The crystal structure described by Co2GeO4 is Spinel structured and crystallizes in the orthorhombic Imma space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CoO6 octahedra that share corners with six equivalent Ge(1)O4 tetrahedra, edges with two equivalent Co(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. In the second Co site, Co(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CoO6 octahedra that share corners with six equivalent Ge(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and edges with four equivalent Co(1)O6 octahedra. Ge(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form GeO4 tetrahedra that share corners with six equivalent Co(1)O6 octahedra and corners with six equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Co(2), two equivalent Co(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Co(1), two equivalent Co(2), and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Co2GeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.885
_cell_length_b   5.885
_cell_length_c   5.885
_cell_angle_alpha   119.147
_cell_angle_beta   118.932
_cell_angle_gamma   91.672
_symmetry_Int_Tables_number   1
_cell_volume   146.174
_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
  Co  Co0  1  0.000  0.000  0.000  1.0
  Co  Co1  1  0.500  0.000  0.500  1.0
  Co  Co2  1  0.500  0.500  0.500  1.0
  Co  Co3  1  0.500  0.000  0.000  1.0
  Ge  Ge4  1  0.130  0.380  0.750  1.0
  Ge  Ge5  1  0.870  0.620  0.250  1.0
  O  O6  1  0.745  0.244  0.999  1.0
  O  O7  1  0.250  0.254  0.997  1.0
  O  O8  1  0.255  0.255  0.499  1.0
  O  O9  1  0.750  0.746  0.003  1.0
  O  O10  1  0.757  0.254  0.503  1.0
  O  O11  1  0.243  0.746  0.497  1.0
  O  O12  1  0.745  0.745  0.501  1.0
  O  O13  1  0.255  0.756  0.001  1.0
[/CIF]
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The crystal structure described by Co2GeO4 is Spinel structured and crystallizes in the orthorhombic Imma space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CoO6 octahedra that share corners with six equivalent Ge(1)O4 tetrahedra, edges with two equivalent Co(1)O6 octahedra, and edges with four equivalent Co(2)O6 octahedra. In the second Co site, Co(2) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CoO6 octahedra that share corners with six equivalent Ge(1)O4 tetrahedra, edges with two equivalent Co(2)O6 octahedra, and edges with four equivalent Co(1)O6 octahedra. Ge(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form GeO4 tetrahedra that share corners with six equivalent Co(1)O6 octahedra and corners with six equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 54-56°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Co(2), two equivalent Co(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Co(1), two equivalent Co(2), and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Co2GeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.885
_cell_length_b   5.885
_cell_length_c   5.885
_cell_angle_alpha   119.147
_cell_angle_beta   118.932
_cell_angle_gamma   91.672
_symmetry_Int_Tables_number   1
_cell_volume   146.174
_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
  Co  Co0  1  0.000  0.000  0.000  1.0
  Co  Co1  1  0.500  0.000  0.500  1.0
  Co  Co2  1  0.500  0.500  0.500  1.0
  Co  Co3  1  0.500  0.000  0.000  1.0
  Ge  Ge4  1  0.130  0.380  0.750  1.0
  Ge  Ge5  1  0.870  0.620  0.250  1.0
  O  O6  1  0.745  0.244  0.999  1.0
  O  O7  1  0.250  0.254  0.997  1.0
  O  O8  1  0.255  0.255  0.499  1.0
  O  O9  1  0.750  0.746  0.003  1.0
  O  O10  1  0.757  0.254  0.503  1.0
  O  O11  1  0.243  0.746  0.497  1.0
  O  O12  1  0.745  0.745  0.501  1.0
  O  O13  1  0.255  0.756  0.001  1.0
[/CIF]
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