The material described by CuZn(GeO3)2 crystallizes in the monoclinic P2_1/c space group. Cu(1) is bonded to one O(3), one O(4), two equivalent O(5), and two equivalent O(6) atoms to form distorted CuO6 octahedra that share corners with three equivalent Ge(1)O4 tetrahedra, corners with three equivalent Ge(2)O4 tetrahedra, and edges with two equivalent Cu(1)O6 octahedra. Zn(1) is bonded in a 4-coordinate geometry to one O(3), one O(4), one O(5), and one O(6) atom. 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 Cu(1)O6 octahedra and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 53-66°. 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 three equivalent Cu(1)O6 octahedra and corners with two equivalent Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 37-62°. 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 Cu(1), one Zn(1), and one Ge(1) atom. In the second O site, O(6) is bonded to two equivalent Cu(1), one Zn(1), and one Ge(2) atom to form distorted corner-sharing OZnCu2Ge tetrahedra. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Ge(2) atoms. In the fourth O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Ge(1) atoms. In the fifth O site, O(3) is bonded in a distorted T-shaped geometry to one Cu(1), one Zn(1), and one Ge(2) atom. In the sixth O site, O(4) is bonded in a distorted trigonal planar geometry to one Cu(1), one Zn(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_ZnCu(GeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.451
_cell_length_b   5.435
_cell_length_c   9.622
_cell_angle_alpha   80.604
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   487.601
_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  0.505  0.548  0.250  1.0
  Zn  Zn1  1  0.005  0.952  0.750  1.0
  Zn  Zn2  1  0.495  0.452  0.750  1.0
  Zn  Zn3  1  0.995  0.048  0.250  1.0
  Cu  Cu4  1  0.650  0.040  0.242  1.0
  Cu  Cu5  1  0.150  0.460  0.758  1.0
  Cu  Cu6  1  0.350  0.960  0.758  1.0
  Cu  Cu7  1  0.850  0.540  0.242  1.0
  Ge  Ge8  1  0.339  0.173  0.060  1.0
  Ge  Ge9  1  0.839  0.327  0.940  1.0
  Ge  Ge10  1  0.661  0.827  0.940  1.0
  Ge  Ge11  1  0.161  0.673  0.060  1.0
  Ge  Ge12  1  0.340  0.764  0.461  1.0
  Ge  Ge13  1  0.840  0.736  0.539  1.0
  Ge  Ge14  1  0.660  0.236  0.539  1.0
  Ge  Ge15  1  0.160  0.264  0.461  1.0
  O  O16  1  0.274  0.508  0.386  1.0
  O  O17  1  0.774  0.992  0.614  1.0
  O  O18  1  0.726  0.492  0.614  1.0
  O  O19  1  0.226  0.008  0.386  1.0
  O  O20  1  0.311  0.843  0.110  1.0
  O  O21  1  0.811  0.657  0.890  1.0
  O  O22  1  0.689  0.157  0.890  1.0
  O  O23  1  0.189  0.343  0.110  1.0
  O  O24  1  0.991  0.286  0.386  1.0
  O  O25  1  0.491  0.214  0.614  1.0
  O  O26  1  0.009  0.714  0.614  1.0
  O  O27  1  0.509  0.786  0.386  1.0
  O  O28  1  0.011  0.768  0.145  1.0
  O  O29  1  0.511  0.732  0.855  1.0
  O  O30  1  0.989  0.232  0.855  1.0
  O  O31  1  0.489  0.268  0.145  1.0
  O  O32  1  0.350  0.226  0.873  1.0
  O  O33  1  0.850  0.274  0.127  1.0
  O  O34  1  0.650  0.774  0.127  1.0
  O  O35  1  0.150  0.726  0.873  1.0
  O  O36  1  0.330  0.690  0.649  1.0
  O  O37  1  0.830  0.810  0.351  1.0
  O  O38  1  0.670  0.310  0.351  1.0
  O  O39  1  0.170  0.190  0.649  1.0
[/CIF]
.
