The crystal structure described by Yb11Bi10 crystallizes in the tetragonal I4/mmm space group. There are four inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 7-coordinate geometry to one Bi(1), two equivalent Bi(3), two equivalent Bi(4), and two equivalent Bi(5) atoms. In the second Yb site, Yb(2) is bonded to one Bi(1), one Bi(2), one Bi(3), and four equivalent Bi(4) atoms to form a mixture of distorted face, corner, and edge-sharing YbBi7 pentagonal bipyramids. In the third Yb site, Yb(3) is bonded in a 9-coordinate geometry to one Bi(2), four equivalent Bi(4), and four equivalent Bi(5) atoms. In the fourth Yb site, Yb(4) is bonded in a 7-coordinate geometry to one Bi(5), two equivalent Bi(2), two equivalent Bi(3), and two equivalent Bi(4) atoms. There are five inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 8-coordinate geometry to four equivalent Yb(1) and four equivalent Yb(2) atoms. In the second Bi site, Bi(2) is bonded in a 9-coordinate geometry to one Yb(3), four equivalent Yb(2), and four equivalent Yb(4) atoms. In the third Bi site, Bi(3) is bonded in a 8-coordinate geometry to two equivalent Yb(2), two equivalent Yb(4), and four equivalent Yb(1) atoms. In the fourth Bi site, Bi(4) is bonded in a 10-coordinate geometry to one Yb(3), one Yb(4), two equivalent Yb(1), four equivalent Yb(2), one Bi(4), and one Bi(5) atom. In the fifth Bi site, Bi(5) is bonded in a 11-coordinate geometry to one Yb(4), two equivalent Yb(3), four equivalent Yb(1), two equivalent Bi(4), and two equivalent Bi(5) atoms. is represented by the CIF card [CIF]
data_Yb11Bi10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.164
_cell_length_b   12.164
_cell_length_c   12.294
_cell_angle_alpha   119.662
_cell_angle_beta   119.662
_cell_angle_gamma   89.987
_symmetry_Int_Tables_number   1
_cell_volume   1299.401
_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  0.397  0.738  0.794  1.0
  Yb  Yb1  1  0.397  0.056  0.794  1.0
  Yb  Yb2  1  0.738  0.397  0.794  1.0
  Yb  Yb3  1  0.056  0.397  0.794  1.0
  Yb  Yb4  1  0.603  0.262  0.206  1.0
  Yb  Yb5  1  0.603  0.944  0.206  1.0
  Yb  Yb6  1  0.262  0.603  0.206  1.0
  Yb  Yb7  1  0.944  0.603  0.206  1.0
  Yb  Yb8  1  0.190  0.441  0.381  1.0
  Yb  Yb9  1  0.190  0.939  0.381  1.0
  Yb  Yb10  1  0.441  0.190  0.381  1.0
  Yb  Yb11  1  0.939  0.190  0.381  1.0
  Yb  Yb12  1  0.810  0.559  0.619  1.0
  Yb  Yb13  1  0.810  0.061  0.619  1.0
  Yb  Yb14  1  0.559  0.810  0.619  1.0
  Yb  Yb15  1  0.061  0.810  0.619  1.0
  Yb  Yb16  1  0.336  0.336  0.672  1.0
  Yb  Yb17  1  0.664  0.664  0.328  1.0
  Yb  Yb18  1  0.838  0.162  0.000  1.0
  Yb  Yb19  1  0.162  0.838  0.000  1.0
  Yb  Yb20  1  0.162  0.162  0.000  1.0
  Yb  Yb21  1  0.838  0.838  1.000  1.0
  Bi  Bi22  1  0.250  0.750  0.500  1.0
  Bi  Bi23  1  0.750  0.250  0.500  1.0
  Bi  Bi24  1  0.127  0.127  0.255  1.0
  Bi  Bi25  1  0.873  0.873  0.745  1.0
  Bi  Bi26  1  0.653  0.000  0.000  1.0
  Bi  Bi27  1  0.347  1.000  1.000  1.0
  Bi  Bi28  1  1.000  0.347  1.000  1.0
  Bi  Bi29  1  0.000  0.653  0.000  1.0
  Bi  Bi30  1  0.123  0.531  0.653  1.0
  Bi  Bi31  1  0.531  0.123  0.653  1.0
  Bi  Bi32  1  0.531  0.531  0.654  1.0
  Bi  Bi33  1  0.123  0.123  0.653  1.0
  Bi  Bi34  1  0.877  0.469  0.347  1.0
  Bi  Bi35  1  0.469  0.877  0.347  1.0
  Bi  Bi36  1  0.469  0.469  0.346  1.0
  Bi  Bi37  1  0.877  0.877  0.347  1.0
  Bi  Bi38  1  0.632  0.368  0.000  1.0
  Bi  Bi39  1  0.368  0.632  0.000  1.0
  Bi  Bi40  1  0.368  0.368  1.000  1.0
  Bi  Bi41  1  0.632  0.632  0.000  1.0
[/CIF]
.
