The material structure described by SrSn3 is Parent of FeAs superconductors-derived structured and crystallizes in the trigonal R-3m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 12-coordinate geometry to three equivalent Sn(1) and nine equivalent Sn(2) atoms. In the second Sr site, Sr(2) is bonded to three equivalent Sn(2) and nine equivalent Sn(1) atoms to form a mixture of corner and face-sharing SrSn12 cuboctahedra. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to one Sr(1), three equivalent Sr(2), two equivalent Sn(1), and two equivalent Sn(2) atoms. In the second Sn site, Sn(2) is bonded in a 8-coordinate geometry to one Sr(2), three equivalent Sr(1), two equivalent Sn(1), and two equivalent Sn(2) atoms. is represented by the CIF file [CIF]
data_SrSn3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.192
_cell_length_b   12.192
_cell_length_c   12.192
_cell_angle_alpha   32.987
_cell_angle_beta   32.987
_cell_angle_gamma   32.987
_symmetry_Int_Tables_number   1
_cell_volume   478.047
_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
  Sr  Sr0  1  0.861  0.861  0.861  1.0
  Sr  Sr1  1  0.139  0.139  0.139  1.0
  Sr  Sr2  1  0.702  0.702  0.702  1.0
  Sr  Sr3  1  0.298  0.298  0.298  1.0
  Sn  Sn4  1  0.261  0.798  0.798  1.0
  Sn  Sn5  1  0.798  0.798  0.261  1.0
  Sn  Sn6  1  0.839  0.403  0.403  1.0
  Sn  Sn7  1  0.403  0.403  0.839  1.0
  Sn  Sn8  1  0.403  0.839  0.403  1.0
  Sn  Sn9  1  0.597  0.161  0.597  1.0
  Sn  Sn10  1  0.161  0.597  0.597  1.0
  Sn  Sn11  1  0.597  0.597  0.161  1.0
  Sn  Sn12  1  0.798  0.261  0.798  1.0
  Sn  Sn13  1  0.202  0.739  0.202  1.0
  Sn  Sn14  1  0.202  0.202  0.739  1.0
  Sn  Sn15  1  0.739  0.202  0.202  1.0
[/CIF]
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The material structure described by SrSn3 is Parent of FeAs superconductors-derived structured and crystallizes in the trigonal R-3m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 12-coordinate geometry to three equivalent Sn(1) and nine equivalent Sn(2) atoms. In the second Sr site, Sr(2) is bonded to three equivalent Sn(2) and nine equivalent Sn(1) atoms to form a mixture of corner and face-sharing SrSn12 cuboctahedra. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to one Sr(1), three equivalent Sr(2), two equivalent Sn(1), and two equivalent Sn(2) atoms. In the second Sn site, Sn(2) is bonded in a 8-coordinate geometry to one Sr(2), three equivalent Sr(1), two equivalent Sn(1), and two equivalent Sn(2) atoms. is represented by the CIF file [CIF]
data_SrSn3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.192
_cell_length_b   12.192
_cell_length_c   12.192
_cell_angle_alpha   32.987
_cell_angle_beta   32.987
_cell_angle_gamma   32.987
_symmetry_Int_Tables_number   1
_cell_volume   478.047
_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
  Sr  Sr0  1  0.861  0.861  0.861  1.0
  Sr  Sr1  1  0.139  0.139  0.139  1.0
  Sr  Sr2  1  0.702  0.702  0.702  1.0
  Sr  Sr3  1  0.298  0.298  0.298  1.0
  Sn  Sn4  1  0.261  0.798  0.798  1.0
  Sn  Sn5  1  0.798  0.798  0.261  1.0
  Sn  Sn6  1  0.839  0.403  0.403  1.0
  Sn  Sn7  1  0.403  0.403  0.839  1.0
  Sn  Sn8  1  0.403  0.839  0.403  1.0
  Sn  Sn9  1  0.597  0.161  0.597  1.0
  Sn  Sn10  1  0.161  0.597  0.597  1.0
  Sn  Sn11  1  0.597  0.597  0.161  1.0
  Sn  Sn12  1  0.798  0.261  0.798  1.0
  Sn  Sn13  1  0.202  0.739  0.202  1.0
  Sn  Sn14  1  0.202  0.202  0.739  1.0
  Sn  Sn15  1  0.739  0.202  0.202  1.0
[/CIF]
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