The crystal structure described by Ni(GeO3)2 crystallizes in the monoclinic P2_1/c space group. Ni(1) is bonded to one O(3), one O(4), two equivalent O(5), and two equivalent O(6) atoms to form NiO6 octahedra that share corners with three equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O5 trigonal bipyramids, edges with two equivalent Ni(1)O6 octahedra, and  an edgeedge with one Ge(2)O5 trigonal bipyramid. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(4), one O(5), and two equivalent O(2) atoms to form GeO4 tetrahedra that share corners with three equivalent Ni(1)O6 octahedra and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-61°. In the second Ge site, Ge(2) is bonded to one O(6), two equivalent O(1), and two equivalent O(3) atoms to form GeO5 trigonal bipyramids that share corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Ge(2)O5 trigonal bipyramids,  an edgeedge with one Ni(1)O6 octahedra, and  an edgeedge with one Ge(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 36-45°. There are six inequivalent O sites. In the first O site, O(6) is bonded in a trigonal non-coplanar geometry to two equivalent Ni(1) and one Ge(2) atom. In the second O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Ge(2) atoms. In the third O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Ge(1) atoms. In the fourth O site, O(3) is bonded in a distorted T-shaped geometry to one Ni(1) and two equivalent Ge(2) atoms. In the fifth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Ni(1) and one Ge(1) atom. In the sixth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Ni(1) and one Ge(1) atom. is represented by the CIF file [CIF]
data_Ni(GeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.974
_cell_length_b   5.370
_cell_length_c   10.128
_cell_angle_alpha   74.659
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   470.704
_cell_formula_units_Z   4
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
  Ni  Ni0  1  0.663  0.004  0.234  1.0
  Ni  Ni1  1  0.163  0.496  0.766  1.0
  Ni  Ni2  1  0.337  0.996  0.766  1.0
  Ni  Ni3  1  0.837  0.504  0.234  1.0
  Ge  Ge4  1  0.342  0.138  0.055  1.0
  Ge  Ge5  1  0.842  0.362  0.945  1.0
  Ge  Ge6  1  0.658  0.862  0.945  1.0
  Ge  Ge7  1  0.158  0.638  0.055  1.0
  Ge  Ge8  1  0.348  0.892  0.487  1.0
  Ge  Ge9  1  0.848  0.608  0.513  1.0
  Ge  Ge10  1  0.652  0.108  0.513  1.0
  Ge  Ge11  1  0.152  0.392  0.487  1.0
  O  O12  1  0.266  0.661  0.406  1.0
  O  O13  1  0.766  0.839  0.594  1.0
  O  O14  1  0.734  0.339  0.594  1.0
  O  O15  1  0.234  0.161  0.406  1.0
  O  O16  1  0.303  0.804  0.114  1.0
  O  O17  1  0.803  0.696  0.886  1.0
  O  O18  1  0.697  0.196  0.886  1.0
  O  O19  1  0.197  0.304  0.114  1.0
  O  O20  1  0.967  0.382  0.416  1.0
  O  O21  1  0.467  0.118  0.584  1.0
  O  O22  1  0.033  0.618  0.584  1.0
  O  O23  1  0.533  0.882  0.416  1.0
  O  O24  1  0.986  0.708  0.120  1.0
  O  O25  1  0.486  0.792  0.880  1.0
  O  O26  1  0.014  0.292  0.880  1.0
  O  O27  1  0.514  0.208  0.120  1.0
  O  O28  1  0.338  0.248  0.871  1.0
  O  O29  1  0.838  0.252  0.129  1.0
  O  O30  1  0.662  0.752  0.129  1.0
  O  O31  1  0.162  0.748  0.871  1.0
  O  O32  1  0.312  0.734  0.667  1.0
  O  O33  1  0.812  0.766  0.333  1.0
  O  O34  1  0.688  0.266  0.333  1.0
  O  O35  1  0.188  0.234  0.667  1.0
[/CIF]
