The structure described by DyFeGe2O7 crystallizes in the monoclinic P2_1/m space group. Dy(1) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(3), one O(4), one O(5), and one O(7) atom. Fe(1) is bonded to one O(2), one O(3), one O(4), one O(5), one O(8), and one O(9) atom to form distorted FeO6 octahedra that share corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra,  an edgeedge with one Fe(1)O6 octahedra, and  an edgeedge with one Ge(3)O5 tetrahedra. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(6), one O(8), and two equivalent O(5) atoms to form GeO4 tetrahedra that share corners with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-54°. In the second Ge site, Ge(2) is bonded to one O(1), one O(9), and two equivalent O(2) atoms to form GeO4 tetrahedra that share corners with four equivalent Fe(1)O6 octahedra and corners with two equivalent Ge(3)O5 tetrahedra. The corner-sharing octahedral tilt angles range from 44-54°. In the third Ge site, Ge(3) is bonded to one O(1), one O(10), one O(9), and two equivalent O(4) atoms to form distorted GeO5 tetrahedra that share corners with two equivalent Ge(2)O4 tetrahedra and edges with two equivalent Fe(1)O6 octahedra. In the fourth Ge site, Ge(4) is bonded in a 5-coordinate geometry to one O(6), one O(7), one O(8), and two equivalent O(3) atoms. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ge(2) and one Ge(3) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Dy(1), one Fe(1), and one Ge(2) atom. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Dy(1), one Fe(1), and one Ge(4) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Dy(1), one Fe(1), and one Ge(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Dy(1), one Fe(1), and one Ge(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Ge(1) and one Ge(4) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to two equivalent Dy(1) and one Ge(4) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to two equivalent Fe(1), one Ge(1), and one Ge(4) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to two equivalent Fe(1), one Ge(2), and one Ge(3) atom. In the tenth O site, O(10) is bonded in a trigonal planar geometry to two equivalent Dy(1) and one Ge(3) atom. is represented by the CIF card [CIF]
data_DyFeGe2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.742
_cell_length_b   6.944
_cell_length_c   6.944
_cell_angle_alpha   77.370
_cell_angle_beta   69.179
_cell_angle_gamma   69.179
_symmetry_Int_Tables_number   1
_cell_volume   282.433
_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
  Dy  Dy0  1  0.000  0.293  0.207  1.0
  Dy  Dy1  1  0.000  0.707  0.793  1.0
  Fe  Fe2  1  0.500  0.805  0.695  1.0
  Fe  Fe3  1  0.500  0.195  0.305  1.0
  Ge  Ge4  1  0.485  0.718  0.218  1.0
  Ge  Ge5  1  0.515  0.282  0.782  1.0
  Ge  Ge6  1  0.926  0.802  0.302  1.0
  Ge  Ge7  1  0.074  0.198  0.698  1.0
  O  O8  1  0.188  0.814  0.314  1.0
  O  O9  1  0.598  0.775  0.946  1.0
  O  O10  1  0.170  0.287  0.433  1.0
  O  O11  1  0.598  0.446  0.275  1.0
  O  O12  1  0.170  0.933  0.787  1.0
  O  O13  1  0.402  0.554  0.725  1.0
  O  O14  1  0.402  0.225  0.054  1.0
  O  O15  1  0.965  0.632  0.132  1.0
  O  O16  1  0.830  0.713  0.567  1.0
  O  O17  1  0.537  0.866  0.366  1.0
  O  O18  1  0.463  0.134  0.634  1.0
  O  O19  1  0.830  0.067  0.213  1.0
  O  O20  1  0.035  0.368  0.868  1.0
  O  O21  1  0.812  0.186  0.686  1.0
[/CIF]
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The structure described by DyFeGe2O7 crystallizes in the monoclinic P2_1/m space group. Dy(1) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(3), one O(4), one O(5), and one O(7) atom. Fe(1) is bonded to one O(2), one O(3), one O(4), one O(5), one O(8), and one O(9) atom to form distorted FeO6 octahedra that share corners with two equivalent Ge(1)O4 tetrahedra, corners with two equivalent Ge(2)O4 tetrahedra,  an edgeedge with one Fe(1)O6 octahedra, and  an edgeedge with one Ge(3)O5 tetrahedra. There are four inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(6), one O(8), and two equivalent O(5) atoms to form GeO4 tetrahedra that share corners with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-54°. In the second Ge site, Ge(2) is bonded to one O(1), one O(9), and two equivalent O(2) atoms to form GeO4 tetrahedra that share corners with four equivalent Fe(1)O6 octahedra and corners with two equivalent Ge(3)O5 tetrahedra. The corner-sharing octahedral tilt angles range from 44-54°. In the third Ge site, Ge(3) is bonded to one O(1), one O(10), one O(9), and two equivalent O(4) atoms to form distorted GeO5 tetrahedra that share corners with two equivalent Ge(2)O4 tetrahedra and edges with two equivalent Fe(1)O6 octahedra. In the fourth Ge site, Ge(4) is bonded in a 5-coordinate geometry to one O(6), one O(7), one O(8), and two equivalent O(3) atoms. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Ge(2) and one Ge(3) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Dy(1), one Fe(1), and one Ge(2) atom. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Dy(1), one Fe(1), and one Ge(4) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Dy(1), one Fe(1), and one Ge(3) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Dy(1), one Fe(1), and one Ge(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Ge(1) and one Ge(4) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to two equivalent Dy(1) and one Ge(4) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to two equivalent Fe(1), one Ge(1), and one Ge(4) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to two equivalent Fe(1), one Ge(2), and one Ge(3) atom. In the tenth O site, O(10) is bonded in a trigonal planar geometry to two equivalent Dy(1) and one Ge(3) atom. is represented by the CIF card [CIF]
data_DyFeGe2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.742
_cell_length_b   6.944
_cell_length_c   6.944
_cell_angle_alpha   77.370
_cell_angle_beta   69.179
_cell_angle_gamma   69.179
_symmetry_Int_Tables_number   1
_cell_volume   282.433
_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
  Dy  Dy0  1  0.000  0.293  0.207  1.0
  Dy  Dy1  1  0.000  0.707  0.793  1.0
  Fe  Fe2  1  0.500  0.805  0.695  1.0
  Fe  Fe3  1  0.500  0.195  0.305  1.0
  Ge  Ge4  1  0.485  0.718  0.218  1.0
  Ge  Ge5  1  0.515  0.282  0.782  1.0
  Ge  Ge6  1  0.926  0.802  0.302  1.0
  Ge  Ge7  1  0.074  0.198  0.698  1.0
  O  O8  1  0.188  0.814  0.314  1.0
  O  O9  1  0.598  0.775  0.946  1.0
  O  O10  1  0.170  0.287  0.433  1.0
  O  O11  1  0.598  0.446  0.275  1.0
  O  O12  1  0.170  0.933  0.787  1.0
  O  O13  1  0.402  0.554  0.725  1.0
  O  O14  1  0.402  0.225  0.054  1.0
  O  O15  1  0.965  0.632  0.132  1.0
  O  O16  1  0.830  0.713  0.567  1.0
  O  O17  1  0.537  0.866  0.366  1.0
  O  O18  1  0.463  0.134  0.634  1.0
  O  O19  1  0.830  0.067  0.213  1.0
  O  O20  1  0.035  0.368  0.868  1.0
  O  O21  1  0.812  0.186  0.686  1.0
[/CIF]
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