The structure described by Yb2Si is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to four equivalent Si(1) atoms to form a mixture of distorted corner and edge-sharing YbSi4 tetrahedra. In the second Yb site, Yb(2) is bonded in a 5-coordinate geometry to five equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to four equivalent Yb(1) and five equivalent Yb(2) atoms. is represented by the CIF card [CIF]
data_Yb2Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.790
_cell_length_b   7.309
_cell_length_c   8.845
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   309.622
_cell_formula_units_Z   4
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  0.750  0.839  0.923  1.0
  Yb  Yb1  1  0.250  0.161  0.077  1.0
  Yb  Yb2  1  0.250  0.661  0.423  1.0
  Yb  Yb3  1  0.750  0.339  0.577  1.0
  Yb  Yb4  1  0.750  0.983  0.314  1.0
  Yb  Yb5  1  0.250  0.017  0.686  1.0
  Yb  Yb6  1  0.250  0.517  0.814  1.0
  Yb  Yb7  1  0.750  0.483  0.186  1.0
  Si  Si8  1  0.750  0.749  0.601  1.0
  Si  Si9  1  0.250  0.251  0.399  1.0
  Si  Si10  1  0.250  0.751  0.101  1.0
  Si  Si11  1  0.750  0.249  0.899  1.0
[/CIF]
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The structure described by Yb2Si is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Yb sites. In the first Yb site, Yb(1) is bonded to four equivalent Si(1) atoms to form a mixture of distorted corner and edge-sharing YbSi4 tetrahedra. In the second Yb site, Yb(2) is bonded in a 5-coordinate geometry to five equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to four equivalent Yb(1) and five equivalent Yb(2) atoms. is represented by the CIF card [CIF]
data_Yb2Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.790
_cell_length_b   7.309
_cell_length_c   8.845
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   309.622
_cell_formula_units_Z   4
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  0.750  0.839  0.923  1.0
  Yb  Yb1  1  0.250  0.161  0.077  1.0
  Yb  Yb2  1  0.250  0.661  0.423  1.0
  Yb  Yb3  1  0.750  0.339  0.577  1.0
  Yb  Yb4  1  0.750  0.983  0.314  1.0
  Yb  Yb5  1  0.250  0.017  0.686  1.0
  Yb  Yb6  1  0.250  0.517  0.814  1.0
  Yb  Yb7  1  0.750  0.483  0.186  1.0
  Si  Si8  1  0.750  0.749  0.601  1.0
  Si  Si9  1  0.250  0.251  0.399  1.0
  Si  Si10  1  0.250  0.751  0.101  1.0
  Si  Si11  1  0.750  0.249  0.899  1.0
[/CIF]
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