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The crystal structure described by Ni(GeO3)2 crystallizes in the monoclinic P2_1/c space group. Ni(1) is bonded to one O(3), one O(4), two equivalent O(5), and two equivalent O(6) atoms to form NiO6 octahedra that share corners with three equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O5 trigonal bipyramids, edges with two equivalent Ni(1)O6 octahedra, and  an edgeedge with one Ge(2)O5 trigonal bipyramid. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(4), one O(5), and two equivalent O(2) atoms to form GeO4 tetrahedra that share corners with three equivalent Ni(1)O6 octahedra and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-61°. In the second Ge site, Ge(2) is bonded to one O(6), two equivalent O(1), and two equivalent O(3) atoms to form GeO5 trigonal bipyramids that share corners with two equivalent Ni(1)O6 octahedra, corners with two equivalent Ge(2)O5 trigonal bipyramids,  an edgeedge with one Ni(1)O6 octahedra, and  an edgeedge with one Ge(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 36-45°. There are six inequivalent O sites. In the first O site, O(6) is bonded in a trigonal non-coplanar geometry to two equivalent Ni(1) and one Ge(2) atom. In the second O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Ge(2) atoms. In the third O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Ge(1) atoms. In the fourth O site, O(3) is bonded in a distorted T-shaped geometry to one Ni(1) and two equivalent Ge(2) atoms. In the fifth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Ni(1) and one Ge(1) atom. In the sixth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Ni(1) and one Ge(1) atom. is represented by the CIF file [CIF]
data_Ni(GeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.974
_cell_length_b   5.370
_cell_length_c   10.128
_cell_angle_alpha   74.659
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   470.704
_cell_formula_units_Z   4
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
  Ni  Ni0  1  0.663  0.004  0.234  1.0
  Ni  Ni1  1  0.163  0.496  0.766  1.0
  Ni  Ni2  1  0.337  0.996  0.766  1.0
  Ni  Ni3  1  0.837  0.504  0.234  1.0
  Ge  Ge4  1  0.342  0.138  0.055  1.0
  Ge  Ge5  1  0.842  0.362  0.945  1.0
  Ge  Ge6  1  0.658  0.862  0.945  1.0
  Ge  Ge7  1  0.158  0.638  0.055  1.0
  Ge  Ge8  1  0.348  0.892  0.487  1.0
  Ge  Ge9  1  0.848  0.608  0.513  1.0
  Ge  Ge10  1  0.652  0.108  0.513  1.0
  Ge  Ge11  1  0.152  0.392  0.487  1.0
  O  O12  1  0.266  0.661  0.406  1.0
  O  O13  1  0.766  0.839  0.594  1.0
  O  O14  1  0.734  0.339  0.594  1.0
  O  O15  1  0.234  0.161  0.406  1.0
  O  O16  1  0.303  0.804  0.114  1.0
  O  O17  1  0.803  0.696  0.886  1.0
  O  O18  1  0.697  0.196  0.886  1.0
  O  O19  1  0.197  0.304  0.114  1.0
  O  O20  1  0.967  0.382  0.416  1.0
  O  O21  1  0.467  0.118  0.584  1.0
  O  O22  1  0.033  0.618  0.584  1.0
  O  O23  1  0.533  0.882  0.416  1.0
  O  O24  1  0.986  0.708  0.120  1.0
  O  O25  1  0.486  0.792  0.880  1.0
  O  O26  1  0.014  0.292  0.880  1.0
  O  O27  1  0.514  0.208  0.120  1.0
  O  O28  1  0.338  0.248  0.871  1.0
  O  O29  1  0.838  0.252  0.129  1.0
  O  O30  1  0.662  0.752  0.129  1.0
  O  O31  1  0.162  0.748  0.871  1.0
  O  O32  1  0.312  0.734  0.667  1.0
  O  O33  1  0.812  0.766  0.333  1.0
  O  O34  1  0.688  0.266  0.333  1.0
  O  O35  1  0.188  0.234  0.667  1.0
[/CIF]
.