites. In the first U site, U(1) is bonded to one O(1), one O(3), one O(4), one O(5), one O(6), and one O(7) atom to form distorted UO6 octahedra that share corners with four equivalent U(2)O6 octahedra, corners with two equivalent U(3)O7 pentagonal bipyramids, and  an edgeedge with one U(3)O7 pentagonal bipyramid. The corner-sharing octahedral tilt angles range from 55-66°. In the second U site, U(2) is bonded to one O(2), one O(8), two equivalent O(3), and two equivalent O(6) atoms to form distorted UO6 octahedra that share corners with four equivalent U(1)O6 octahedra,  a cornercorner with one U(3)O7 pentagonal bipyramid, and edges with two equivalent U(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-66°. In the third U site, U(3) is bonded to one O(10), one O(8), one O(9), two equivalent O(1), and two equivalent O(5) atoms to form distorted UO7 pentagonal bipyramids that share  a cornercorner with one U(2)O6 octahedra, corners with two equivalent U(1)O6 octahedra,  an edgeedge with one U(1)O6 octahedra, and edges with two equivalent U(3)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 11-45°. There are ten inequivalent O sites. In the first O site, O(6) is bonded in a trigonal non-coplanar geometry to one U(1) and two equivalent U(2) atoms. In the second O site, O(7) is bonded in a single-bond geometry to one U(1) atom. In the third O site, O(8) is bonded in a distorted linear geometry to one U(2) and one U(3) atom. In the fourth O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one U(1) and two equivalent U(3) atoms. In the fifth O site, O(9) is bonded in a single-bond geometry to one U(3) atom. In the sixth O site, O(2) is bonded in a single-bond geometry to one U(2) atom. In the seventh O site, O(10) is bonded in a single-bond geometry to one U(3) atom. In the eighth O site, O(3) is bonded in a trigonal planar geometry to one U(1) and two equivalent U(2) atoms. In the ninth O site, O(4) is bonded in a single-bond geometry to one U(1) atom. In the tenth O site, O(5) is bonded in a distorted trigonal planar geometry to one U(1) and two equivalent U(3) atoms. is represented by the CIF file [CIF]
data_U3O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   19.104
_cell_length_b   6.980
_cell_length_c   7.356
_cell_angle_alpha   59.661
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   846.458
_cell_formula_units_Z   4
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  0.343  0.719  0.239  1.0
  U  U1  1  0.843  0.281  0.261  1.0
  U  U2  1  0.657  0.281  0.761  1.0
  U  U3  1  0.157  0.719  0.739  1.0
  U  U4  1  0.256  0.225  0.236  1.0
  U  U5  1  0.756  0.775  0.264  1.0
  U  U6  1  0.744  0.775  0.764  1.0
  U  U7  1  0.244  0.225  0.736  1.0
  U  U8  1  0.033  0.245  0.248  1.0
  U  U9  1  0.533  0.755  0.252  1.0
  U  U10  1  0.967  0.755  0.752  1.0
  U  U11  1  0.467  0.245  0.748  1.0
  O  O12  1  0.439  0.536  0.401  1.0
  O  O13  1  0.939  0.464  0.099  1.0
  O  O14  1  0.561  0.464  0.599  1.0
  O  O15  1  0.061  0.536  0.901  1.0
  O  O16  1  0.351  0.222  0.263  1.0
  O  O17  1  0.851  0.778  0.237  1.0
  O  O18  1  0.649  0.778  0.737  1.0
  O  O19  1  0.149  0.222  0.763  1.0
  O  O20  1  0.267  0.011  0.091  1.0
  O  O21  1  0.767  0.989  0.409  1.0
  O  O22  1  0.733  0.989  0.909  1.0
  O  O23  1  0.233  0.011  0.591  1.0
  O  O24  1  0.167  0.694  0.505  1.0
  O  O25  1  0.667  0.306  0.995  1.0
  O  O26  1  0.833  0.306  0.495  1.0
  O  O27  1  0.333  0.694  0.005  1.0
  O  O28  1  0.434  0.932  0.077  1.0
  O  O29  1  0.934  0.068  0.423  1.0
  O  O30  1  0.566  0.068  0.923  1.0
  O  O31  1  0.066  0.932  0.577  1.0
  O  O32  1  0.258  0.442  0.381  1.0
  O  O33  1  0.758  0.558  0.119  1.0
  O  O34  1  0.742  0.558  0.619  1.0
  O  O35  1  0.242  0.442  0.881  1.0
  O  O36  1  0.334  0.745  0.473  1.0
  O  O37  1  0.834  0.255  0.027  1.0
  O  O38  1  0.666  0.255  0.527  1.0
  O  O39  1  0.166  0.745  0.973  1.0
  O  O40  1  0.158  0.226  0.219  1.0
  O  O41  1  0.658  0.774  0.281  1.0
  O  O42  1  0.842  0.774  0.781  1.0
  O  O43  1  0.342  0.226  0.719  1.0
  O  O44  1  0.028  0.062  0.142  1.0
  O  O45  1  0.528  0.938  0.358  1.0
  O  O46  1  0.972  0.938  0.858  1.0
  O  O47  1  0.472  0.062  0.642  1.0
  O  O48  1  0.053  0.423  0.353  1.0
  O  O49  1  0.553  0.577  0.147  1.0
  O  O50  1  0.947  0.577  0.647  1.0
  O  O51  1  0.447  0.423  0.853  1.0
[/CIF]
.