The material described by Sr11Al4Sn3 crystallizes in the cubic Fm-3m space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to three equivalent Al(1) and three equivalent Sn(1) atoms. In the second Sr site, Sr(2) is bonded in a distorted square co-planar geometry to one Sr(3), two equivalent Al(1), and two equivalent Sn(1) atoms. In the third Sr site, Sr(3) is bonded in a cuboctahedral geometry to twelve equivalent Sr(2) atoms. In the fourth Sr site, Sr(4) is bonded in a distorted octahedral geometry to six equivalent Sn(1) atoms. Al(1) is bonded in a 9-coordinate geometry to three equivalent Sr(1), three equivalent Sr(2), and three equivalent Al(1) atoms. Sn(1) is bonded in a 9-coordinate geometry to one Sr(4), four equivalent Sr(1), and four equivalent Sr(2) atoms. is represented by the CIF file [CIF]
data_Sr11Al4Sn3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.327
_cell_length_b   12.327
_cell_length_c   12.327
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   1324.425
_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  0.129  0.129  0.129  1.0
  Sr  Sr1  1  0.500  0.500  0.835  1.0
  Sr  Sr2  1  0.500  0.165  0.835  1.0
  Sr  Sr3  1  0.871  0.387  0.871  1.0
  Sr  Sr4  1  0.129  0.613  0.129  1.0
  Sr  Sr5  1  0.500  0.835  0.500  1.0
  Sr  Sr6  1  0.165  0.500  0.500  1.0
  Sr  Sr7  1  0.871  0.871  0.387  1.0
  Sr  Sr8  1  0.500  0.835  0.165  1.0
  Sr  Sr9  1  0.613  0.129  0.129  1.0
  Sr  Sr10  1  0.835  0.165  0.500  1.0
  Sr  Sr11  1  0.871  0.871  0.871  1.0
  Sr  Sr12  1  0.387  0.871  0.871  1.0
  Sr  Sr13  1  0.835  0.500  0.165  1.0
  Sr  Sr14  1  0.500  0.500  0.500  1.0
  Sr  Sr15  1  0.835  0.500  0.500  1.0
  Sr  Sr16  1  0.165  0.500  0.835  1.0
  Sr  Sr17  1  0.500  0.500  0.165  1.0
  Sr  Sr18  1  0.165  0.835  0.500  1.0
  Sr  Sr19  1  0.000  0.000  0.000  1.0
  Sr  Sr20  1  0.129  0.129  0.613  1.0
  Sr  Sr21  1  0.500  0.165  0.500  1.0
  Al  Al22  1  0.084  0.305  0.305  1.0
  Al  Al23  1  0.695  0.695  0.916  1.0
  Al  Al24  1  0.305  0.305  0.084  1.0
  Al  Al25  1  0.695  0.916  0.695  1.0
  Al  Al26  1  0.305  0.084  0.305  1.0
  Al  Al27  1  0.916  0.695  0.695  1.0
  Al  Al28  1  0.305  0.305  0.305  1.0
  Al  Al29  1  0.695  0.695  0.695  1.0
  Sn  Sn30  1  0.217  0.783  0.783  1.0
  Sn  Sn31  1  0.217  0.217  0.783  1.0
  Sn  Sn32  1  0.217  0.783  0.217  1.0
  Sn  Sn33  1  0.783  0.783  0.217  1.0
  Sn  Sn34  1  0.783  0.217  0.783  1.0
  Sn  Sn35  1  0.783  0.217  0.217  1.0
[/CIF]
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The material described by Sr11Al4Sn3 crystallizes in the cubic Fm-3m space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to three equivalent Al(1) and three equivalent Sn(1) atoms. In the second Sr site, Sr(2) is bonded in a distorted square co-planar geometry to one Sr(3), two equivalent Al(1), and two equivalent Sn(1) atoms. In the third Sr site, Sr(3) is bonded in a cuboctahedral geometry to twelve equivalent Sr(2) atoms. In the fourth Sr site, Sr(4) is bonded in a distorted octahedral geometry to six equivalent Sn(1) atoms. Al(1) is bonded in a 9-coordinate geometry to three equivalent Sr(1), three equivalent Sr(2), and three equivalent Al(1) atoms. Sn(1) is bonded in a 9-coordinate geometry to one Sr(4), four equivalent Sr(1), and four equivalent Sr(2) atoms. is represented by the CIF file [CIF]
data_Sr11Al4Sn3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.327
_cell_length_b   12.327
_cell_length_c   12.327
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   1324.425
_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  0.129  0.129  0.129  1.0
  Sr  Sr1  1  0.500  0.500  0.835  1.0
  Sr  Sr2  1  0.500  0.165  0.835  1.0
  Sr  Sr3  1  0.871  0.387  0.871  1.0
  Sr  Sr4  1  0.129  0.613  0.129  1.0
  Sr  Sr5  1  0.500  0.835  0.500  1.0
  Sr  Sr6  1  0.165  0.500  0.500  1.0
  Sr  Sr7  1  0.871  0.871  0.387  1.0
  Sr  Sr8  1  0.500  0.835  0.165  1.0
  Sr  Sr9  1  0.613  0.129  0.129  1.0
  Sr  Sr10  1  0.835  0.165  0.500  1.0
  Sr  Sr11  1  0.871  0.871  0.871  1.0
  Sr  Sr12  1  0.387  0.871  0.871  1.0
  Sr  Sr13  1  0.835  0.500  0.165  1.0
  Sr  Sr14  1  0.500  0.500  0.500  1.0
  Sr  Sr15  1  0.835  0.500  0.500  1.0
  Sr  Sr16  1  0.165  0.500  0.835  1.0
  Sr  Sr17  1  0.500  0.500  0.165  1.0
  Sr  Sr18  1  0.165  0.835  0.500  1.0
  Sr  Sr19  1  0.000  0.000  0.000  1.0
  Sr  Sr20  1  0.129  0.129  0.613  1.0
  Sr  Sr21  1  0.500  0.165  0.500  1.0
  Al  Al22  1  0.084  0.305  0.305  1.0
  Al  Al23  1  0.695  0.695  0.916  1.0
  Al  Al24  1  0.305  0.305  0.084  1.0
  Al  Al25  1  0.695  0.916  0.695  1.0
  Al  Al26  1  0.305  0.084  0.305  1.0
  Al  Al27  1  0.916  0.695  0.695  1.0
  Al  Al28  1  0.305  0.305  0.305  1.0
  Al  Al29  1  0.695  0.695  0.695  1.0
  Sn  Sn30  1  0.217  0.783  0.783  1.0
  Sn  Sn31  1  0.217  0.217  0.783  1.0
  Sn  Sn32  1  0.217  0.783  0.217  1.0
  Sn  Sn33  1  0.783  0.783  0.217  1.0
  Sn  Sn34  1  0.783  0.217  0.783  1.0
  Sn  Sn35  1  0.783  0.217  0.217  1.0
[/CIF]
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