The crystal structure described by Cr5Cu(GeO6)2 is beta indium sulfide-derived structured and crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CrO6 octahedra that share corners with two equivalent Cu(1)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with two equivalent Cr(2)O6 octahedra. In the second Cr site, Cr(2) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(5) atoms to form CrO6 octahedra that share corners with three equivalent Cu(1)O4 tetrahedra, corners with three equivalent Ge(1)O4 tetrahedra,  an edgeedge with one Cr(2)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with two equivalent Cr(3)O6 octahedra. In the third Cr site, Cr(3) is bonded to two equivalent O(5) and four equivalent O(4) atoms to form CrO6 octahedra that share corners with two equivalent Cu(1)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra, edges with two equivalent Cr(3)O6 octahedra, and edges with four equivalent Cr(2)O6 octahedra. Cu(1) is bonded to two equivalent O(2) and two equivalent O(5) atoms to form CuO4 tetrahedra that share corners with two equivalent Cr(3)O6 octahedra, corners with four equivalent Cr(1)O6 octahedra, and corners with six equivalent Cr(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 59-62°. Ge(1) is bonded to one O(3), one O(4), and two equivalent O(1) atoms to form GeO4 tetrahedra that share corners with two equivalent Cr(3)O6 octahedra, corners with three equivalent Cr(2)O6 octahedra, and corners with four equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-57°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one Ge(1) atom. In the second O site, O(2) is bonded to one Cr(2), two equivalent Cr(1), and one Cu(1) atom to form distorted corner-sharing OCr3Cu tetrahedra. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Cr(1) and one Ge(1) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Cr(2), two equivalent Cr(3), and one Ge(1) atom. In the fifth O site, O(5) is bonded to one Cr(3), two equivalent Cr(2), and one Cu(1) atom to form a mixture of distorted corner and edge-sharing OCr3Cu tetrahedra. is represented by the CIF card [CIF]
data_Cr5Cu(GeO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.612
_cell_length_b   9.612
_cell_length_c   6.050
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   127.794
_symmetry_Int_Tables_number   1
_cell_volume   441.708
_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
  Cr  Cr0  1  0.672  0.328  0.500  1.0
  Cr  Cr1  1  0.328  0.672  0.500  1.0
  Cr  Cr2  1  0.328  0.672  0.000  1.0
  Cr  Cr3  1  0.672  0.328  0.000  1.0
  Cr  Cr4  1  0.161  0.335  0.750  1.0
  Cr  Cr5  1  0.839  0.665  0.250  1.0
  Cr  Cr6  1  0.335  0.161  0.750  1.0
  Cr  Cr7  1  0.665  0.839  0.250  1.0
  Cr  Cr8  1  0.000  0.000  0.500  1.0
  Cr  Cr9  1  0.000  0.000  0.000  1.0
  Cu  Cu10  1  0.623  0.623  0.750  1.0
  Cu  Cu11  1  0.377  0.377  0.250  1.0
  Ge  Ge12  1  0.024  0.689  0.750  1.0
  Ge  Ge13  1  0.976  0.311  0.250  1.0
  Ge  Ge14  1  0.689  0.024  0.750  1.0
  Ge  Ge15  1  0.311  0.976  0.250  1.0
  O  O16  1  0.905  0.578  0.508  1.0
  O  O17  1  0.095  0.422  0.492  1.0
  O  O18  1  0.095  0.422  0.008  1.0
  O  O19  1  0.578  0.905  0.992  1.0
  O  O20  1  0.905  0.578  0.992  1.0
  O  O21  1  0.422  0.095  0.008  1.0
  O  O22  1  0.422  0.095  0.492  1.0
  O  O23  1  0.578  0.905  0.508  1.0
  O  O24  1  0.383  0.576  0.750  1.0
  O  O25  1  0.617  0.424  0.250  1.0
  O  O26  1  0.576  0.383  0.750  1.0
  O  O27  1  0.424  0.617  0.250  1.0
  O  O28  1  0.233  0.736  0.750  1.0
  O  O29  1  0.767  0.264  0.250  1.0
  O  O30  1  0.736  0.233  0.750  1.0
  O  O31  1  0.264  0.767  0.250  1.0
  O  O32  1  0.914  0.078  0.750  1.0
  O  O33  1  0.086  0.922  0.250  1.0
  O  O34  1  0.078  0.914  0.750  1.0
  O  O35  1  0.922  0.086  0.250  1.0
  O  O36  1  0.232  0.232  0.531  1.0
  O  O37  1  0.768  0.768  0.469  1.0
  O  O38  1  0.768  0.768  0.031  1.0
  O  O39  1  0.232  0.232  0.969  1.0
[/CIF]
.
