The crystal structure described by CaCu2(GeO3)4 crystallizes in the monoclinic P2_1 space group. Ca(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(12), one O(2), one O(3), one O(6), and one O(8) atom. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(10), one O(11), one O(12), one O(6), one O(8), and one O(9) atom to form distorted CuO6 octahedra that share  a cornercorner with one Ge(2)O4 tetrahedra, corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(3)O5 trigonal bipyramids, edges with two equivalent Cu(2)O6 octahedra, and  an edgeedge with one Ge(4)O5 trigonal bipyramid. In the second Cu site, Cu(2) is bonded to one O(10), one O(11), one O(12), one O(5), one O(7), and one O(9) atom to form distorted CuO6 octahedra that share  a cornercorner with one Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra, corners with two equivalent Ge(4)O5 trigonal bipyramids, edges with two equivalent Cu(1)O6 octahedra, and  an edgeedge with one Ge(3)O5 trigonal bipyramid. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(3), one O(4), one O(8), and one O(9) atom to form GeO4 tetrahedra that share  a cornercorner with one Cu(2)O6 octahedra, corners with two equivalent Cu(1)O6 octahedra, and corners with two equivalent Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-65°. In the second Ge site, Ge(2) is bonded to one O(10), one O(3), one O(4), and one O(7) atom to form GeO4 tetrahedra that share  a cornercorner with one Cu(1)O6 octahedra, corners with two equivalent Cu(2)O6 octahedra, and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-69°. In the third Ge site, Ge(3) is bonded to one O(1), one O(11), one O(2), one O(5), and one O(6) atom to form GeO5 trigonal bipyramids that share corners with two equivalent Cu(1)O6 octahedra, corners with two equivalent Ge(4)O5 trigonal bipyramids,  an edgeedge with one Cu(2)O6 octahedra, and  an edgeedge with one Ge(4)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 42°. In the fourth Ge site, Ge(4) is bonded to one O(1), one O(12), one O(2), one O(5), and one O(6) atom to form GeO5 trigonal bipyramids that share corners with two equivalent Cu(2)O6 octahedra, corners with two equivalent Ge(3)O5 trigonal bipyramids,  an edgeedge with one Cu(1)O6 octahedra, and  an edgeedge with one Ge(3)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 44-47°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Ca(1), one Ge(3), and one Ge(4) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1), one Ge(3), and one Ge(4) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Ca(1), one Ge(1), and one Ge(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Cu(2), one Ge(3), and one Ge(4) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Cu(1), one Ge(3), and one Ge(4) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Cu(2) and one Ge(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Ca(1), one Cu(1), and one Ge(1) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Cu(1), one Cu(2), and one Ge(1) atom. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Cu(1), one Cu(2), and one Ge(2) atom. In the eleventh O site, O(11) is bonded in a trigonal non-coplanar geometry to one Cu(1), one Cu(2), and one Ge(3) atom. In the twelfth O site, O(12) is bonded in a distorted tetrahedral geometry to one Ca(1), one Cu(1), one Cu(2), and one Ge(4) atom. is represented by the CIF card [CIF]
data_CaCu2(GeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.150
_cell_length_b   5.290
_cell_length_c   10.211
_cell_angle_alpha   75.353
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   478.194
_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
  Ca  Ca0  1  0.551  0.766  0.289  1.0
  Ca  Ca1  1  0.051  0.234  0.711  1.0
  Cu  Cu2  1  0.340  0.260  0.230  1.0
  Cu  Cu3  1  0.840  0.740  0.770  1.0
  Cu  Cu4  1  0.651  0.252  0.767  1.0
  Cu  Cu5  1  0.151  0.748  0.233  1.0
  Ge  Ge6  1  0.653  0.390  0.053  1.0
  Ge  Ge7  1  0.153  0.610  0.947  1.0
  Ge  Ge8  1  0.353  0.112  0.946  1.0
  Ge  Ge9  1  0.853  0.888  0.054  1.0
  Ge  Ge10  1  0.647  0.166  0.491  1.0
  Ge  Ge11  1  0.147  0.834  0.509  1.0
  Ge  Ge12  1  0.348  0.332  0.514  1.0
  Ge  Ge13  1  0.848  0.668  0.486  1.0
  O  O14  1  0.734  0.932  0.408  1.0
  O  O15  1  0.234  0.068  0.592  1.0
  O  O16  1  0.248  0.551  0.598  1.0
  O  O17  1  0.748  0.449  0.402  1.0
  O  O18  1  0.697  0.049  0.107  1.0
  O  O19  1  0.197  0.951  0.893  1.0
  O  O20  1  0.301  0.442  0.895  1.0
  O  O21  1  0.801  0.558  0.105  1.0
  O  O22  1  0.026  0.600  0.432  1.0
  O  O23  1  0.526  0.400  0.568  1.0
  O  O24  1  0.972  0.902  0.581  1.0
  O  O25  1  0.472  0.098  0.419  1.0
  O  O26  1  0.006  0.966  0.139  1.0
  O  O27  1  0.506  0.034  0.861  1.0
  O  O28  1  0.003  0.531  0.855  1.0
  O  O29  1  0.503  0.469  0.145  1.0
  O  O30  1  0.645  0.488  0.873  1.0
  O  O31  1  0.145  0.512  0.127  1.0
  O  O32  1  0.369  0.014  0.128  1.0
  O  O33  1  0.869  0.986  0.872  1.0
  O  O34  1  0.692  0.999  0.669  1.0
  O  O35  1  0.192  0.001  0.331  1.0
  O  O36  1  0.312  0.515  0.332  1.0
  O  O37  1  0.812  0.485  0.668  1.0
[/CIF]
.
