The structure described by Ir5Sn7 crystallizes in the tetragonal I4mm space group. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 7-coordinate geometry to one Sn(3), two equivalent Sn(2), and four equivalent Sn(1) atoms. In the second Ir site, Ir(2) is bonded in a square pyramidal geometry to one Sn(3) and four equivalent Sn(1) atoms. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 5-coordinate geometry to one Ir(2) and four equivalent Ir(1) atoms. In the second Sn site, Sn(2) is bonded to four equivalent Ir(1) atoms to form edge-sharing SnIr4 tetrahedra. In the third Sn site, Sn(3) is bonded in a 5-coordinate geometry to one Ir(2) and four equivalent Ir(1) atoms. is represented by the CIF file [CIF]
data_Sn7Ir5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.515
_cell_length_b   6.892
_cell_length_c   6.892
_cell_angle_alpha   77.093
_cell_angle_beta   61.796
_cell_angle_gamma   61.796
_symmetry_Int_Tables_number   1
_cell_volume   240.343
_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
  Sn  Sn0  1  0.724  0.000  0.570  1.0
  Sn  Sn1  1  0.294  0.430  0.000  1.0
  Sn  Sn2  1  0.724  0.570  0.000  1.0
  Sn  Sn3  1  0.294  0.000  0.430  1.0
  Sn  Sn4  1  0.417  0.500  0.500  1.0
  Sn  Sn5  1  0.903  0.000  0.000  1.0
  Sn  Sn6  1  0.917  0.500  0.500  1.0
  Ir  Ir7  1  0.933  0.245  0.245  1.0
  Ir  Ir8  1  0.178  0.755  0.245  1.0
  Ir  Ir9  1  0.178  0.245  0.755  1.0
  Ir  Ir10  1  0.422  0.755  0.755  1.0
  Ir  Ir11  1  0.503  0.000  0.000  1.0
[/CIF]
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The structure described by Ir5Sn7 crystallizes in the tetragonal I4mm space group. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 7-coordinate geometry to one Sn(3), two equivalent Sn(2), and four equivalent Sn(1) atoms. In the second Ir site, Ir(2) is bonded in a square pyramidal geometry to one Sn(3) and four equivalent Sn(1) atoms. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 5-coordinate geometry to one Ir(2) and four equivalent Ir(1) atoms. In the second Sn site, Sn(2) is bonded to four equivalent Ir(1) atoms to form edge-sharing SnIr4 tetrahedra. In the third Sn site, Sn(3) is bonded in a 5-coordinate geometry to one Ir(2) and four equivalent Ir(1) atoms. is represented by the CIF file [CIF]
data_Sn7Ir5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.515
_cell_length_b   6.892
_cell_length_c   6.892
_cell_angle_alpha   77.093
_cell_angle_beta   61.796
_cell_angle_gamma   61.796
_symmetry_Int_Tables_number   1
_cell_volume   240.343
_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
  Sn  Sn0  1  0.724  0.000  0.570  1.0
  Sn  Sn1  1  0.294  0.430  0.000  1.0
  Sn  Sn2  1  0.724  0.570  0.000  1.0
  Sn  Sn3  1  0.294  0.000  0.430  1.0
  Sn  Sn4  1  0.417  0.500  0.500  1.0
  Sn  Sn5  1  0.903  0.000  0.000  1.0
  Sn  Sn6  1  0.917  0.500  0.500  1.0
  Ir  Ir7  1  0.933  0.245  0.245  1.0
  Ir  Ir8  1  0.178  0.755  0.245  1.0
  Ir  Ir9  1  0.178  0.245  0.755  1.0
  Ir  Ir10  1  0.422  0.755  0.755  1.0
  Ir  Ir11  1  0.503  0.000  0.000  1.0
[/CIF]
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