The material structure described by U2Cu(GeO7)2(O2)2 crystallizes in the monoclinic C2/m space group. The structure consists of two tetraoxetane molecules inside a U2Cu(GeO7)2 framework. In the U2Cu(GeO7)2 framework, U(1) is bonded to one O(5), one O(6), one O(7), and four equivalent O(3) atoms to form distorted UO7 pentagonal bipyramids that share corners with three equivalent Ge(1)O4 tetrahedra, edges with two equivalent U(1)O7 pentagonal bipyramids, and  an edgeedge with one Ge(1)O4 tetrahedra. Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(7) atoms. Ge(1) is bonded to one O(4), one O(5), and two equivalent O(3) atoms to form GeO4 tetrahedra that share corners with three equivalent U(1)O7 pentagonal bipyramids and  an edgeedge with one U(1)O7 pentagonal bipyramid. There are six inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Cu(1) atom. In the second O site, O(3) is bonded in a 3-coordinate geometry to two equivalent U(1) and one Ge(1) atom. In the third O site, O(4) is bonded in a single-bond geometry to one Ge(1) atom. In the fourth O site, O(5) is bonded in a bent 150 degrees geometry to one U(1) and one Ge(1) atom. In the fifth O site, O(6) is bonded in a single-bond geometry to one U(1) atom. In the sixth O site, O(7) is bonded in a bent 150 degrees geometry to one U(1) and one Cu(1) atom. is represented by the CIF file [CIF]
data_U2Cu(GeO9)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.792
_cell_length_b   8.792
_cell_length_c   6.951
_cell_angle_alpha   67.264
_cell_angle_beta   112.736
_cell_angle_gamma   133.414
_symmetry_Int_Tables_number   1
_cell_volume   354.102
_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  0.755  0.245  0.866  1.0
  U  U1  1  0.245  0.755  0.134  1.0
  Cu  Cu2  1  0.000  0.000  0.000  1.0
  Ge  Ge3  1  0.701  0.299  0.284  1.0
  Ge  Ge4  1  0.299  0.701  0.716  1.0
  O  O5  1  0.268  0.268  0.000  1.0
  O  O6  1  0.732  0.732  0.000  1.0
  O  O7  1  0.954  0.046  0.567  1.0
  O  O8  1  0.046  0.954  0.433  1.0
  O  O9  1  0.922  0.443  0.162  1.0
  O  O10  1  0.557  0.078  0.162  1.0
  O  O11  1  0.078  0.557  0.838  1.0
  O  O12  1  0.443  0.922  0.838  1.0
  O  O13  1  0.580  0.420  0.220  1.0
  O  O14  1  0.420  0.580  0.780  1.0
  O  O15  1  0.762  0.238  0.561  1.0
  O  O16  1  0.238  0.762  0.439  1.0
  O  O17  1  0.631  0.369  0.742  1.0
  O  O18  1  0.369  0.631  0.258  1.0
  O  O19  1  0.887  0.113  0.006  1.0
  O  O20  1  0.113  0.887  0.994  1.0
  O  O21  1  0.150  0.150  0.500  1.0
  O  O22  1  0.850  0.850  0.500  1.0
[/CIF]
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The material structure described by U2Cu(GeO7)2(O2)2 crystallizes in the monoclinic C2/m space group. The structure consists of two tetraoxetane molecules inside a U2Cu(GeO7)2 framework. In the U2Cu(GeO7)2 framework, U(1) is bonded to one O(5), one O(6), one O(7), and four equivalent O(3) atoms to form distorted UO7 pentagonal bipyramids that share corners with three equivalent Ge(1)O4 tetrahedra, edges with two equivalent U(1)O7 pentagonal bipyramids, and  an edgeedge with one Ge(1)O4 tetrahedra. Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(7) atoms. Ge(1) is bonded to one O(4), one O(5), and two equivalent O(3) atoms to form GeO4 tetrahedra that share corners with three equivalent U(1)O7 pentagonal bipyramids and  an edgeedge with one U(1)O7 pentagonal bipyramid. There are six inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Cu(1) atom. In the second O site, O(3) is bonded in a 3-coordinate geometry to two equivalent U(1) and one Ge(1) atom. In the third O site, O(4) is bonded in a single-bond geometry to one Ge(1) atom. In the fourth O site, O(5) is bonded in a bent 150 degrees geometry to one U(1) and one Ge(1) atom. In the fifth O site, O(6) is bonded in a single-bond geometry to one U(1) atom. In the sixth O site, O(7) is bonded in a bent 150 degrees geometry to one U(1) and one Cu(1) atom. is represented by the CIF file [CIF]
data_U2Cu(GeO9)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.792
_cell_length_b   8.792
_cell_length_c   6.951
_cell_angle_alpha   67.264
_cell_angle_beta   112.736
_cell_angle_gamma   133.414
_symmetry_Int_Tables_number   1
_cell_volume   354.102
_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  0.755  0.245  0.866  1.0
  U  U1  1  0.245  0.755  0.134  1.0
  Cu  Cu2  1  0.000  0.000  0.000  1.0
  Ge  Ge3  1  0.701  0.299  0.284  1.0
  Ge  Ge4  1  0.299  0.701  0.716  1.0
  O  O5  1  0.268  0.268  0.000  1.0
  O  O6  1  0.732  0.732  0.000  1.0
  O  O7  1  0.954  0.046  0.567  1.0
  O  O8  1  0.046  0.954  0.433  1.0
  O  O9  1  0.922  0.443  0.162  1.0
  O  O10  1  0.557  0.078  0.162  1.0
  O  O11  1  0.078  0.557  0.838  1.0
  O  O12  1  0.443  0.922  0.838  1.0
  O  O13  1  0.580  0.420  0.220  1.0
  O  O14  1  0.420  0.580  0.780  1.0
  O  O15  1  0.762  0.238  0.561  1.0
  O  O16  1  0.238  0.762  0.439  1.0
  O  O17  1  0.631  0.369  0.742  1.0
  O  O18  1  0.369  0.631  0.258  1.0
  O  O19  1  0.887  0.113  0.006  1.0
  O  O20  1  0.113  0.887  0.994  1.0
  O  O21  1  0.150  0.150  0.500  1.0
  O  O22  1  0.850  0.850  0.500  1.0
[/CIF]
.