The compound described by CrZn(GeO3)2 crystallizes in the monoclinic P2_1/c space group. Cr(1) is bonded to one O(3), one O(4), two equivalent O(5), and two equivalent O(6) atoms to form CrO6 octahedra that share corners with three equivalent Ge(1)O4 tetrahedra, corners with three equivalent Ge(2)O4 tetrahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with three equivalent Zn(1)O6 octahedra. Zn(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form ZnO6 octahedra that share corners with two equivalent Ge(2)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra, edges with three equivalent Cr(1)O6 octahedra, and  an edgeedge with one Ge(2)O4 tetrahedra. 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 Cr(1)O6 octahedra, corners with four equivalent Zn(1)O6 octahedra, and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-69°. In the second Ge site, Ge(2) is bonded to one O(3), one O(6), and two equivalent O(1) atoms to form GeO4 tetrahedra that share corners with two equivalent Zn(1)O6 octahedra, corners with three equivalent Cr(1)O6 octahedra, corners with two equivalent Ge(2)O4 tetrahedra, and  an edgeedge with one Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 32-60°. There are six inequivalent O sites. In the first O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Cr(1), one Zn(1), and one Ge(1) atom. In the second O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Cr(1), one Zn(1), and one Ge(2) atom. In the third O site, O(1) is bonded in a 3-coordinate geometry to one Zn(1) and two equivalent Ge(2) atoms. In the fourth O site, O(2) is bonded in a trigonal planar geometry to one Zn(1) and two equivalent Ge(1) atoms. In the fifth O site, O(3) is bonded in a T-shaped geometry to one Cr(1), one Zn(1), and one Ge(2) atom. In the sixth O site, O(4) is bonded in a trigonal planar geometry to one Cr(1), one Zn(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_ZnCr(GeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.104
_cell_length_b   5.577
_cell_length_c   10.047
_cell_angle_alpha   74.131
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   490.647
_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
  Zn  Zn0  1  0.489  0.550  0.244  1.0
  Zn  Zn1  1  0.989  0.950  0.756  1.0
  Zn  Zn2  1  0.511  0.450  0.756  1.0
  Zn  Zn3  1  0.011  0.051  0.244  1.0
  Cr  Cr4  1  0.657  0.041  0.247  1.0
  Cr  Cr5  1  0.157  0.459  0.753  1.0
  Cr  Cr6  1  0.343  0.959  0.753  1.0
  Cr  Cr7  1  0.843  0.541  0.247  1.0
  Ge  Ge8  1  0.337  0.186  0.058  1.0
  Ge  Ge9  1  0.837  0.314  0.942  1.0
  Ge  Ge10  1  0.663  0.814  0.942  1.0
  Ge  Ge11  1  0.163  0.686  0.058  1.0
  Ge  Ge12  1  0.342  0.748  0.454  1.0
  Ge  Ge13  1  0.842  0.752  0.546  1.0
  Ge  Ge14  1  0.658  0.252  0.546  1.0
  Ge  Ge15  1  0.158  0.248  0.454  1.0
  O  O16  1  0.283  0.500  0.381  1.0
  O  O17  1  0.783  1.000  0.619  1.0
  O  O18  1  0.717  0.500  0.619  1.0
  O  O19  1  0.217  0.000  0.381  1.0
  O  O20  1  0.322  0.843  0.109  1.0
  O  O21  1  0.822  0.657  0.891  1.0
  O  O22  1  0.678  0.157  0.891  1.0
  O  O23  1  0.178  0.343  0.109  1.0
  O  O24  1  0.988  0.295  0.372  1.0
  O  O25  1  0.488  0.205  0.628  1.0
  O  O26  1  0.012  0.705  0.628  1.0
  O  O27  1  0.512  0.795  0.372  1.0
  O  O28  1  0.015  0.774  0.145  1.0
  O  O29  1  0.515  0.726  0.855  1.0
  O  O30  1  0.985  0.226  0.855  1.0
  O  O31  1  0.485  0.274  0.145  1.0
  O  O32  1  0.336  0.266  0.876  1.0
  O  O33  1  0.836  0.234  0.124  1.0
  O  O34  1  0.664  0.734  0.124  1.0
  O  O35  1  0.164  0.766  0.876  1.0
  O  O36  1  0.339  0.662  0.635  1.0
  O  O37  1  0.839  0.838  0.365  1.0
  O  O38  1  0.661  0.338  0.365  1.0
  O  O39  1  0.161  0.162  0.635  1.0
[/CIF]
.
