The crystal structure described by CoGeO3 crystallizes in the monoclinic C2/c 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(3) 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 three equivalent Co(2)O6 octahedra. In the second Co site, Co(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CoO6 octahedra that share corners with eight equivalent Ge(1)O4 tetrahedra and edges with three equivalent Co(1)O6 octahedra. Ge(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form GeO4 tetrahedra that share corners with three equivalent Co(1)O6 octahedra, corners with four equivalent Co(2)O6 octahedra, and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-60°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Co(2) and two equivalent Ge(1) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one Ge(1) atom. In the third O site, O(3) is bonded to one Co(2), two equivalent Co(1), and one Ge(1) atom to form a mixture of distorted edge and corner-sharing OCo3Ge trigonal pyramids. is represented by the CIF card [CIF]
data_CoGeO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.154
_cell_length_b   6.595
_cell_length_c   6.594
_cell_angle_alpha   86.087
_cell_angle_beta   82.024
_cell_angle_gamma   82.011
_symmetry_Int_Tables_number   1
_cell_volume   219.539
_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
  Co  Co0  1  0.250  0.092  0.908  1.0
  Co  Co1  1  0.750  0.267  0.733  1.0
  Co  Co2  1  0.750  0.908  0.092  1.0
  Co  Co3  1  0.250  0.733  0.267  1.0
  Ge  Ge4  1  0.712  0.793  0.604  1.0
  Ge  Ge5  1  0.212  0.604  0.793  1.0
  Ge  Ge6  1  0.788  0.396  0.207  1.0
  Ge  Ge7  1  0.288  0.207  0.396  1.0
  O  O8  1  0.405  0.707  0.569  1.0
  O  O9  1  0.095  0.431  0.293  1.0
  O  O10  1  0.884  0.863  0.371  1.0
  O  O11  1  0.634  0.973  0.793  1.0
  O  O12  1  0.135  0.793  0.973  1.0
  O  O13  1  0.595  0.293  0.431  1.0
  O  O14  1  0.905  0.569  0.707  1.0
  O  O15  1  0.616  0.629  0.137  1.0
  O  O16  1  0.384  0.371  0.863  1.0
  O  O17  1  0.366  0.027  0.207  1.0
  O  O18  1  0.865  0.207  0.027  1.0
  O  O19  1  0.116  0.137  0.629  1.0
[/CIF]
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The crystal structure described by CoGeO3 crystallizes in the monoclinic C2/c 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(3) 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 three equivalent Co(2)O6 octahedra. In the second Co site, Co(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CoO6 octahedra that share corners with eight equivalent Ge(1)O4 tetrahedra and edges with three equivalent Co(1)O6 octahedra. Ge(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form GeO4 tetrahedra that share corners with three equivalent Co(1)O6 octahedra, corners with four equivalent Co(2)O6 octahedra, and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 52-60°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Co(2) and two equivalent Ge(1) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(2), and one Ge(1) atom. In the third O site, O(3) is bonded to one Co(2), two equivalent Co(1), and one Ge(1) atom to form a mixture of distorted edge and corner-sharing OCo3Ge trigonal pyramids. is represented by the CIF card [CIF]
data_CoGeO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.154
_cell_length_b   6.595
_cell_length_c   6.594
_cell_angle_alpha   86.087
_cell_angle_beta   82.024
_cell_angle_gamma   82.011
_symmetry_Int_Tables_number   1
_cell_volume   219.539
_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
  Co  Co0  1  0.250  0.092  0.908  1.0
  Co  Co1  1  0.750  0.267  0.733  1.0
  Co  Co2  1  0.750  0.908  0.092  1.0
  Co  Co3  1  0.250  0.733  0.267  1.0
  Ge  Ge4  1  0.712  0.793  0.604  1.0
  Ge  Ge5  1  0.212  0.604  0.793  1.0
  Ge  Ge6  1  0.788  0.396  0.207  1.0
  Ge  Ge7  1  0.288  0.207  0.396  1.0
  O  O8  1  0.405  0.707  0.569  1.0
  O  O9  1  0.095  0.431  0.293  1.0
  O  O10  1  0.884  0.863  0.371  1.0
  O  O11  1  0.634  0.973  0.793  1.0
  O  O12  1  0.135  0.793  0.973  1.0
  O  O13  1  0.595  0.293  0.431  1.0
  O  O14  1  0.905  0.569  0.707  1.0
  O  O15  1  0.616  0.629  0.137  1.0
  O  O16  1  0.384  0.371  0.863  1.0
  O  O17  1  0.366  0.027  0.207  1.0
  O  O18  1  0.865  0.207  0.027  1.0
  O  O19  1  0.116  0.137  0.629  1.0
[/CIF]
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