The structure described by Hf3GeO8 crystallizes in the tetragonal I-42m space group. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. In the second Hf site, Hf(2) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. Ge(1) is bonded in a tetrahedral geometry to four equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Hf(2) and two equivalent Hf(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Hf(2), two equivalent Hf(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_Hf3GeO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.270
_cell_length_b   6.270
_cell_length_c   6.270
_cell_angle_alpha   133.340
_cell_angle_beta   133.340
_cell_angle_gamma   68.121
_symmetry_Int_Tables_number   1
_cell_volume   128.082
_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
  Hf  Hf0  1  0.250  0.750  0.500  1.0
  Hf  Hf1  1  0.750  0.250  0.500  1.0
  Hf  Hf2  1  0.500  0.500  0.000  1.0
  Ge  Ge3  1  0.000  0.000  0.000  1.0
  O  O4  1  0.538  0.143  0.000  1.0
  O  O5  1  0.143  0.538  0.000  1.0
  O  O6  1  0.857  0.857  0.394  1.0
  O  O7  1  0.462  0.462  0.606  1.0
  O  O8  1  0.305  0.873  0.000  1.0
  O  O9  1  0.873  0.305  0.000  1.0
  O  O10  1  0.127  0.127  0.432  1.0
  O  O11  1  0.695  0.695  0.568  1.0
[/CIF]
.
The structure described by Hf3GeO8 crystallizes in the tetragonal I-42m space group. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. In the second Hf site, Hf(2) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. Ge(1) is bonded in a tetrahedral geometry to four equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Hf(2) and two equivalent Hf(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Hf(2), two equivalent Hf(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_Hf3GeO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.270
_cell_length_b   6.270
_cell_length_c   6.270
_cell_angle_alpha   133.340
_cell_angle_beta   133.340
_cell_angle_gamma   68.121
_symmetry_Int_Tables_number   1
_cell_volume   128.082
_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
  Hf  Hf0  1  0.250  0.750  0.500  1.0
  Hf  Hf1  1  0.750  0.250  0.500  1.0
  Hf  Hf2  1  0.500  0.500  0.000  1.0
  Ge  Ge3  1  0.000  0.000  0.000  1.0
  O  O4  1  0.538  0.143  0.000  1.0
  O  O5  1  0.143  0.538  0.000  1.0
  O  O6  1  0.857  0.857  0.394  1.0
  O  O7  1  0.462  0.462  0.606  1.0
  O  O8  1  0.305  0.873  0.000  1.0
  O  O9  1  0.873  0.305  0.000  1.0
  O  O10  1  0.127  0.127  0.432  1.0
  O  O11  1  0.695  0.695  0.568  1.0
[/CIF]
.