The structure described by Sr11Bi10 crystallizes in the monoclinic C2/m space group. There are seven inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one Bi(1), one Bi(4), one Bi(5), two equivalent Bi(3), and two equivalent Bi(7) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one Bi(2), two equivalent Bi(3), two equivalent Bi(6), and two equivalent Bi(7) atoms. In the third Sr site, Sr(3) is bonded in a 7-coordinate geometry to one Bi(1), one Bi(2), one Bi(4), one Bi(6), one Bi(8), and two equivalent Bi(3) atoms. In the fourth Sr site, Sr(4) is bonded in a 7-coordinate geometry to one Bi(1), one Bi(2), one Bi(5), one Bi(6), one Bi(8), and two equivalent Bi(3) atoms. In the fifth Sr site, Sr(5) is bonded in a 9-coordinate geometry to one Bi(4), one Bi(5), one Bi(7), two equivalent Bi(1), two equivalent Bi(2), and two equivalent Bi(6) atoms. In the sixth Sr site, Sr(6) is bonded to one Bi(3), one Bi(7), one Bi(8), two equivalent Bi(4), and two equivalent Bi(6) atoms to form a mixture of distorted face, corner, and edge-sharing SrBi7 pentagonal bipyramids. In the seventh Sr site, Sr(7) is bonded to one Bi(3), one Bi(7), one Bi(8), two equivalent Bi(5), and two equivalent Bi(6) atoms to form a mixture of distorted face, corner, and edge-sharing SrBi7 pentagonal bipyramids. There are eight inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 11-coordinate geometry to one Sr(1), two equivalent Sr(3), two equivalent Sr(4), two equivalent Sr(5), one Bi(4), one Bi(5), and two equivalent Bi(2) atoms. In the second Bi site, Bi(2) is bonded in a 11-coordinate geometry to one Sr(2), two equivalent Sr(3), two equivalent Sr(4), two equivalent Sr(5), two equivalent Bi(1), and two equivalent Bi(6) atoms. In the third Bi site, Bi(3) is bonded in a 8-coordinate geometry to one Sr(1), one Sr(2), one Sr(6), one Sr(7), two equivalent Sr(3), and two equivalent Sr(4) atoms. In the fourth Bi site, Bi(4) is bonded in a 10-coordinate geometry to one Sr(1), one Sr(5), two equivalent Sr(3), four equivalent Sr(6), one Bi(1), and one Bi(4) atom. In the fifth Bi site, Bi(5) is bonded in a 10-coordinate geometry to one Sr(1), one Sr(5), two equivalent Sr(4), four equivalent Sr(7), one Bi(1), and one Bi(5) atom. In the sixth Bi site, Bi(6) is bonded in a 10-coordinate geometry to one Sr(2), one Sr(3), one Sr(4), one Sr(5), two equivalent Sr(6), two equivalent Sr(7), one Bi(2), and one Bi(6) atom. In the seventh Bi site, Bi(7) is bonded in a 9-coordinate geometry to one Sr(5), two equivalent Sr(1), two equivalent Sr(2), two equivalent Sr(6), and two equivalent Sr(7) atoms. In the eighth Bi site, Bi(8) is bonded in a 8-coordinate geometry to two equivalent Sr(3), two equivalent Sr(4), two equivalent Sr(6), and two equivalent Sr(7) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr11Bi10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.930
_cell_length_b   12.930
_cell_length_c   13.014
_cell_angle_alpha   119.786
_cell_angle_beta   119.786
_cell_angle_gamma   90.023
_symmetry_Int_Tables_number   1
_cell_volume   1548.062
_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
  Sr  Sr0  1  0.834  0.834  1.000  1.0
  Sr  Sr1  1  0.166  0.834  0.000  1.0
