The structure described by K2ZrGe2O7 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(1), three equivalent O(2), and three equivalent O(4) atoms. Zr(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form ZrO6 octahedra that share corners with six equivalent Ge(1)O4 tetrahedra. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with three equivalent Zr(1)O6 octahedra and  a cornercorner with one Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 19-51°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent K(1), one Zr(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent K(1), one Zr(1), and one Ge(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent K(1) and two equivalent Ge(1) atoms. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to three equivalent K(1), one Zr(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_K2ZrGe2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.794
_cell_length_b   5.794
_cell_length_c   13.199
_cell_angle_alpha   77.151
_cell_angle_beta   77.151
_cell_angle_gamma   58.335
_symmetry_Int_Tables_number   1
_cell_volume   364.645
_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
  K  K0  1  0.641  0.065  0.178  1.0
  K  K1  1  0.935  0.359  0.322  1.0
  K  K2  1  0.359  0.935  0.822  1.0
  K  K3  1  0.065  0.641  0.678  1.0
  Zr  Zr4  1  0.500  0.000  0.500  1.0
  Zr  Zr5  1  0.000  0.500  0.000  1.0
  Ge  Ge6  1  0.758  0.317  0.622  1.0
  Ge  Ge7  1  0.317  0.758  0.122  1.0
  Ge  Ge8  1  0.242  0.683  0.378  1.0
  Ge  Ge9  1  0.683  0.242  0.878  1.0
  O  O10  1  0.812  0.924  0.956  1.0
  O  O11  1  0.328  0.423  0.873  1.0
  O  O12  1  0.423  0.328  0.373  1.0
  O  O13  1  0.672  0.577  0.127  1.0
  O  O14  1  0.860  0.140  0.750  1.0
  O  O15  1  0.140  0.860  0.250  1.0
  O  O16  1  0.213  0.537  0.101  1.0
  O  O17  1  0.463  0.787  0.399  1.0
  O  O18  1  0.076  0.188  0.544  1.0
  O  O19  1  0.537  0.213  0.601  1.0
  O  O20  1  0.188  0.076  0.044  1.0
  O  O21  1  0.924  0.812  0.456  1.0
  O  O22  1  0.787  0.463  0.899  1.0
  O  O23  1  0.577  0.672  0.627  1.0
[/CIF]
.
The structure described by K2ZrGe2O7 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(1), three equivalent O(2), and three equivalent O(4) atoms. Zr(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form ZrO6 octahedra that share corners with six equivalent Ge(1)O4 tetrahedra. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with three equivalent Zr(1)O6 octahedra and  a cornercorner with one Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 19-51°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent K(1), one Zr(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent K(1), one Zr(1), and one Ge(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent K(1) and two equivalent Ge(1) atoms. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to three equivalent K(1), one Zr(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_K2ZrGe2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.794
_cell_length_b   5.794
_cell_length_c   13.199
_cell_angle_alpha   77.151
_cell_angle_beta   77.151
_cell_angle_gamma   58.335
_symmetry_Int_Tables_number   1
_cell_volume   364.645
_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
  K  K0  1  0.641  0.065  0.178  1.0
  K  K1  1  0.935  0.359  0.322  1.0
  K  K2  1  0.359  0.935  0.822  1.0
  K  K3  1  0.065  0.641  0.678  1.0
  Zr  Zr4  1  0.500  0.000  0.500  1.0
  Zr  Zr5  1  0.000  0.500  0.000  1.0
  Ge  Ge6  1  0.758  0.317  0.622  1.0
  Ge  Ge7  1  0.317  0.758  0.122  1.0
  Ge  Ge8  1  0.242  0.683  0.378  1.0
  Ge  Ge9  1  0.683  0.242  0.878  1.0
  O  O10  1  0.812  0.924  0.956  1.0
  O  O11  1  0.328  0.423  0.873  1.0
  O  O12  1  0.423  0.328  0.373  1.0
  O  O13  1  0.672  0.577  0.127  1.0
  O  O14  1  0.860  0.140  0.750  1.0
  O  O15  1  0.140  0.860  0.250  1.0
  O  O16  1  0.213  0.537  0.101  1.0
  O  O17  1  0.463  0.787  0.399  1.0
  O  O18  1  0.076  0.188  0.544  1.0
  O  O19  1  0.537  0.213  0.601  1.0
  O  O20  1  0.188  0.076  0.044  1.0
  O  O21  1  0.924  0.812  0.456  1.0
  O  O22  1  0.787  0.463  0.899  1.0
  O  O23  1  0.577  0.672  0.627  1.0
[/CIF]
.