The material described by CuZn(GeO3)2 crystallizes in the monoclinic P2_1/c space group. Cu(1) is bonded to one O(3), one O(4), two equivalent O(5), and two equivalent O(6) atoms to form distorted CuO6 octahedra that share corners with three equivalent Ge(1)O4 tetrahedra, corners with three equivalent Ge(2)O4 tetrahedra, and edges with two equivalent Cu(1)O6 octahedra. Zn(1) is bonded in a 4-coordinate geometry to one O(3), one O(4), one O(5), and one O(6) atom. 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 Cu(1)O6 octahedra and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 53-66°. 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 three equivalent Cu(1)O6 octahedra and corners with two equivalent Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 37-62°. 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 Cu(1), one Zn(1), and one Ge(1) atom. In the second O site, O(6) is bonded to two equivalent Cu(1), one Zn(1), and one Ge(2) atom to form distorted corner-sharing OZnCu2Ge tetrahedra. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Ge(2) atoms. In the fourth O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Ge(1) atoms. In the fifth O site, O(3) is bonded in a distorted T-shaped geometry to one Cu(1), one Zn(1), and one Ge(2) atom. In the sixth O site, O(4) is bonded in a distorted trigonal planar geometry to one Cu(1), one Zn(1), and one Ge(1) atom. is represented by the CIF file [CIF]
data_ZnCu(GeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.451
_cell_length_b   5.435
_cell_length_c   9.622
_cell_angle_alpha   80.604
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   487.601
_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  0.505  0.548  0.250  1.0
  Zn  Zn1  1  0.005  0.952  0.750  1.0
  Zn  Zn2  1  0.495  0.452  0.750  1.0
  Zn  Zn3  1  0.995  0.048  0.250  1.0
  Cu  Cu4  1  0.650  0.040  0.242  1.0
  Cu  Cu5  1  0.150  0.460  0.758  1.0
  Cu  Cu6  1  0.350  0.960  0.758  1.0
  Cu  Cu7  1  0.850  0.540  0.242  1.0
  Ge  Ge8  1  0.339  0.173  0.060  1.0
  Ge  Ge9  1  0.839  0.327  0.940  1.0
  Ge  Ge10  1  0.661  0.827  0.940  1.0
  Ge  Ge11  1  0.161  0.673  0.060  1.0
  Ge  Ge12  1  0.340  0.764  0.461  1.0
  Ge  Ge13  1  0.840  0.736  0.539  1.0
  Ge  Ge14  1  0.660  0.236  0.539  1.0
  Ge  Ge15  1  0.160  0.264  0.461  1.0
  O  O16  1  0.274  0.508  0.386  1.0
  O  O17  1  0.774  0.992  0.614  1.0
  O  O18  1  0.726  0.492  0.614  1.0
  O  O19  1  0.226  0.008  0.386  1.0
  O  O20  1  0.311  0.843  0.110  1.0
  O  O21  1  0.811  0.657  0.890  1.0
  O  O22  1  0.689  0.157  0.890  1.0
  O  O23  1  0.189  0.343  0.110  1.0
  O  O24  1  0.991  0.286  0.386  1.0
  O  O25  1  0.491  0.214  0.614  1.0
  O  O26  1  0.009  0.714  0.614  1.0
  O  O27  1  0.509  0.786  0.386  1.0
  O  O28  1  0.011  0.768  0.145  1.0
  O  O29  1  0.511  0.732  0.855  1.0
  O  O30  1  0.989  0.232  0.855  1.0
  O  O31  1  0.489  0.268  0.145  1.0
  O  O32  1  0.350  0.226  0.873  1.0
  O  O33  1  0.850  0.274  0.127  1.0
  O  O34  1  0.650  0.774  0.127  1.0
  O  O35  1  0.150  0.726  0.873  1.0
  O  O36  1  0.330  0.690  0.649  1.0
  O  O37  1  0.830  0.810  0.351  1.0
  O  O38  1  0.670  0.310  0.351  1.0
  O  O39  1  0.170  0.190  0.649  1.0
[/CIF]
.