The compound described by In2Ge2O7 crystallizes in the cubic Fd-3m space group. In(1) is bonded to two equivalent O(1) and six equivalent O(2) atoms to form distorted InO8 hexagonal bipyramids that share edges with six equivalent In(1)O8 hexagonal bipyramids and edges with six equivalent Ge(1)O6 octahedra. Ge(1) is bonded to six equivalent O(2) atoms to form GeO6 octahedra that share corners with six equivalent Ge(1)O6 octahedra and edges with six equivalent In(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 48°. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent In(1) atoms to form OIn4 tetrahedra that share corners with four equivalent O(1)In4 tetrahedra, corners with twelve equivalent O(2)In2Ge2 tetrahedra, and edges with six equivalent O(2)In2Ge2 tetrahedra. In the second O site, O(2) is bonded to two equivalent In(1) and two equivalent Ge(1) atoms to form distorted OIn2Ge2 tetrahedra that share corners with two equivalent O(1)In4 tetrahedra, corners with twelve equivalent O(2)In2Ge2 tetrahedra,  an edgeedge with one O(1)In4 tetrahedra, and edges with four equivalent O(2)In2Ge2 tetrahedra. is represented by the CIF file [CIF]
data_In2Ge2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.888
_cell_length_b   6.888
_cell_length_c   6.888
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   231.038
_cell_formula_units_Z   2
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
  In  In0  1  0.500  0.500  0.000  1.0
  In  In1  1  0.500  0.000  0.500  1.0
  In  In2  1  0.000  0.500  0.500  1.0
  In  In3  1  0.500  0.500  0.500  1.0
  Ge  Ge4  1  0.000  0.000  0.500  1.0
  Ge  Ge5  1  0.000  0.500  0.000  1.0
  Ge  Ge6  1  0.500  0.000  0.000  1.0
  Ge  Ge7  1  0.000  0.000  0.000  1.0
  O  O8  1  0.375  0.375  0.375  1.0
  O  O9  1  0.625  0.625  0.625  1.0
  O  O10  1  0.329  0.921  0.921  1.0
  O  O11  1  0.921  0.329  0.329  1.0
  O  O12  1  0.921  0.329  0.921  1.0
  O  O13  1  0.329  0.921  0.329  1.0
  O  O14  1  0.921  0.921  0.329  1.0
  O  O15  1  0.329  0.329  0.921  1.0
  O  O16  1  0.671  0.079  0.079  1.0
  O  O17  1  0.079  0.671  0.671  1.0
  O  O18  1  0.079  0.671  0.079  1.0
  O  O19  1  0.671  0.079  0.671  1.0
  O  O20  1  0.079  0.079  0.671  1.0
  O  O21  1  0.671  0.671  0.079  1.0
[/CIF]
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The compound described by In2Ge2O7 crystallizes in the cubic Fd-3m space group. In(1) is bonded to two equivalent O(1) and six equivalent O(2) atoms to form distorted InO8 hexagonal bipyramids that share edges with six equivalent In(1)O8 hexagonal bipyramids and edges with six equivalent Ge(1)O6 octahedra. Ge(1) is bonded to six equivalent O(2) atoms to form GeO6 octahedra that share corners with six equivalent Ge(1)O6 octahedra and edges with six equivalent In(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 48°. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent In(1) atoms to form OIn4 tetrahedra that share corners with four equivalent O(1)In4 tetrahedra, corners with twelve equivalent O(2)In2Ge2 tetrahedra, and edges with six equivalent O(2)In2Ge2 tetrahedra. In the second O site, O(2) is bonded to two equivalent In(1) and two equivalent Ge(1) atoms to form distorted OIn2Ge2 tetrahedra that share corners with two equivalent O(1)In4 tetrahedra, corners with twelve equivalent O(2)In2Ge2 tetrahedra,  an edgeedge with one O(1)In4 tetrahedra, and edges with four equivalent O(2)In2Ge2 tetrahedra. is represented by the CIF file [CIF]
data_In2Ge2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.888
_cell_length_b   6.888
_cell_length_c   6.888
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   231.038
_cell_formula_units_Z   2
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
  In  In0  1  0.500  0.500  0.000  1.0
  In  In1  1  0.500  0.000  0.500  1.0
  In  In2  1  0.000  0.500  0.500  1.0
  In  In3  1  0.500  0.500  0.500  1.0
  Ge  Ge4  1  0.000  0.000  0.500  1.0
  Ge  Ge5  1  0.000  0.500  0.000  1.0
  Ge  Ge6  1  0.500  0.000  0.000  1.0
  Ge  Ge7  1  0.000  0.000  0.000  1.0
  O  O8  1  0.375  0.375  0.375  1.0
  O  O9  1  0.625  0.625  0.625  1.0
  O  O10  1  0.329  0.921  0.921  1.0
  O  O11  1  0.921  0.329  0.329  1.0
  O  O12  1  0.921  0.329  0.921  1.0
  O  O13  1  0.329  0.921  0.329  1.0
  O  O14  1  0.921  0.921  0.329  1.0
  O  O15  1  0.329  0.329  0.921  1.0
  O  O16  1  0.671  0.079  0.079  1.0
  O  O17  1  0.079  0.671  0.671  1.0
  O  O18  1  0.079  0.671  0.079  1.0
  O  O19  1  0.671  0.079  0.671  1.0
  O  O20  1  0.079  0.079  0.671  1.0
  O  O21  1  0.671  0.671  0.079  1.0
[/CIF]
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