The crystal structure described by CaCu2(GeO3)4 crystallizes in the monoclinic P2_1 space group. Ca(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(12), one O(2), one O(3), one O(6), and one O(8) atom. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(10), one O(11), one O(12), one O(6), one O(8), and one O(9) atom to form distorted CuO6 octahedra that share  a cornercorner with one Ge(2)O4 tetrahedra, corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(3)O5 trigonal bipyramids, edges with two equivalent Cu(2)O6 octahedra, and  an edgeedge with one Ge(4)O5 trigonal bipyramid. In the second Cu site, Cu(2) is bonded to one O(10), one O(11), one O(12), one O(5), one O(7), and one O(9) atom to form distorted CuO6 octahedra that share  a cornercorner with one Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra, corners with two equivalent Ge(4)O5 trigonal bipyramids, edges with two equivalent Cu(1)O6 octahedra, and  an edgeedge with one Ge(3)O5 trigonal bipyramid. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(3), one O(4), one O(8), and one O(9) atom to form GeO4 tetrahedra that share  a cornercorner with one Cu(2)O6 octahedra, corners with two equivalent Cu(1)O6 octahedra, and corners with two equivalent Ge(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-65°. In the second Ge site, Ge(2) is bonded to one O(10), one O(3), one O(4), and one O(7) atom to form GeO4 tetrahedra that share  a cornercorner with one Cu(1)O6 octahedra, corners with two equivalent Cu(2)O6 octahedra, and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 51-69°. In the third Ge site, Ge(3) is bonded to one O(1), one O(11), one O(2), one O(5), and one O(6) atom to form GeO5 trigonal bipyramids that share corners with two equivalent Cu(1)O6 octahedra, corners with two equivalent Ge(4)O5 trigonal bipyramids,  an edgeedge with one Cu(2)O6 octahedra, and  an edgeedge with one Ge(4)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 42°. In the fourth Ge site, Ge(4) is bonded to one O(1), one O(12), one O(2), one O(5), and one O(6) atom to form GeO5 trigonal bipyramids that share corners with two equivalent Cu(2)O6 octahedra, corners with two equivalent Ge(3)O5 trigonal bipyramids,  an edgeedge with one Cu(1)O6 octahedra, and  an edgeedge with one Ge(3)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 44-47°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Ca(1), one Ge(3), and one Ge(4) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Ca(1), one Ge(3), and one Ge(4) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Ca(1), one Ge(1), and one Ge(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ge(1) and one Ge(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Cu(2), one Ge(3), and one Ge(4) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Cu(1), one Ge(3), and one Ge(4) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Cu(2) and one Ge(2) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Ca(1), one Cu(1), and one Ge(1) atom. In the ninth O site, O(9) is bonded in a distorted trigonal non-coplanar geometry to one Cu(1), one Cu(2), and one Ge(1) atom. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Cu(1), one Cu(2), and one Ge(2) atom. In the eleventh O site, O(11) is bonded in a trigonal non-coplanar geometry to one Cu(1), one Cu(2), and one Ge(3) atom. In the twelfth O site, O(12) is bonded in a distorted tetrahedral geometry to one Ca(1), one Cu(1), one Cu(2), and one Ge(4) atom. is represented by the CIF card [CIF]
data_CaCu2(GeO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.150
_cell_length_b   5.290
_cell_length_c   10.211
_cell_angle_alpha   75.353
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   478.194
_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
  Ca  Ca0  1  0.551  0.766  0.289  1.0
  Ca  Ca1  1  0.051  0.234  0.711  1.0
  Cu  Cu2  1  0.340  0.260  0.230  1.0
  Cu  Cu3  1  0.840  0.740  0.770  1.0
  Cu  Cu4  1  0.651  0.252  0.767  1.0
  Cu  Cu5  1  0.151  0.748  0.233  1.0
  Ge  Ge6  1  0.653  0.390  0.053  1.0
  Ge  Ge7  1  0.153  0.610  0.947  1.0
  Ge  Ge8  1  0.353  0.112  0.946  1.0
  Ge  Ge9  1  0.853  0.888  0.054  1.0
  Ge  Ge10  1  0.647  0.166  0.491  1.0
  Ge  Ge11  1  0.147  0.834  0.509  1.0
  Ge  Ge12  1  0.348  0.332  0.514  1.0
  Ge  Ge13  1  0.848  0.668  0.486  1.0
  O  O14  1  0.734  0.932  0.408  1.0
  O  O15  1  0.234  0.068  0.592  1.0
  O  O16  1  0.248  0.551  0.598  1.0
  O  O17  1  0.748  0.449  0.402  1.0
  O  O18  1  0.697  0.049  0.107  1.0
  O  O19  1  0.197  0.951  0.893  1.0
  O  O20  1  0.301  0.442  0.895  1.0
  O  O21  1  0.801  0.558  0.105  1.0
  O  O22  1  0.026  0.600  0.432  1.0
  O  O23  1  0.526  0.400  0.568  1.0
  O  O24  1  0.972  0.902  0.581  1.0
  O  O25  1  0.472  0.098  0.419  1.0
  O  O26  1  0.006  0.966  0.139  1.0
  O  O27  1  0.506  0.034  0.861  1.0
  O  O28  1  0.003  0.531  0.855  1.0
  O  O29  1  0.503  0.469  0.145  1.0
  O  O30  1  0.645  0.488  0.873  1.0
  O  O31  1  0.145  0.512  0.127  1.0
  O  O32  1  0.369  0.014  0.128  1.0
  O  O33  1  0.869  0.986  0.872  1.0
  O  O34  1  0.692  0.999  0.669  1.0
  O  O35  1  0.192  0.001  0.331  1.0
  O  O36  1  0.312  0.515  0.332  1.0
  O  O37  1  0.812  0.485  0.668  1.0
[/CIF]
.