The structure described by Yb2Si2O7 crystallizes in the monoclinic C2/m space group. Yb(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form distorted YbO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra and edges with three equivalent Yb(1)O6 octahedra. Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with six equivalent Yb(1)O6 octahedra and  a cornercorner with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-56°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Yb(1) and one Si(1) atom. In the second O site, O(2) is bonded in a linear geometry to two equivalent Si(1) atoms. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Yb(1) and one Si(1) atom. is represented by the CIF card [CIF]
data_Yb2Si2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.776
_cell_length_b   5.776
_cell_length_c   4.911
_cell_angle_alpha   82.768
_cell_angle_beta   82.768
_cell_angle_gamma   107.129
_symmetry_Int_Tables_number   1
_cell_volume   153.012
_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
  Yb  Yb0  1  0.310  0.690  0.000  1.0
  Yb  Yb1  1  0.690  0.310  0.000  1.0
  Si  Si2  1  0.779  0.779  0.399  1.0
  Si  Si3  1  0.221  0.221  0.601  1.0
  O  O4  1  0.908  0.621  0.214  1.0
  O  O5  1  0.379  0.092  0.786  1.0
  O  O6  1  0.621  0.908  0.214  1.0
  O  O7  1  0.092  0.379  0.786  1.0
  O  O8  1  0.000  0.000  0.500  1.0
  O  O9  1  0.370  0.370  0.302  1.0
  O  O10  1  0.630  0.630  0.698  1.0
[/CIF]
.
The structure described by Yb2Si2O7 crystallizes in the monoclinic C2/m space group. Yb(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form distorted YbO6 octahedra that share corners with six equivalent Si(1)O4 tetrahedra and edges with three equivalent Yb(1)O6 octahedra. Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with six equivalent Yb(1)O6 octahedra and  a cornercorner with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 47-56°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Yb(1) and one Si(1) atom. In the second O site, O(2) is bonded in a linear geometry to two equivalent Si(1) atoms. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Yb(1) and one Si(1) atom. is represented by the CIF card [CIF]
data_Yb2Si2O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.776
_cell_length_b   5.776
_cell_length_c   4.911
_cell_angle_alpha   82.768
_cell_angle_beta   82.768
_cell_angle_gamma   107.129
_symmetry_Int_Tables_number   1
_cell_volume   153.012
_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
  Yb  Yb0  1  0.310  0.690  0.000  1.0
  Yb  Yb1  1  0.690  0.310  0.000  1.0
  Si  Si2  1  0.779  0.779  0.399  1.0
  Si  Si3  1  0.221  0.221  0.601  1.0
  O  O4  1  0.908  0.621  0.214  1.0
  O  O5  1  0.379  0.092  0.786  1.0
  O  O6  1  0.621  0.908  0.214  1.0
  O  O7  1  0.092  0.379  0.786  1.0
  O  O8  1  0.000  0.000  0.500  1.0
  O  O9  1  0.370  0.370  0.302  1.0
  O  O10  1  0.630  0.630  0.698  1.0
[/CIF]
.