The material structure described by Sr2UO5 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(1), one O(3), one O(4), two equivalent O(2), and two equivalent O(5) atoms to form distorted SrO7 pentagonal bipyramids that share  a cornercorner with one U(1)O6 octahedra,  a cornercorner with one U(2)O6 octahedra,  an edgeedge with one U(2)O6 octahedra, edges with two equivalent U(1)O6 octahedra, and edges with two equivalent Sr(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 24-38°. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(5), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent U sites. In the first U site, U(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form UO6 octahedra that share corners with two equivalent U(2)O6 octahedra, corners with two equivalent Sr(1)O7 pentagonal bipyramids, and edges with four equivalent Sr(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 46°. In the second U site, U(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form UO6 octahedra that share corners with two equivalent U(1)O6 octahedra, corners with two equivalent Sr(1)O7 pentagonal bipyramids, and edges with two equivalent Sr(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 46°. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(2), one U(1), and one U(2) atom to form distorted OSr2U2 trigonal pyramids that share corners with three equivalent O(5)Sr3U tetrahedra, corners with two equivalent O(1)Sr2U2 trigonal pyramids, corners with three equivalent O(4)Sr3U trigonal pyramids,  an edgeedge with one O(5)Sr3U tetrahedra, and  an edgeedge with one O(4)Sr3U trigonal pyramid. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(2), two equivalent Sr(1), and one U(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Sr(2), and one U(2) atom. In the fourth O site, O(4) is bonded to one Sr(1), two equivalent Sr(2), and one U(2) atom to form distorted OSr3U trigonal pyramids that share corners with four equivalent O(5)Sr3U tetrahedra, corners with three equivalent O(1)Sr2U2 trigonal pyramids, corners with three equivalent O(4)Sr3U trigonal pyramids, and  an edgeedge with one O(1)Sr2U2 trigonal pyramid. In the fifth O site, O(5) is bonded to one Sr(2), two equivalent Sr(1), and one U(1) atom to form distorted OSr3U tetrahedra that share corners with three equivalent O(5)Sr3U tetrahedra, corners with three equivalent O(1)Sr2U2 trigonal pyramids, corners with four equivalent O(4)Sr3U trigonal pyramids, and  an edgeedge with one O(1)Sr2U2 trigonal pyramid. is represented by the CIF file [CIF]
data_Sr2UO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.688
_cell_length_b   8.090
_cell_length_c   11.926
_cell_angle_alpha   71.564
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   520.599
_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
  Sr  Sr0  1  0.932  0.157  0.681  1.0
  Sr  Sr1  1  0.432  0.843  0.819  1.0
  Sr  Sr2  1  0.068  0.843  0.319  1.0
  Sr  Sr3  1  0.568  0.157  0.181  1.0
  Sr  Sr4  1  0.500  0.339  0.862  1.0
  Sr  Sr5  1  0.000  0.661  0.638  1.0
  Sr  Sr6  1  0.500  0.661  0.138  1.0
  Sr  Sr7  1  1.000  0.339  0.362  1.0
  U  U8  1  0.000  0.000  0.000  1.0
  U  U9  1  0.500  0.000  0.500  1.0
  U  U10  1  0.000  0.500  0.000  1.0
  U  U11  1  0.500  0.500  0.500  1.0
  O  O12  1  0.652  0.251  0.502  1.0
  O  O13  1  0.152  0.749  0.998  1.0
  O  O14  1  0.348  0.749  0.498  1.0
  O  O15  1  0.848  0.251  0.002  1.0
  O  O16  1  0.759  0.019  0.379  1.0
  O  O17  1  0.259  0.981  0.121  1.0
  O  O18  1  0.241  0.981  0.621  1.0
  O  O19  1  0.741  0.019  0.879  1.0
  O  O20  1  0.799  0.605  0.426  1.0
  O  O21  1  0.299  0.395  0.074  1.0
  O  O22  1  0.201  0.395  0.574  1.0
  O  O23  1  0.701  0.605  0.926  1.0
  O  O24  1  0.670  0.446  0.664  1.0
  O  O25  1  0.170  0.554  0.836  1.0
  O  O26  1  0.330  0.554  0.336  1.0
  O  O27  1  0.830  0.446  0.164  1.0
  O  O28  1  0.709  0.892  0.641  1.0
  O  O29  1  0.209  0.108  0.859  1.0
  O  O30  1  0.291  0.108  0.359  1.0
  O  O31  1  0.791  0.892  0.141  1.0
[/CIF]
.
