The crystal structure described by Dy2O3 crystallizes in the monoclinic C2/m space group. There are three inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 7-coordinate geometry to two equivalent O(1), two equivalent O(4), and three equivalent O(2) atoms. In the second Dy site, Dy(2) is bonded in a 7-coordinate geometry to one O(2), one O(3), two equivalent O(1), and three equivalent O(5) atoms. In the third Dy site, Dy(3) is bonded to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms to form a mixture of distorted edge and corner-sharing DyO6 octahedra. The corner-sharing octahedra are not tilted. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Dy(3), two equivalent Dy(1), and two equivalent Dy(2) atoms to form distorted ODy5 square pyramids that share corners with two equivalent O(4)Dy4 tetrahedra, corners with five equivalent O(5)Dy4 tetrahedra, edges with two equivalent O(3)Dy6 octahedra, edges with two equivalent O(1)Dy5 square pyramids,  an edgeedge with one O(5)Dy4 tetrahedra, and edges with two equivalent O(4)Dy4 tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Dy(2) and three equivalent Dy(1) atoms. In the third O site, O(3) is bonded to two equivalent Dy(2) and four equivalent Dy(3) atoms to form ODy6 octahedra that share corners with two equivalent O(5)Dy4 tetrahedra, corners with four equivalent O(4)Dy4 tetrahedra, edges with two equivalent O(3)Dy6 octahedra, edges with four equivalent O(1)Dy5 square pyramids, edges with two equivalent O(4)Dy4 tetrahedra, and edges with four equivalent O(5)Dy4 tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Dy(1) and two equivalent Dy(3) atoms to form ODy4 tetrahedra that share corners with two equivalent O(3)Dy6 octahedra, corners with two equivalent O(1)Dy5 square pyramids, corners with two equivalent O(4)Dy4 tetrahedra, corners with two equivalent O(5)Dy4 tetrahedra,  an edgeedge with one O(3)Dy6 octahedra, edges with two equivalent O(1)Dy5 square pyramids, and  an edgeedge with one O(4)Dy4 tetrahedra. The corner-sharing octahedral tilt angles are 14°. In the fifth O site, O(5) is bonded to one Dy(3) and three equivalent Dy(2) atoms to form ODy4 tetrahedra that share  a cornercorner with one O(3)Dy6 octahedra, corners with five equivalent O(1)Dy5 square pyramids, corners with two equivalent O(4)Dy4 tetrahedra, corners with two equivalent O(5)Dy4 tetrahedra, edges with two equivalent O(3)Dy6 octahedra,  an edgeedge with one O(1)Dy5 square pyramid, and edges with two equivalent O(5)Dy4 tetrahedra. The corner-sharing octahedral tilt angles are 50°. is represented by the CIF file [CIF]
data_Dy2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.484
_cell_length_b   7.173
_cell_length_c   8.596
_cell_angle_alpha   99.803
_cell_angle_beta   89.999
_cell_angle_gamma   104.055
_symmetry_Int_Tables_number   1
_cell_volume   205.169
_cell_formula_units_Z   3
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
  Dy  Dy0  1  0.635  0.270  0.487  1.0
  Dy  Dy1  1  0.691  0.382  0.138  1.0
  Dy  Dy2  1  0.033  0.066  0.813  1.0
  Dy  Dy3  1  0.365  0.730  0.513  1.0
  Dy  Dy4  1  0.309  0.618  0.862  1.0
  Dy  Dy5  1  0.967  0.934  0.187  1.0
  O  O6  1  0.872  0.744  0.718  1.0
  O  O7  1  0.795  0.589  0.376  1.0
  O  O8  1  0.128  0.256  0.282  1.0
  O  O9  1  0.205  0.411  0.624  1.0
  O  O10  1  0.500  0.000  0.000  1.0
  O  O11  1  0.471  0.943  0.344  1.0
  O  O12  1  0.529  0.057  0.656  1.0
  O  O13  1  0.175  0.350  0.970  1.0
  O  O14  1  0.825  0.650  0.030  1.0
[/CIF]