The compound described by CrZn(GeO3)2 crystallizes in the monoclinic P2_1/c space group. Cr(1) is bonded to one O(3), one O(4), two equivalent O(5), and two equivalent O(6) atoms to form CrO6 octahedra that share corners with three equivalent Ge(1)O4 tetrahedra, corners with three equivalent Ge(2)O4 tetrahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with three equivalent Zn(1)O6 octahedra. Zn(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form ZnO6 octahedra that share corners with two equivalent Ge(2)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra, edges with three equivalent Cr(1)O6 octahedra, and  an edgeedge with one Ge(2)O4 tetrahedra. 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 Cr(1)O6 octahedra, corners with four equivalent Zn(1)O6 octahedra, and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-69°. In the second Ge site, Ge(2) is bonded to one O(3), one O(6), and two equivalent O(1) atoms to form GeO4 tetrahedra that share corners with two equivalent Zn(1)O6 octahedra, corners with three equivalent Cr(1)O6 octahedra, corners with two equivalent Ge(2)O4 tetrahedra, and  an edgeedge with one Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 32-60°. There are six inequivalent O sites. In the first O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Cr(1), one Zn(1), and one Ge(1) atom. In the second O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Cr(1), one Zn(1), and one Ge(2) atom. In the third O site, O(1) is bonded in a 3-coordinate geometry to one Zn(1) and two equivalent Ge(2) atoms. In the fourth O site, O(2) is bonded in a trigonal planar geometry to one Zn(1) and two equivalent Ge(1) atoms. In the fifth O site, O(3) is bonded in a T-shaped geometry to one Cr(1), one Zn(1), and one Ge(2) atom. In the sixth O site, O(4) is bonded in a trigonal planar geometry to one Cr(1), one Zn(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_ZnCr(GeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.104
_cell_length_b   5.577
_cell_length_c   10.047
_cell_angle_alpha   74.131
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   490.647
_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
  Zn  Zn0  1  0.489  0.550  0.244  1.0
  Zn  Zn1  1  0.989  0.950  0.756  1.0
  Zn  Zn2  1  0.511  0.450  0.756  1.0
  Zn  Zn3  1  0.011  0.051  0.244  1.0
  Cr  Cr4  1  0.657  0.041  0.247  1.0
  Cr  Cr5  1  0.157  0.459  0.753  1.0
  Cr  Cr6  1  0.343  0.959  0.753  1.0
  Cr  Cr7  1  0.843  0.541  0.247  1.0
  Ge  Ge8  1  0.337  0.186  0.058  1.0
  Ge  Ge9  1  0.837  0.314  0.942  1.0
  Ge  Ge10  1  0.663  0.814  0.942  1.0
  Ge  Ge11  1  0.163  0.686  0.058  1.0
  Ge  Ge12  1  0.342  0.748  0.454  1.0
  Ge  Ge13  1  0.842  0.752  0.546  1.0
  Ge  Ge14  1  0.658  0.252  0.546  1.0
  Ge  Ge15  1  0.158  0.248  0.454  1.0
  O  O16  1  0.283  0.500  0.381  1.0
  O  O17  1  0.783  1.000  0.619  1.0
  O  O18  1  0.717  0.500  0.619  1.0
  O  O19  1  0.217  0.000  0.381  1.0
  O  O20  1  0.322  0.843  0.109  1.0
  O  O21  1  0.822  0.657  0.891  1.0
  O  O22  1  0.678  0.157  0.891  1.0
  O  O23  1  0.178  0.343  0.109  1.0
  O  O24  1  0.988  0.295  0.372  1.0
  O  O25  1  0.488  0.205  0.628  1.0
  O  O26  1  0.012  0.705  0.628  1.0
  O  O27  1  0.512  0.795  0.372  1.0
  O  O28  1  0.015  0.774  0.145  1.0
  O  O29  1  0.515  0.726  0.855  1.0
  O  O30  1  0.985  0.226  0.855  1.0
  O  O31  1  0.485  0.274  0.145  1.0
  O  O32  1  0.336  0.266  0.876  1.0
  O  O33  1  0.836  0.234  0.124  1.0
  O  O34  1  0.664  0.734  0.124  1.0
  O  O35  1  0.164  0.766  0.876  1.0
  O  O36  1  0.339  0.662  0.635  1.0
  O  O37  1  0.839  0.838  0.365  1.0
  O  O38  1  0.661  0.338  0.365  1.0
  O  O39  1  0.161  0.162  0.635  1.0
[/CIF]
.