The compound described by Sr3(AlSn)2 crystallizes in the orthorhombic Immm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to two equivalent Al(1) and five equivalent Sn(1) atoms. In the second Sr site, Sr(2) is bonded to eight equivalent Al(1) and four equivalent Sn(1) atoms to form a mixture of edge and face-sharing SrAl8Sn4 cuboctahedra. Al(1) is bonded in a 9-coordinate geometry to two equivalent Sr(1), four equivalent Sr(2), one Al(1), and two equivalent Sn(1) atoms. Sn(1) is bonded in a 9-coordinate geometry to two equivalent Sr(2), five equivalent Sr(1), and two equivalent Al(1) atoms. is represented by the CIF card [CIF]
data_Sr3(AlSn)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.492
_cell_length_b   4.987
_cell_length_c   10.522
_cell_angle_alpha   103.689
_cell_angle_beta   102.345
_cell_angle_gamma   89.991
_symmetry_Int_Tables_number   1
_cell_volume   223.411
_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
  Sr  Sr0  1  0.183  0.183  0.365  1.0
  Sr  Sr1  1  0.817  0.817  0.635  1.0
  Sr  Sr2  1  0.500  0.000  0.000  1.0
  Al  Al3  1  0.937  0.436  0.873  1.0
  Al  Al4  1  0.063  0.564  0.127  1.0
  Sn  Sn5  1  0.359  0.360  0.718  1.0
  Sn  Sn6  1  0.641  0.640  0.282  1.0
[/CIF]
.
The compound described by Sr3(AlSn)2 crystallizes in the orthorhombic Immm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to two equivalent Al(1) and five equivalent Sn(1) atoms. In the second Sr site, Sr(2) is bonded to eight equivalent Al(1) and four equivalent Sn(1) atoms to form a mixture of edge and face-sharing SrAl8Sn4 cuboctahedra. Al(1) is bonded in a 9-coordinate geometry to two equivalent Sr(1), four equivalent Sr(2), one Al(1), and two equivalent Sn(1) atoms. Sn(1) is bonded in a 9-coordinate geometry to two equivalent Sr(2), five equivalent Sr(1), and two equivalent Al(1) atoms. is represented by the CIF card [CIF]
data_Sr3(AlSn)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.492
_cell_length_b   4.987
_cell_length_c   10.522
_cell_angle_alpha   103.689
_cell_angle_beta   102.345
_cell_angle_gamma   89.991
_symmetry_Int_Tables_number   1
_cell_volume   223.411
_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
  Sr  Sr0  1  0.183  0.183  0.365  1.0
  Sr  Sr1  1  0.817  0.817  0.635  1.0
  Sr  Sr2  1  0.500  0.000  0.000  1.0
  Al  Al3  1  0.937  0.436  0.873  1.0
  Al  Al4  1  0.063  0.564  0.127  1.0
  Sn  Sn5  1  0.359  0.360  0.718  1.0
  Sn  Sn6  1  0.641  0.640  0.282  1.0
[/CIF]
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