The structure described by YbFeGe2O7 crystallizes in the monoclinic C2/m space group. Yb(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. Fe(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted FeO6 octahedra that share corners with four equivalent Ge(1)O4 tetrahedra and  an edgeedge with one Fe(1)O6 octahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(2), one O(5), and two equivalent O(1) atoms to form GeO4 tetrahedra that share corners with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-53°. In the second Ge site, Ge(2) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(5), and two equivalent O(4) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Yb(1), one Fe(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Fe(1), one Ge(1), and one Ge(2) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Yb(1) and one Ge(2) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Yb(1), one Fe(1), and one Ge(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to two equivalent Yb(1), one Ge(1), and one Ge(2) atom. is represented by the CIF file [CIF]
data_YbFeGe2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.912
_cell_length_b   6.912
_cell_length_c   6.770
_cell_angle_alpha   68.591
_cell_angle_beta   68.591
_cell_angle_gamma   75.821
_symmetry_Int_Tables_number   1
_cell_volume   277.962
_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
  Yb  Yb0  1  0.210  0.790  0.000  1.0
  Yb  Yb1  1  0.790  0.210  0.000  1.0
  Fe  Fe2  1  0.304  0.696  0.500  1.0
  Fe  Fe3  1  0.696  0.304  0.500  1.0
  Ge  Ge4  1  0.225  0.225  0.464  1.0
  Ge  Ge5  1  0.775  0.775  0.536  1.0
  Ge  Ge6  1  0.299  0.299  0.917  1.0
  Ge  Ge7  1  0.701  0.701  0.083  1.0
  O  O8  1  0.050  0.718  0.422  1.0
  O  O9  1  0.282  0.950  0.578  1.0
  O  O10  1  0.950  0.282  0.578  1.0
  O  O11  1  0.718  0.050  0.422  1.0
  O  O12  1  0.628  0.628  0.479  1.0
  O  O13  1  0.372  0.372  0.521  1.0
  O  O14  1  0.867  0.867  0.041  1.0
  O  O15  1  0.133  0.133  0.959  1.0
  O  O16  1  0.790  0.428  0.188  1.0
  O  O17  1  0.572  0.210  0.812  1.0
  O  O18  1  0.428  0.790  0.188  1.0
  O  O19  1  0.210  0.572  0.812  1.0
  O  O20  1  0.676  0.676  0.834  1.0
  O  O21  1  0.324  0.324  0.166  1.0
[/CIF]
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The structure described by YbFeGe2O7 crystallizes in the monoclinic C2/m space group. Yb(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. Fe(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form distorted FeO6 octahedra that share corners with four equivalent Ge(1)O4 tetrahedra and  an edgeedge with one Fe(1)O6 octahedra. There are two inequivalent Ge sites. In the first Ge site, Ge(1) is bonded to one O(2), one O(5), and two equivalent O(1) atoms to form GeO4 tetrahedra that share corners with four equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-53°. In the second Ge site, Ge(2) is bonded in a 4-coordinate geometry to one O(2), one O(3), one O(5), and two equivalent O(4) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Yb(1), one Fe(1), and one Ge(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Fe(1), one Ge(1), and one Ge(2) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Yb(1) and one Ge(2) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Yb(1), one Fe(1), and one Ge(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to two equivalent Yb(1), one Ge(1), and one Ge(2) atom. is represented by the CIF file [CIF]
data_YbFeGe2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.912
_cell_length_b   6.912
_cell_length_c   6.770
_cell_angle_alpha   68.591
_cell_angle_beta   68.591
_cell_angle_gamma   75.821
_symmetry_Int_Tables_number   1
_cell_volume   277.962
_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
  Yb  Yb0  1  0.210  0.790  0.000  1.0
  Yb  Yb1  1  0.790  0.210  0.000  1.0
  Fe  Fe2  1  0.304  0.696  0.500  1.0
  Fe  Fe3  1  0.696  0.304  0.500  1.0
  Ge  Ge4  1  0.225  0.225  0.464  1.0
  Ge  Ge5  1  0.775  0.775  0.536  1.0
  Ge  Ge6  1  0.299  0.299  0.917  1.0
  Ge  Ge7  1  0.701  0.701  0.083  1.0
  O  O8  1  0.050  0.718  0.422  1.0
  O  O9  1  0.282  0.950  0.578  1.0
  O  O10  1  0.950  0.282  0.578  1.0
  O  O11  1  0.718  0.050  0.422  1.0
  O  O12  1  0.628  0.628  0.479  1.0
  O  O13  1  0.372  0.372  0.521  1.0
  O  O14  1  0.867  0.867  0.041  1.0
  O  O15  1  0.133  0.133  0.959  1.0
  O  O16  1  0.790  0.428  0.188  1.0
  O  O17  1  0.572  0.210  0.812  1.0
  O  O18  1  0.428  0.790  0.188  1.0
  O  O19  1  0.210  0.572  0.812  1.0
  O  O20  1  0.676  0.676  0.834  1.0
  O  O21  1  0.324  0.324  0.166  1.0
[/CIF]
.