The structure described by Pt3Al crystallizes in the tetragonal P4/mbm space group. There are three inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Al(1) atoms. In the second Pt site, Pt(2) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Al(1) atoms. In the third Pt site, Pt(3) is bonded in a distorted water-like geometry to two equivalent Al(1) atoms. Al(1) is bonded in a 10-coordinate geometry to two equivalent Pt(3), four equivalent Pt(1), and four equivalent Pt(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_AlPt3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.482
_cell_length_b   5.482
_cell_length_c   7.857
_cell_angle_alpha   89.999
_cell_angle_beta   89.999
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   236.141
_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
  Al  Al0  1  0.500  0.000  0.236  1.0
  Al  Al1  1  1.000  0.500  0.764  1.0
  Al  Al2  1  0.000  0.500  0.236  1.0
  Al  Al3  1  0.500  0.000  0.764  1.0
  Pt  Pt4  1  0.237  0.737  0.000  1.0
  Pt  Pt5  1  0.000  0.000  0.254  1.0
  Pt  Pt6  1  0.690  0.190  0.500  1.0
  Pt  Pt7  1  0.190  0.310  0.500  1.0
  Pt  Pt8  1  0.763  0.263  0.000  1.0
  Pt  Pt9  1  0.810  0.690  0.500  1.0
  Pt  Pt10  1  0.310  0.810  0.500  1.0
  Pt  Pt11  1  0.737  0.763  0.000  1.0
  Pt  Pt12  1  0.500  0.500  0.254  1.0
  Pt  Pt13  1  1.000  0.000  0.746  1.0
  Pt  Pt14  1  0.263  0.237  0.000  1.0
  Pt  Pt15  1  0.500  0.500  0.746  1.0
[/CIF]
.
The structure described by Pt3Al crystallizes in the tetragonal P4/mbm space group. There are three inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Al(1) atoms. In the second Pt site, Pt(2) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Al(1) atoms. In the third Pt site, Pt(3) is bonded in a distorted water-like geometry to two equivalent Al(1) atoms. Al(1) is bonded in a 10-coordinate geometry to two equivalent Pt(3), four equivalent Pt(1), and four equivalent Pt(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_AlPt3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.482
_cell_length_b   5.482
_cell_length_c   7.857
_cell_angle_alpha   89.999
_cell_angle_beta   89.999
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   236.141
_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
  Al  Al0  1  0.500  0.000  0.236  1.0
  Al  Al1  1  1.000  0.500  0.764  1.0
  Al  Al2  1  0.000  0.500  0.236  1.0
  Al  Al3  1  0.500  0.000  0.764  1.0
  Pt  Pt4  1  0.237  0.737  0.000  1.0
  Pt  Pt5  1  0.000  0.000  0.254  1.0
  Pt  Pt6  1  0.690  0.190  0.500  1.0
  Pt  Pt7  1  0.190  0.310  0.500  1.0
  Pt  Pt8  1  0.763  0.263  0.000  1.0
  Pt  Pt9  1  0.810  0.690  0.500  1.0
  Pt  Pt10  1  0.310  0.810  0.500  1.0
  Pt  Pt11  1  0.737  0.763  0.000  1.0
  Pt  Pt12  1  0.500  0.500  0.254  1.0
  Pt  Pt13  1  1.000  0.000  0.746  1.0
  Pt  Pt14  1  0.263  0.237  0.000  1.0
  Pt  Pt15  1  0.500  0.500  0.746  1.0
[/CIF]
.