The material described by Ho2Ge2O7 crystallizes in the cubic Fd-3m space group. Ho(1) is bonded to two equivalent O(1) and six equivalent O(2) atoms to form distorted HoO8 hexagonal bipyramids that share edges with six equivalent Ho(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 Ho(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 47°. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Ho(1) atoms to form OHo4 tetrahedra that share corners with four equivalent O(1)Ho4 tetrahedra, corners with twelve equivalent O(2)Ho2Ge2 tetrahedra, and edges with six equivalent O(2)Ho2Ge2 tetrahedra. In the second O site, O(2) is bonded to two equivalent Ho(1) and two equivalent Ge(1) atoms to form distorted OHo2Ge2 tetrahedra that share corners with two equivalent O(1)Ho4 tetrahedra, corners with twelve equivalent O(2)Ho2Ge2 tetrahedra,  an edgeedge with one O(1)Ho4 tetrahedra, and edges with four equivalent O(2)Ho2Ge2 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ho2Ge2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.991
_cell_length_b   6.991
_cell_length_c   6.991
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   241.558
_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
  Ho  Ho0  1  0.125  0.625  0.625  1.0
  Ho  Ho1  1  0.625  0.625  0.625  1.0
  Ho  Ho2  1  0.625  0.125  0.625  1.0
  Ho  Ho3  1  0.625  0.625  0.125  1.0
  Ge  Ge4  1  0.125  0.625  0.125  1.0
  Ge  Ge5  1  0.125  0.125  0.625  1.0
  Ge  Ge6  1  0.625  0.125  0.125  1.0
  Ge  Ge7  1  0.125  0.125  0.125  1.0
  O  O8  1  0.750  0.750  0.750  1.0
  O  O9  1  0.202  0.798  0.798  1.0
  O  O10  1  0.202  0.798  0.202  1.0
  O  O11  1  0.798  0.798  0.202  1.0
  O  O12  1  0.798  0.202  0.798  1.0
  O  O13  1  0.202  0.202  0.798  1.0
  O  O14  1  0.452  0.048  0.048  1.0
  O  O15  1  0.798  0.202  0.202  1.0
  O  O16  1  0.048  0.048  0.452  1.0
  O  O17  1  0.452  0.048  0.452  1.0
  O  O18  1  0.048  0.452  0.048  1.0
  O  O19  1  0.452  0.452  0.048  1.0
  O  O20  1  0.048  0.452  0.452  1.0
  O  O21  1  0.500  0.500  0.500  1.0
[/CIF]
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The material described by Ho2Ge2O7 crystallizes in the cubic Fd-3m space group. Ho(1) is bonded to two equivalent O(1) and six equivalent O(2) atoms to form distorted HoO8 hexagonal bipyramids that share edges with six equivalent Ho(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 Ho(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 47°. There are two inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Ho(1) atoms to form OHo4 tetrahedra that share corners with four equivalent O(1)Ho4 tetrahedra, corners with twelve equivalent O(2)Ho2Ge2 tetrahedra, and edges with six equivalent O(2)Ho2Ge2 tetrahedra. In the second O site, O(2) is bonded to two equivalent Ho(1) and two equivalent Ge(1) atoms to form distorted OHo2Ge2 tetrahedra that share corners with two equivalent O(1)Ho4 tetrahedra, corners with twelve equivalent O(2)Ho2Ge2 tetrahedra,  an edgeedge with one O(1)Ho4 tetrahedra, and edges with four equivalent O(2)Ho2Ge2 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ho2Ge2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.991
_cell_length_b   6.991
_cell_length_c   6.991
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   241.558
_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
  Ho  Ho0  1  0.125  0.625  0.625  1.0
  Ho  Ho1  1  0.625  0.625  0.625  1.0
  Ho  Ho2  1  0.625  0.125  0.625  1.0
  Ho  Ho3  1  0.625  0.625  0.125  1.0
  Ge  Ge4  1  0.125  0.625  0.125  1.0
  Ge  Ge5  1  0.125  0.125  0.625  1.0
  Ge  Ge6  1  0.625  0.125  0.125  1.0
  Ge  Ge7  1  0.125  0.125  0.125  1.0
  O  O8  1  0.750  0.750  0.750  1.0
  O  O9  1  0.202  0.798  0.798  1.0
  O  O10  1  0.202  0.798  0.202  1.0
  O  O11  1  0.798  0.798  0.202  1.0
  O  O12  1  0.798  0.202  0.798  1.0
  O  O13  1  0.202  0.202  0.798  1.0
  O  O14  1  0.452  0.048  0.048  1.0
  O  O15  1  0.798  0.202  0.202  1.0
  O  O16  1  0.048  0.048  0.452  1.0
  O  O17  1  0.452  0.048  0.452  1.0
  O  O18  1  0.048  0.452  0.048  1.0
  O  O19  1  0.452  0.452  0.048  1.0
  O  O20  1  0.048  0.452  0.452  1.0
  O  O21  1  0.500  0.500  0.500  1.0
[/CIF]
.