  Sr  Sr2  1  0.834  0.166  0.000  1.0
  Sr  Sr3  1  0.166  0.166  0.000  1.0
  Sr  Sr4  1  0.603  0.943  0.207  1.0
  Sr  Sr5  1  0.736  0.396  0.793  1.0
  Sr  Sr6  1  0.057  0.397  0.793  1.0
  Sr  Sr7  1  0.397  0.057  0.793  1.0
  Sr  Sr8  1  0.396  0.736  0.793  1.0
  Sr  Sr9  1  0.264  0.604  0.207  1.0
  Sr  Sr10  1  0.943  0.603  0.207  1.0
  Sr  Sr11  1  0.604  0.264  0.207  1.0
  Sr  Sr12  1  0.661  0.661  0.323  1.0
  Sr  Sr13  1  0.339  0.339  0.677  1.0
  Sr  Sr14  1  0.939  0.190  0.380  1.0
  Sr  Sr15  1  0.810  0.559  0.620  1.0
  Sr  Sr16  1  0.810  0.061  0.620  1.0
  Sr  Sr17  1  0.559  0.810  0.620  1.0
  Sr  Sr18  1  0.061  0.810  0.620  1.0
  Sr  Sr19  1  0.190  0.939  0.380  1.0
  Sr  Sr20  1  0.441  0.190  0.380  1.0
  Sr  Sr21  1  0.190  0.441  0.380  1.0
  Bi  Bi22  1  0.376  0.376  0.001  1.0
  Bi  Bi23  1  0.623  0.377  0.000  1.0
  Bi  Bi24  1  0.377  0.623  0.000  1.0
  Bi  Bi25  1  0.624  0.624  0.999  1.0
  Bi  Bi26  1  0.651  1.000  0.000  1.0
  Bi  Bi27  1  1.000  0.651  0.000  1.0
  Bi  Bi28  1  0.000  0.349  1.000  1.0
  Bi  Bi29  1  0.349  0.000  1.000  1.0
  Bi  Bi30  1  0.119  0.119  0.650  1.0
  Bi  Bi31  1  0.468  0.468  0.349  1.0
  Bi  Bi32  1  0.881  0.881  0.350  1.0
  Bi  Bi33  1  0.468  0.882  0.350  1.0
  Bi  Bi34  1  0.882  0.468  0.350  1.0
  Bi  Bi35  1  0.532  0.118  0.650  1.0
  Bi  Bi36  1  0.118  0.532  0.650  1.0
  Bi  Bi37  1  0.532  0.532  0.651  1.0
  Bi  Bi38  1  0.874  0.874  0.748  1.0
  Bi  Bi39  1  0.126  0.126  0.252  1.0
  Bi  Bi40  1  0.250  0.750  0.500  1.0
  Bi  Bi41  1  0.750  0.250  0.500  1.0
[/CIF]
.
The structure described by Sr11Bi10 crystallizes in the monoclinic C2/m space group. There are seven inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one Bi(1), one Bi(4), one Bi(5), two equivalent Bi(3), and two equivalent Bi(7) atoms. In the second Sr site, Sr(2) is bonded in a 7-coordinate geometry to one Bi(2), two equivalent Bi(3), two equivalent Bi(6), and two equivalent Bi(7) atoms. In the third Sr site, Sr(3) is bonded in a 7-coordinate geometry to one Bi(1), one Bi(2), one Bi(4), one Bi(6), one Bi(8), and two equivalent Bi(3) atoms. In the fourth Sr site, Sr(4) is bonded in a 7-coordinate geometry to one Bi(1), one Bi(2), one Bi(5), one Bi(6), one Bi(8), and two equivalent Bi(3) atoms. In the fifth Sr site, Sr(5) is bonded in a 9-coordinate geometry to one Bi(4), one Bi(5), one Bi(7), two equivalent Bi(1), two equivalent Bi(2), and two equivalent Bi(6) atoms. In the sixth Sr site, Sr(6) is bonded to one Bi(3), one Bi(7), one Bi(8), two equivalent Bi(4), and two equivalent Bi(6) atoms to form a mixture of distorted face, corner, and edge-sharing SrBi7 pentagonal bipyramids. In the seventh Sr site, Sr(7) is bonded to one Bi(3), one Bi(7), one Bi(8), two equivalent Bi(5), and two equivalent Bi(6) atoms to form a mixture of distorted face, corner, and edge-sharing SrBi7 pentagonal bipyramids. There are eight inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 11-coordinate geometry to one Sr(1), two equivalent Sr(3), two equivalent Sr(4), two equivalent Sr(5), one Bi(4), one Bi(5), and two equivalent Bi(2) atoms. In the second Bi site, Bi(2) is bonded in a 11-coordinate