The material described by Dy2Ge2O7 crystallizes in the monoclinic C2 space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted DyO6 pentagonal pyramids that share corners with six equivalent Ge(1)O4 tetrahedra and edges with three equivalent Dy(2)O6 pentagonal pyramids. In the second Dy site, Dy(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted DyO6 pentagonal pyramids that share corners with six equivalent Ge(1)O4 tetrahedra and edges with three equivalent Dy(1)O6 pentagonal pyramids. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with three equivalent Dy(1)O6 pentagonal pyramids, corners with three equivalent Dy(2)O6 pentagonal pyramids, and  a cornercorner with one Ge(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Dy(1), one Dy(2), and one Ge(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Dy(1), one Dy(2), and one Ge(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Dy(1), one Dy(2), and one Ge(1) atom. In the fourth O site, O(4) is bonded in a linear geometry to two equivalent Ge(1) atoms. is represented by the CIF card [CIF]
data_Dy2Ge2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.750
_cell_length_b   5.750
_cell_length_c   4.962
_cell_angle_alpha   82.626
_cell_angle_beta   97.374
_cell_angle_gamma   74.889
_symmetry_Int_Tables_number   1
_cell_volume   154.819
_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  0.698  0.698  0.000  1.0
  Dy  Dy1  1  0.310  0.310  0.000  1.0
  Ge  Ge2  1  0.234  0.776  0.410  1.0
  Ge  Ge3  1  0.776  0.234  0.590  1.0
  O  O4  1  0.085  0.609  0.213  1.0
  O  O5  1  0.405  0.922  0.213  1.0
  O  O6  1  0.402  0.605  0.724  1.0
  O  O7  1  0.014  0.014  0.500  1.0
  O  O8  1  0.605  0.402  0.276  1.0
  O  O9  1  0.922  0.405  0.787  1.0
  O  O10  1  0.609  0.085  0.787  1.0
[/CIF]
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The material described by Dy2Ge2O7 crystallizes in the monoclinic C2 space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted DyO6 pentagonal pyramids that share corners with six equivalent Ge(1)O4 tetrahedra and edges with three equivalent Dy(2)O6 pentagonal pyramids. In the second Dy site, Dy(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted DyO6 pentagonal pyramids that share corners with six equivalent Ge(1)O4 tetrahedra and edges with three equivalent Dy(1)O6 pentagonal pyramids. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with three equivalent Dy(1)O6 pentagonal pyramids, corners with three equivalent Dy(2)O6 pentagonal pyramids, and  a cornercorner with one Ge(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Dy(1), one Dy(2), and one Ge(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Dy(1), one Dy(2), and one Ge(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Dy(1), one Dy(2), and one Ge(1) atom. In the fourth O site, O(4) is bonded in a linear geometry to two equivalent Ge(1) atoms. is represented by the CIF card [CIF]
data_Dy2Ge2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.750
_cell_length_b   5.750
_cell_length_c   4.962
_cell_angle_alpha   82.626
_cell_angle_beta   97.374
_cell_angle_gamma   74.889
_symmetry_Int_Tables_number   1
_cell_volume   154.819
_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  0.698  0.698  0.000  1.0
  Dy  Dy1  1  0.310  0.310  0.000  1.0
  Ge  Ge2  1  0.234  0.776  0.410  1.0
  Ge  Ge3  1  0.776  0.234  0.590  1.0
  O  O4  1  0.085  0.609  0.213  1.0
  O  O5  1  0.405  0.922  0.213  1.0
  O  O6  1  0.402  0.605  0.724  1.0
  O  O7  1  0.014  0.014  0.500  1.0
  O  O8  1  0.605  0.402  0.276  1.0
  O  O9  1  0.922  0.405  0.787  1.0
  O  O10  1  0.609  0.085  0.787  1.0
[/CIF]
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