The crystal structure described by CaGeO3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(2) and six equivalent O(1) atoms. Ge(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form corner-sharing GeO6 octahedra. The corner-sharing octahedral tilt angles range from 24-25°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to three equivalent Ca(1) and two equivalent Ge(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Ca(1) and two equivalent Ge(1) atoms. is represented by the CIF file [CIF]
data_CaGeO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.332
_cell_length_b   5.374
_cell_length_c   7.553
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   216.427
_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
  Ca  Ca0  1  0.992  0.040  0.250  1.0
  Ca  Ca1  1  0.492  0.460  0.750  1.0
  Ca  Ca2  1  0.508  0.540  0.250  1.0
  Ca  Ca3  1  0.008  0.960  0.750  1.0
  Ge  Ge4  1  0.000  0.500  0.000  1.0
  Ge  Ge5  1  0.500  0.000  0.000  1.0
  Ge  Ge6  1  0.500  0.000  0.500  1.0
  Ge  Ge7  1  0.000  0.500  0.500  1.0
  O  O8  1  0.710  0.288  0.462  1.0
  O  O9  1  0.210  0.212  0.538  1.0
  O  O10  1  0.790  0.788  0.038  1.0
  O  O11  1  0.290  0.712  0.962  1.0
  O  O12  1  0.290  0.712  0.538  1.0
  O  O13  1  0.790  0.788  0.462  1.0
  O  O14  1  0.210  0.212  0.962  1.0
  O  O15  1  0.710  0.288  0.038  1.0
  O  O16  1  0.074  0.484  0.250  1.0
  O  O17  1  0.574  0.016  0.750  1.0
  O  O18  1  0.426  0.984  0.250  1.0
  O  O19  1  0.926  0.516  0.750  1.0
[/CIF]
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The crystal structure described by CaGeO3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(2) and six equivalent O(1) atoms. Ge(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form corner-sharing GeO6 octahedra. The corner-sharing octahedral tilt angles range from 24-25°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to three equivalent Ca(1) and two equivalent Ge(1) atoms. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Ca(1) and two equivalent Ge(1) atoms. is represented by the CIF file [CIF]
data_CaGeO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.332
_cell_length_b   5.374
_cell_length_c   7.553
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   216.427
_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
  Ca  Ca0  1  0.992  0.040  0.250  1.0
  Ca  Ca1  1  0.492  0.460  0.750  1.0
  Ca  Ca2  1  0.508  0.540  0.250  1.0
  Ca  Ca3  1  0.008  0.960  0.750  1.0
  Ge  Ge4  1  0.000  0.500  0.000  1.0
  Ge  Ge5  1  0.500  0.000  0.000  1.0
  Ge  Ge6  1  0.500  0.000  0.500  1.0
  Ge  Ge7  1  0.000  0.500  0.500  1.0
  O  O8  1  0.710  0.288  0.462  1.0
  O  O9  1  0.210  0.212  0.538  1.0
  O  O10  1  0.790  0.788  0.038  1.0
  O  O11  1  0.290  0.712  0.962  1.0
  O  O12  1  0.290  0.712  0.538  1.0
  O  O13  1  0.790  0.788  0.462  1.0
  O  O14  1  0.210  0.212  0.962  1.0
  O  O15  1  0.710  0.288  0.038  1.0
  O  O16  1  0.074  0.484  0.250  1.0
  O  O17  1  0.574  0.016  0.750  1.0
  O  O18  1  0.426  0.984  0.250  1.0
  O  O19  1  0.926  0.516  0.750  1.0
[/CIF]
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