The material described by Dy2Ge2O5 crystallizes in the tetragonal P4/mmm space group. Dy(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent O(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a body-centered cubic geometry to eight equivalent O(1) atoms. In the second Ge site, Ge(2) is bonded in a distorted square co-planar geometry to four equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Dy(1) and two equivalent Ge(1) atoms to form ODy2Ge2 tetrahedra that share corners with two equivalent O(2)Dy2Ge4 octahedra, corners with ten equivalent O(1)Dy2Ge2 tetrahedra, and edges with five equivalent O(1)Dy2Ge2 tetrahedra. The corner-sharing octahedral tilt angles are 56°. In the second O site, O(2) is bonded to two equivalent Dy(1) and four equivalent Ge(2) atoms to form distorted ODy2Ge4 octahedra that share corners with four equivalent O(2)Dy2Ge4 octahedra, corners with eight equivalent O(1)Dy2Ge2 tetrahedra, and edges with four equivalent O(2)Dy2Ge4 octahedra. The corner-sharing octahedra are not tilted. is represented by the Crystallographic Information File (CIF) [CIF]
data_Dy2Ge2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.609
_cell_length_b   3.609
_cell_length_c   9.387
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   122.265
_cell_formula_units_Z   1
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  0.000  0.000  0.254  1.0
  Dy  Dy1  1  0.000  0.000  0.746  1.0
  Ge  Ge2  1  0.500  0.500  0.000  1.0
  Ge  Ge3  1  0.500  0.500  0.500  1.0
  O  O4  1  0.000  0.500  0.126  1.0
  O  O5  1  0.000  0.500  0.874  1.0
  O  O6  1  0.000  0.000  0.500  1.0
  O  O7  1  0.500  0.000  0.126  1.0
  O  O8  1  0.500  0.000  0.874  1.0
[/CIF]
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The material described by Dy2Ge2O5 crystallizes in the tetragonal P4/mmm space group. Dy(1) is bonded in a 5-coordinate geometry to one O(2) and four equivalent O(1) atoms. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a body-centered cubic geometry to eight equivalent O(1) atoms. In the second Ge site, Ge(2) is bonded in a distorted square co-planar geometry to four equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Dy(1) and two equivalent Ge(1) atoms to form ODy2Ge2 tetrahedra that share corners with two equivalent O(2)Dy2Ge4 octahedra, corners with ten equivalent O(1)Dy2Ge2 tetrahedra, and edges with five equivalent O(1)Dy2Ge2 tetrahedra. The corner-sharing octahedral tilt angles are 56°. In the second O site, O(2) is bonded to two equivalent Dy(1) and four equivalent Ge(2) atoms to form distorted ODy2Ge4 octahedra that share corners with four equivalent O(2)Dy2Ge4 octahedra, corners with eight equivalent O(1)Dy2Ge2 tetrahedra, and edges with four equivalent O(2)Dy2Ge4 octahedra. The corner-sharing octahedra are not tilted. is represented by the Crystallographic Information File (CIF) [CIF]
data_Dy2Ge2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.609
_cell_length_b   3.609
_cell_length_c   9.387
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   122.265
_cell_formula_units_Z   1
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  0.000  0.000  0.254  1.0
  Dy  Dy1  1  0.000  0.000  0.746  1.0
  Ge  Ge2  1  0.500  0.500  0.000  1.0
  Ge  Ge3  1  0.500  0.500  0.500  1.0
  O  O4  1  0.000  0.500  0.126  1.0
  O  O5  1  0.000  0.500  0.874  1.0
  O  O6  1  0.000  0.000  0.500  1.0
  O  O7  1  0.500  0.000  0.126  1.0
  O  O8  1  0.500  0.000  0.874  1.0
[/CIF]
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