geometry to one Sr(2), two equivalent Sr(3), two equivalent Sr(4), two equivalent Sr(5), two equivalent Bi(1), and two equivalent Bi(6) atoms. In the third Bi site, Bi(3) is bonded in a 8-coordinate geometry to one Sr(1), one Sr(2), one Sr(6), one Sr(7), two equivalent Sr(3), and two equivalent Sr(4) atoms. In the fourth Bi site, Bi(4) is bonded in a 10-coordinate geometry to one Sr(1), one Sr(5), two equivalent Sr(3), four equivalent Sr(6), one Bi(1), and one Bi(4) atom. In the fifth Bi site, Bi(5) is bonded in a 10-coordinate geometry to one Sr(1), one Sr(5), two equivalent Sr(4), four equivalent Sr(7), one Bi(1), and one Bi(5) atom. In the sixth Bi site, Bi(6) is bonded in a 10-coordinate geometry to one Sr(2), one Sr(3), one Sr(4), one Sr(5), two equivalent Sr(6), two equivalent Sr(7), one Bi(2), and one Bi(6) atom. In the seventh Bi site, Bi(7) is bonded in a 9-coordinate geometry to one Sr(5), two equivalent Sr(1), two equivalent Sr(2), two equivalent Sr(6), and two equivalent Sr(7) atoms. In the eighth Bi site, Bi(8) is bonded in a 8-coordinate geometry to two equivalent Sr(3), two equivalent Sr(4), two equivalent Sr(6), and two equivalent Sr(7) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Sr11Bi10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.930
_cell_length_b   12.930
_cell_length_c   13.014
_cell_angle_alpha   119.786
_cell_angle_beta   119.786
_cell_angle_gamma   90.023
_symmetry_Int_Tables_number   1
_cell_volume   1548.062
_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
  Sr  Sr0  1  0.834  0.834  1.000  1.0
  Sr  Sr1  1  0.166  0.834  0.000  1.0
  Sr  Sr2  1  0.834  0.166  0.000  1.0
  Sr  Sr3  1  0.166  0.166  0.000  1.0
  Sr  Sr4  1  0.603  0.943  0.207  1.0
  Sr  Sr5  1  0.736  0.396  0.793  1.0
  Sr  Sr6  1  0.057  0.397  0.793  1.0
  Sr  Sr7  1  0.397  0.057  0.793  1.0
  Sr  Sr8  1  0.396  0.736  0.793  1.0
  Sr  Sr9  1  0.264  0.604  0.207  1.0
  Sr  Sr10  1  0.943  0.603  0.207  1.0
  Sr  Sr11  1  0.604  0.264  0.207  1.0
  Sr  Sr12  1  0.661  0.661  0.323  1.0
  Sr  Sr13  1  0.339  0.339  0.677  1.0
  Sr  Sr14  1  0.939  0.190  0.380  1.0
  Sr  Sr15  1  0.810  0.559  0.620  1.0
  Sr  Sr16  1  0.810  0.061  0.620  1.0
  Sr  Sr17  1  0.559  0.810  0.620  1.0
  Sr  Sr18  1  0.061  0.810  0.620  1.0
  Sr  Sr19  1  0.190  0.939  0.380  1.0
  Sr  Sr20  1  0.441  0.190  0.380  1.0
  Sr  Sr21  1  0.190  0.441  0.380  1.0
  Bi  Bi22  1  0.376  0.376  0.001  1.0
  Bi  Bi23  1  0.623  0.377  0.000  1.0
  Bi  Bi24  1  0.377  0.623  0.000  1.0
  Bi  Bi25  1  0.624  0.624  0.999  1.0
  Bi  Bi26  1  0.651  1.000  0.000  1.0
  Bi  Bi27  1  1.000  0.651  0.000  1.0
  Bi  Bi28  1  0.000  0.349  1.000  1.0
  Bi  Bi29  1  0.349  0.000  1.000  1.0
  Bi  Bi30  1  0.119  0.119  0.650  1.0
  Bi  Bi31  1  0.468  0.468  0.349  1.0
  Bi  Bi32  1  0.881  0.881  0.350  1.0
  Bi  Bi33  1  0.468  0.882  0.350  1.0
  Bi  Bi34  1  0.882  0.468  0.350  1.0
  Bi  Bi35  1  0.532  0.118  0.650  1.0
  Bi  Bi36  1  0.118  0.532  0.650  1.0
  Bi  Bi37  1  0.532  0.532  0.651  1.0
  Bi  Bi38  1  0.874  0.874  0.748  1.0
  Bi  Bi39  1  0.126  0.126  0.252  1.0
  Bi  Bi40  1  0.250  0.750  0.500  1.0
  Bi  Bi41  1  0.750  0.250  0.500  1.0
[/CIF]
.