The material structure described by Cr(GeO3)2 crystallizes in the monoclinic C2/c space group. Cr(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form CrO6 octahedra that share corners with six equivalent Ge(1)O4 tetrahedra and edges with two equivalent Cr(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 Cr(1)O6 octahedra and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 41-60°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Ge(1) atoms. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Cr(1) and one Ge(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Cr(1) and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cr(GeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.607
_cell_length_b   6.607
_cell_length_c   5.522
_cell_angle_alpha   77.006
_cell_angle_beta   77.006
_cell_angle_gamma   83.202
_symmetry_Int_Tables_number   1
_cell_volume   228.252
_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  0.096  0.904  0.750  1.0
  Cr  Cr1  1  0.904  0.096  0.250  1.0
  Ge  Ge2  1  0.204  0.385  0.773  1.0
  Ge  Ge3  1  0.615  0.796  0.727  1.0
  Ge  Ge4  1  0.796  0.615  0.227  1.0
  Ge  Ge5  1  0.385  0.204  0.273  1.0
  O  O6  1  0.392  0.339  0.509  1.0
  O  O7  1  0.661  0.608  0.991  1.0
  O  O8  1  0.608  0.661  0.491  1.0
  O  O9  1  0.339  0.392  0.009  1.0
  O  O10  1  0.639  0.084  0.198  1.0
  O  O11  1  0.916  0.361  0.302  1.0
  O  O12  1  0.361  0.916  0.802  1.0
  O  O13  1  0.084  0.639  0.698  1.0
  O  O14  1  0.029  0.182  0.878  1.0
  O  O15  1  0.818  0.971  0.622  1.0
  O  O16  1  0.971  0.818  0.122  1.0
  O  O17  1  0.182  0.029  0.378  1.0
[/CIF]
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The material structure described by Cr(GeO3)2 crystallizes in the monoclinic C2/c space group. Cr(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form CrO6 octahedra that share corners with six equivalent Ge(1)O4 tetrahedra and edges with two equivalent Cr(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 Cr(1)O6 octahedra and corners with two equivalent Ge(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 41-60°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Ge(1) atoms. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Cr(1) and one Ge(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Cr(1) and one Ge(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Cr(GeO3)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.607
_cell_length_b   6.607
_cell_length_c   5.522
_cell_angle_alpha   77.006
_cell_angle_beta   77.006
_cell_angle_gamma   83.202
_symmetry_Int_Tables_number   1
_cell_volume   228.252
_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  0.096  0.904  0.750  1.0
  Cr  Cr1  1  0.904  0.096  0.250  1.0
  Ge  Ge2  1  0.204  0.385  0.773  1.0
  Ge  Ge3  1  0.615  0.796  0.727  1.0
  Ge  Ge4  1  0.796  0.615  0.227  1.0
  Ge  Ge5  1  0.385  0.204  0.273  1.0
  O  O6  1  0.392  0.339  0.509  1.0
  O  O7  1  0.661  0.608  0.991  1.0
  O  O8  1  0.608  0.661  0.491  1.0
  O  O9  1  0.339  0.392  0.009  1.0
  O  O10  1  0.639  0.084  0.198  1.0
  O  O11  1  0.916  0.361  0.302  1.0
  O  O12  1  0.361  0.916  0.802  1.0
  O  O13  1  0.084  0.639  0.698  1.0
  O  O14  1  0.029  0.182  0.878  1.0
  O  O15  1  0.818  0.971  0.622  1.0
  O  O16  1  0.971  0.818  0.122  1.0
  O  O17  1  0.182  0.029  0.378  1.0
[/CIF]
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