The crystal structure described by Cr5Cu(GeO6)2 is beta indium sulfide-derived structured and crystallizes in the orthorhombic Cmcm space group. There are three inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CrO6 octahedra that share corners with two equivalent Cu(1)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with two equivalent Cr(2)O6 octahedra. In the second Cr site, Cr(2) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(5) atoms to form CrO6 octahedra that share corners with three equivalent Cu(1)O4 tetrahedra, corners with three equivalent Ge(1)O4 tetrahedra,  an edgeedge with one Cr(2)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with two equivalent Cr(3)O6 octahedra. In the third Cr site, Cr(3) is bonded to two equivalent O(5) and four equivalent O(4) atoms to form CrO6 octahedra that share corners with two equivalent Cu(1)O4 tetrahedra, corners with four equivalent Ge(1)O4 tetrahedra, edges with two equivalent Cr(3)O6 octahedra, and edges with four equivalent Cr(2)O6 octahedra. Cu(1) is bonded to two equivalent O(2) and two equivalent O(5) atoms to form CuO4 tetrahedra that share corners with two equivalent Cr(3)O6 octahedra, corners with four equivalent Cr(1)O6 octahedra, and corners with six equivalent Cr(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 59-62°. Ge(1) is bonded to one O(3), one O(4), and two equivalent O(1) atoms to form GeO4 tetrahedra that share corners with two equivalent Cr(3)O6 octahedra, corners with three equivalent Cr(2)O6 octahedra, and corners with four equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-57°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Cr(1), one Cr(2), and one Ge(1) atom. In the second O site, O(2) is bonded to one Cr(2), two equivalent Cr(1), and one Cu(1) atom to form distorted corner-sharing OCr3Cu tetrahedra. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Cr(1) and one Ge(1) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Cr(2), two equivalent Cr(3), and one Ge(1) atom. In the fifth O site, O(5) is bonded to one Cr(3), two equivalent Cr(2), and one Cu(1) atom to form a mixture of distorted corner and edge-sharing OCr3Cu tetrahedra. is represented by the CIF card [CIF]
data_Cr5Cu(GeO6)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.612
_cell_length_b   9.612
_cell_length_c   6.050
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   127.794
_symmetry_Int_Tables_number   1
_cell_volume   441.708
_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
  Cr  Cr0  1  0.672  0.328  0.500  1.0
  Cr  Cr1  1  0.328  0.672  0.500  1.0
  Cr  Cr2  1  0.328  0.672  0.000  1.0
  Cr  Cr3  1  0.672  0.328  0.000  1.0
  Cr  Cr4  1  0.161  0.335  0.750  1.0
  Cr  Cr5  1  0.839  0.665  0.250  1.0
  Cr  Cr6  1  0.335  0.161  0.750  1.0
  Cr  Cr7  1  0.665  0.839  0.250  1.0
  Cr  Cr8  1  0.000  0.000  0.500  1.0
  Cr  Cr9  1  0.000  0.000  0.000  1.0
  Cu  Cu10  1  0.623  0.623  0.750  1.0
  Cu  Cu11  1  0.377  0.377  0.250  1.0
  Ge  Ge12  1  0.024  0.689  0.750  1.0
  Ge  Ge13  1  0.976  0.311  0.250  1.0
  Ge  Ge14  1  0.689  0.024  0.750  1.0
  Ge  Ge15  1  0.311  0.976  0.250  1.0
  O  O16  1  0.905  0.578  0.508  1.0
  O  O17  1  0.095  0.422  0.492  1.0
  O  O18  1  0.095  0.422  0.008  1.0
  O  O19  1  0.578  0.905  0.992  1.0
  O  O20  1  0.905  0.578  0.992  1.0
  O  O21  1  0.422  0.095  0.008  1.0
  O  O22  1  0.422  0.095  0.492  1.0
  O  O23  1  0.578  0.905  0.508  1.0
  O  O24  1  0.383  0.576  0.750  1.0
  O  O25  1  0.617  0.424  0.250  1.0
  O  O26  1  0.576  0.383  0.750  1.0
  O  O27  1  0.424  0.617  0.250  1.0
  O  O28  1  0.233  0.736  0.750  1.0
  O  O29  1  0.767  0.264  0.250  1.0
  O  O30  1  0.736  0.233  0.750  1.0
  O  O31  1  0.264  0.767  0.250  1.0
  O  O32  1  0.914  0.078  0.750  1.0
  O  O33  1  0.086  0.922  0.250  1.0
  O  O34  1  0.078  0.914  0.750  1.0
  O  O35  1  0.922  0.086  0.250  1.0
  O  O36  1  0.232  0.232  0.531  1.0
  O  O37  1  0.768  0.768  0.469  1.0
  O  O38  1  0.768  0.768  0.031  1.0
  O  O39  1  0.232  0.232  0.969  1.0
[/CIF]
.