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The crystal structure described by Dy2O3 crystallizes in the monoclinic C2/m space group. There are three inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 7-coordinate geometry to two equivalent O(1), two equivalent O(4), and three equivalent O(2) atoms. In the second Dy site, Dy(2) is bonded in a 7-coordinate geometry to one O(2), one O(3), two equivalent O(1), and three equivalent O(5) atoms. In the third Dy site, Dy(3) is bonded to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms to form a mixture of distorted edge and corner-sharing DyO6 octahedra. The corner-sharing octahedra are not tilted. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Dy(3), two equivalent Dy(1), and two equivalent Dy(2) atoms to form distorted ODy5 square pyramids that share corners with two equivalent O(4)Dy4 tetrahedra, corners with five equivalent O(5)Dy4 tetrahedra, edges with two equivalent O(3)Dy6 octahedra, edges with two equivalent O(1)Dy5 square pyramids,  an edgeedge with one O(5)Dy4 tetrahedra, and edges with two equivalent O(4)Dy4 tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Dy(2) and three equivalent Dy(1) atoms. In the third O site, O(3) is bonded to two equivalent Dy(2) and four equivalent Dy(3) atoms to form ODy6 octahedra that share corners with two equivalent O(5)Dy4 tetrahedra, corners with four equivalent O(4)Dy4 tetrahedra, edges with two equivalent O(3)Dy6 octahedra, edges with four equivalent O(1)Dy5 square pyramids, edges with two equivalent O(4)Dy4 tetrahedra, and edges with four equivalent O(5)Dy4 tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Dy(1) and two equivalent Dy(3) atoms to form ODy4 tetrahedra that share corners with two equivalent O(3)Dy6 octahedra, corners with two equivalent O(1)Dy5 square pyramids, corners with two equivalent O(4)Dy4 tetrahedra, corners with two equivalent O(5)Dy4 tetrahedra,  an edgeedge with one O(3)Dy6 octahedra, edges with two equivalent O(1)Dy5 square pyramids, and  an edgeedge with one O(4)Dy4 tetrahedra. The corner-sharing octahedral tilt angles are 14°. In the fifth O site, O(5) is bonded to one Dy(3) and three equivalent Dy(2) atoms to form ODy4 tetrahedra that share  a cornercorner with one O(3)Dy6 octahedra, corners with five equivalent O(1)Dy5 square pyramids, corners with two equivalent O(4)Dy4 tetrahedra, corners with two equivalent O(5)Dy4 tetrahedra, edges with two equivalent O(3)Dy6 octahedra,  an edgeedge with one O(1)Dy5 square pyramid, and edges with two equivalent O(5)Dy4 tetrahedra. The corner-sharing octahedral tilt angles are 50°. is represented by the CIF file [CIF]
data_Dy2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.484
_cell_length_b   7.173
_cell_length_c   8.596
_cell_angle_alpha   99.803
_cell_angle_beta   89.999
_cell_angle_gamma   104.055
_symmetry_Int_Tables_number   1
_cell_volume   205.169
_cell_formula_units_Z   3
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
  Dy  Dy0  1  0.635  0.270  0.487  1.0
  Dy  Dy1  1  0.691  0.382  0.138  1.0
  Dy  Dy2  1  0.033  0.066  0.813  1.0
  Dy  Dy3  1  0.365  0.730  0.513  1.0
  Dy  Dy4  1  0.309  0.618  0.862  1.0
  Dy  Dy5  1  0.967  0.934  0.187  1.0
  O  O6  1  0.872  0.744  0.718  1.0
  O  O7  1  0.795  0.589  0.376  1.0
  O  O8  1  0.128  0.256  0.282  1.0
  O  O9  1  0.205  0.411  0.624  1.0
  O  O10  1  0.500  0.000  0.000  1.0
  O  O11  1  0.471  0.943  0.344  1.0
  O  O12  1  0.529  0.057  0.656  1.0
  O  O13  1  0.175  0.350  0.970  1.0
  O  O14  1  0.825  0.650  0.030  1.0
[/CIF]
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