The material structure described by Sr2UO5 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(1), one O(3), one O(4), two equivalent O(2), and two equivalent O(5) atoms to form distorted SrO7 pentagonal bipyramids that share  a cornercorner with one U(1)O6 octahedra,  a cornercorner with one U(2)O6 octahedra,  an edgeedge with one U(2)O6 octahedra, edges with two equivalent U(1)O6 octahedra, and edges with two equivalent Sr(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles range from 24-38°. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(5), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent U sites. In the first U site, U(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(5) atoms to form UO6 octahedra that share corners with two equivalent U(2)O6 octahedra, corners with two equivalent Sr(1)O7 pentagonal bipyramids, and edges with four equivalent Sr(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 46°. In the second U site, U(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form UO6 octahedra that share corners with two equivalent U(1)O6 octahedra, corners with two equivalent Sr(1)O7 pentagonal bipyramids, and edges with two equivalent Sr(1)O7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 46°. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Sr(2), one U(1), and one U(2) atom to form distorted OSr2U2 trigonal pyramids that share corners with three equivalent O(5)Sr3U tetrahedra, corners with two equivalent O(1)Sr2U2 trigonal pyramids, corners with three equivalent O(4)Sr3U trigonal pyramids,  an edgeedge with one O(5)Sr3U tetrahedra, and  an edgeedge with one O(4)Sr3U trigonal pyramid. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(2), two equivalent Sr(1), and one U(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Sr(2), and one U(2) atom. In the fourth O site, O(4) is bonded to one Sr(1), two equivalent Sr(2), and one U(2) atom to form distorted OSr3U trigonal pyramids that share corners with four equivalent O(5)Sr3U tetrahedra, corners with three equivalent O(1)Sr2U2 trigonal pyramids, corners with three equivalent O(4)Sr3U trigonal pyramids, and  an edgeedge with one O(1)Sr2U2 trigonal pyramid. In the fifth O site, O(5) is bonded to one Sr(2), two equivalent Sr(1), and one U(1) atom to form distorted OSr3U tetrahedra that share corners with three equivalent O(5)Sr3U tetrahedra, corners with three equivalent O(1)Sr2U2 trigonal pyramids, corners with four equivalent O(4)Sr3U trigonal pyramids, and  an edgeedge with one O(1)Sr2U2 trigonal pyramid. is represented by the CIF file [CIF]
data_Sr2UO5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.688
_cell_length_b   8.090
_cell_length_c   11.926
_cell_angle_alpha   71.564
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   520.599
_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
  Sr  Sr0  1  0.932  0.157  0.681  1.0
  Sr  Sr1  1  0.432  0.843  0.819  1.0
  Sr  Sr2  1  0.068  0.843  0.319  1.0
  Sr  Sr3  1  0.568  0.157  0.181  1.0
  Sr  Sr4  1  0.500  0.339  0.862  1.0
  Sr  Sr5  1  0.000  0.661  0.638  1.0
  Sr  Sr6  1  0.500  0.661  0.138  1.0
  Sr  Sr7  1  1.000  0.339  0.362  1.0
  U  U8  1  0.000  0.000  0.000  1.0
  U  U9  1  0.500  0.000  0.500  1.0
  U  U10  1  0.000  0.500  0.000  1.0
  U  U11  1  0.500  0.500  0.500  1.0
  O  O12  1  0.652  0.251  0.502  1.0
  O  O13  1  0.152  0.749  0.998  1.0
  O  O14  1  0.348  0.749  0.498  1.0
  O  O15  1  0.848  0.251  0.002  1.0
  O  O16  1  0.759  0.019  0.379  1.0
  O  O17  1  0.259  0.981  0.121  1.0
  O  O18  1  0.241  0.981  0.621  1.0
  O  O19  1  0.741  0.019  0.879  1.0
  O  O20  1  0.799  0.605  0.426  1.0
  O  O21  1  0.299  0.395  0.074  1.0
  O  O22  1  0.201  0.395  0.574  1.0
  O  O23  1  0.701  0.605  0.926  1.0
  O  O24  1  0.670  0.446  0.664  1.0
  O  O25  1  0.170  0.554  0.836  1.0
  O  O26  1  0.330  0.554  0.336  1.0
  O  O27  1  0.830  0.446  0.164  1.0
  O  O28  1  0.709  0.892  0.641  1.0
  O  O29  1  0.209  0.108  0.859  1.0
  O  O30  1  0.291  0.108  0.359  1.0
  O  O31  1  0.791  0.892  0.141  1.0
[/CIF]
.