The material structure described by Y2O3 is Corundum-like structured and crystallizes in the orthorhombic Pbca space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(1), two equivalent O(3), and three equivalent O(2) atoms to form a mixture of distorted corner, edge, and face-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 47-65°. In the second Y site, Y(2) is bonded to one O(2), two equivalent O(3), and three equivalent O(1) atoms to form a mixture of distorted corner, edge, and face-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 47-72°. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Y(1) and three equivalent Y(2) atoms to form a mixture of distorted corner and edge-sharing OY4 tetrahedra. In the second O site, O(2) is bonded to one Y(2) and three equivalent Y(1) atoms to form a mixture of distorted corner and edge-sharing OY4 trigonal pyramids. In the third O site, O(3) is bonded to two equivalent Y(1) and two equivalent Y(2) atoms to form a mixture of distorted corner and edge-sharing OY4 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.772
_cell_length_b   5.946
_cell_length_c   16.659
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   571.722
_cell_formula_units_Z   8
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
  Y  Y0  1  0.002  0.208  0.070  1.0
  Y  Y1  1  0.995  0.762  0.182  1.0
  Y  Y2  1  0.002  0.292  0.570  1.0
  Y  Y3  1  0.995  0.738  0.682  1.0
  Y  Y4  1  0.505  0.262  0.182  1.0
  Y  Y5  1  0.505  0.238  0.682  1.0
  Y  Y6  1  0.498  0.708  0.070  1.0
  Y  Y7  1  0.498  0.792  0.570  1.0
  Y  Y8  1  0.502  0.208  0.430  1.0
  Y  Y9  1  0.502  0.292  0.930  1.0
  Y  Y10  1  0.495  0.762  0.318  1.0
  Y  Y11  1  0.495  0.738  0.818  1.0
  Y  Y12  1  0.998  0.708  0.430  1.0
  Y  Y13  1  0.005  0.262  0.318  1.0
  Y  Y14  1  0.005  0.238  0.818  1.0
  Y  Y15  1  0.998  0.792  0.930  1.0
  O  O16  1  0.145  0.125  0.201  1.0
  O  O17  1  0.145  0.375  0.701  1.0
  O  O18  1  0.142  0.843  0.053  1.0
  O  O19  1  0.142  0.657  0.553  1.0
  O  O20  1  0.207  0.982  0.375  1.0
  O  O21  1  0.207  0.518  0.875  1.0
  O  O22  1  0.293  0.482  0.375  1.0
  O  O23  1  0.293  0.018  0.875  1.0
  O  O24  1  0.358  0.157  0.553  1.0
  O  O25  1  0.358  0.343  0.053  1.0
  O  O26  1  0.355  0.625  0.201  1.0
  O  O27  1  0.355  0.875  0.701  1.0
  O  O28  1  0.645  0.375  0.799  1.0
  O  O29  1  0.645  0.125  0.299  1.0
  O  O30  1  0.642  0.843  0.447  1.0
  O  O31  1  0.642  0.657  0.947  1.0
  O  O32  1  0.707  0.982  0.125  1.0
  O  O33  1  0.707  0.518  0.625  1.0
  O  O34  1  0.793  0.482  0.125  1.0
  O  O35  1  0.793  0.018  0.625  1.0
  O  O36  1  0.858  0.343  0.447  1.0
  O  O37  1  0.858  0.157  0.947  1.0
  O  O38  1  0.855  0.875  0.799  1.0
  O  O39  1  0.855  0.625  0.299  1.0
[/CIF]
.
The material structure described by Y2O3 is Corundum-like structured and crystallizes in the orthorhombic Pbca space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(1), two equivalent O(3), and three equivalent O(2) atoms to form a mixture of distorted corner, edge, and face-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 47-65°. In the second Y site, Y(2) is bonded to one O(2), two equivalent O(3), and three equivalent O(1) atoms to form a mixture of distorted corner, edge, and face-sharing YO6 octahedra. The corner-sharing octahedral tilt angles range from 47-72°. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Y(1) and three equivalent Y(2) atoms to form a mixture of distorted corner and edge-sharing OY4 tetrahedra. In the second O site, O(2) is bonded to one Y(2) and three equivalent Y(1) atoms to form a mixture of distorted corner and edge-sharing OY4 trigonal pyramids. In the third O site, O(3) is bonded to two equivalent Y(1) and two equivalent Y(2) atoms to form a mixture of distorted corner and edge-sharing OY4 trigonal pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.772
_cell_length_b   5.946
_cell_length_c   16.659
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   571.722
_cell_formula_units_Z   8
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
  Y  Y0  1  0.002  0.208  0.070  1.0
  Y  Y1  1  0.995  0.762  0.182  1.0
  Y  Y2  1  0.002  0.292  0.570  1.0
  Y  Y3  1  0.995  0.738  0.682  1.0
  Y  Y4  1  0.505  0.262  0.182  1.0
  Y  Y5  1  0.505  0.238  0.682  1.0
  Y  Y6  1  0.498  0.708  0.070  1.0
  Y  Y7  1  0.498  0.792  0.570  1.0
  Y  Y8  1  0.502  0.208  0.430  1.0
  Y  Y9  1  0.502  0.292  0.930  1.0
  Y  Y10  1  0.495  0.762  0.318  1.0
  Y  Y11  1  0.495  0.738  0.818  1.0
  Y  Y12  1  0.998  0.708  0.430  1.0
  Y  Y13  1  0.005  0.262  0.318  1.0
  Y  Y14  1  0.005  0.238  0.818  1.0
  Y  Y15  1  0.998  0.792  0.930  1.0
  O  O16  1  0.145  0.125  0.201  1.0
  O  O17  1  0.145  0.375  0.701  1.0
  O  O18  1  0.142  0.843  0.053  1.0
  O  O19  1  0.142  0.657  0.553  1.0
  O  O20  1  0.207  0.982  0.375  1.0
  O  O21  1  0.207  0.518  0.875  1.0
  O  O22  1  0.293  0.482  0.375  1.0
  O  O23  1  0.293  0.018  0.875  1.0
  O  O24  1  0.358  0.157  0.553  1.0
  O  O25  1  0.358  0.343  0.053  1.0
  O  O26  1  0.355  0.625  0.201  1.0
  O  O27  1  0.355  0.875  0.701  1.0
  O  O28  1  0.645  0.375  0.799  1.0
  O  O29  1  0.645  0.125  0.299  1.0
  O  O30  1  0.642  0.843  0.447  1.0
  O  O31  1  0.642  0.657  0.947  1.0
  O  O32  1  0.707  0.982  0.125  1.0
  O  O33  1  0.707  0.518  0.625  1.0
  O  O34  1  0.793  0.482  0.125  1.0
  O  O35  1  0.793  0.018  0.625  1.0
  O  O36  1  0.858  0.343  0.447  1.0
  O  O37  1  0.858  0.157  0.947  1.0
  O  O38  1  0.855  0.875  0.799  1.0
  O  O39  1  0.855  0.625  0.299  1.0
[/CIF]
.