The crystal structure described by Yb11Bi10 crystallizes in the tetragonal I4/mmm space group. There are four inequivalent Yb sites. In the first Yb site, Yb(1) is bonded in a 7-coordinate geometry to one Bi(1), two equivalent Bi(3), two equivalent Bi(4), and two equivalent Bi(5) atoms. In the second Yb site, Yb(2) is bonded to one Bi(1), one Bi(2), one Bi(3), and four equivalent Bi(4) atoms to form a mixture of distorted face, corner, and edge-sharing YbBi7 pentagonal bipyramids. In the third Yb site, Yb(3) is bonded in a 9-coordinate geometry to one Bi(2), four equivalent Bi(4), and four equivalent Bi(5) atoms. In the fourth Yb site, Yb(4) is bonded in a 7-coordinate geometry to one Bi(5), two equivalent Bi(2), two equivalent Bi(3), and two equivalent Bi(4) atoms. There are five inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 8-coordinate geometry to four equivalent Yb(1) and four equivalent Yb(2) atoms. In the second Bi site, Bi(2) is bonded in a 9-coordinate geometry to one Yb(3), four equivalent Yb(2), and four equivalent Yb(4) atoms. In the third Bi site, Bi(3) is bonded in a 8-coordinate geometry to two equivalent Yb(2), two equivalent Yb(4), and four equivalent Yb(1) atoms. In the fourth Bi site, Bi(4) is bonded in a 10-coordinate geometry to one Yb(3), one Yb(4), two equivalent Yb(1), four equivalent Yb(2), one Bi(4), and one Bi(5) atom. In the fifth Bi site, Bi(5) is bonded in a 11-coordinate geometry to one Yb(4), two equivalent Yb(3), four equivalent Yb(1), two equivalent Bi(4), and two equivalent Bi(5) atoms. is represented by the CIF card [CIF]
data_Yb11Bi10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.164
_cell_length_b   12.164
_cell_length_c   12.294
_cell_angle_alpha   119.662
_cell_angle_beta   119.662
_cell_angle_gamma   89.987
_symmetry_Int_Tables_number   1
_cell_volume   1299.401
_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  0.397  0.738  0.794  1.0
  Yb  Yb1  1  0.397  0.056  0.794  1.0
  Yb  Yb2  1  0.738  0.397  0.794  1.0
  Yb  Yb3  1  0.056  0.397  0.794  1.0
  Yb  Yb4  1  0.603  0.262  0.206  1.0
  Yb  Yb5  1  0.603  0.944  0.206  1.0
  Yb  Yb6  1  0.262  0.603  0.206  1.0
  Yb  Yb7  1  0.944  0.603  0.206  1.0
  Yb  Yb8  1  0.190  0.441  0.381  1.0
  Yb  Yb9  1  0.190  0.939  0.381  1.0
  Yb  Yb10  1  0.441  0.190  0.381  1.0
  Yb  Yb11  1  0.939  0.190  0.381  1.0
  Yb  Yb12  1  0.810  0.559  0.619  1.0
  Yb  Yb13  1  0.810  0.061  0.619  1.0
  Yb  Yb14  1  0.559  0.810  0.619  1.0
  Yb  Yb15  1  0.061  0.810  0.619  1.0
  Yb  Yb16  1  0.336  0.336  0.672  1.0
  Yb  Yb17  1  0.664  0.664  0.328  1.0
  Yb  Yb18  1  0.838  0.162  0.000  1.0
  Yb  Yb19  1  0.162  0.838  0.000  1.0
  Yb  Yb20  1  0.162  0.162  0.000  1.0
  Yb  Yb21  1  0.838  0.838  1.000  1.0
  Bi  Bi22  1  0.250  0.750  0.500  1.0
  Bi  Bi23  1  0.750  0.250  0.500  1.0
  Bi  Bi24  1  0.127  0.127  0.255  1.0
  Bi  Bi25  1  0.873  0.873  0.745  1.0
  Bi  Bi26  1  0.653  0.000  0.000  1.0
  Bi  Bi27  1  0.347  1.000  1.000  1.0
  Bi  Bi28  1  1.000  0.347  1.000  1.0
  Bi  Bi29  1  0.000  0.653  0.000  1.0
  Bi  Bi30  1  0.123  0.531  0.653  1.0
  Bi  Bi31  1  0.531  0.123  0.653  1.0
  Bi  Bi32  1  0.531  0.531  0.654  1.0
  Bi  Bi33  1  0.123  0.123  0.653  1.0
  Bi  Bi34  1  0.877  0.469  0.347  1.0
  Bi  Bi35  1  0.469  0.877  0.347  1.0
  Bi  Bi36  1  0.469  0.469  0.346  1.0
  Bi  Bi37  1  0.877  0.877  0.347  1.0
  Bi  Bi38  1  0.632  0.368  0.000  1.0
  Bi  Bi39  1  0.368  0.632  0.000  1.0
  Bi  Bi40  1  0.368  0.368  1.000  1.0
  Bi  Bi41  1  0.632  0.632  0.000  1.0
[/CIF]
.