The crystal structure described by Al3Pt is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. Pt(1) is bonded to four equivalent Al(2) and eight equivalent Al(1) atoms to form PtAl12 cuboctahedra that share corners with four equivalent Pt(1)Al12 cuboctahedra, corners with eight equivalent Al(2)Al8Pt4 cuboctahedra, edges with eight equivalent Pt(1)Al12 cuboctahedra, edges with sixteen equivalent Al(1)Al8Pt4 cuboctahedra, faces with four equivalent Pt(1)Al12 cuboctahedra, faces with six equivalent Al(2)Al8Pt4 cuboctahedra, and faces with eight equivalent Al(1)Al8Pt4 cuboctahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to four equivalent Pt(1), four equivalent Al(1), and four equivalent Al(2) atoms to form distorted AlAl8Pt4 cuboctahedra that share corners with twelve equivalent Al(1)Al8Pt4 cuboctahedra, edges with eight equivalent Pt(1)Al12 cuboctahedra, edges with eight equivalent Al(1)Al8Pt4 cuboctahedra, edges with eight equivalent Al(2)Al8Pt4 cuboctahedra, faces with four equivalent Pt(1)Al12 cuboctahedra, faces with four equivalent Al(2)Al8Pt4 cuboctahedra, and faces with ten equivalent Al(1)Al8Pt4 cuboctahedra. In the second Al site, Al(2) is bonded to four equivalent Pt(1) and eight equivalent Al(1) atoms to form distorted AlAl8Pt4 cuboctahedra that share corners with four equivalent Al(2)Al8Pt4 cuboctahedra, corners with eight equivalent Pt(1)Al12 cuboctahedra, edges with eight equivalent Al(2)Al8Pt4 cuboctahedra, edges with sixteen equivalent Al(1)Al8Pt4 cuboctahedra, faces with four equivalent Al(2)Al8Pt4 cuboctahedra, faces with six equivalent Pt(1)Al12 cuboctahedra, and faces with eight equivalent Al(1)Al8Pt4 cuboctahedra. is represented by the CIF file [CIF]
data_Al3Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.841
_cell_length_b   4.841
_cell_length_c   4.841
_cell_angle_alpha   131.947
_cell_angle_beta   131.947
_cell_angle_gamma   70.313
_symmetry_Int_Tables_number   1
_cell_volume   61.507
_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
  Al  Al0  1  0.750  0.250  0.500  1.0
  Al  Al1  1  0.250  0.750  0.500  1.0
  Al  Al2  1  0.500  0.500  0.000  1.0
  Pt  Pt3  1  0.000  0.000  0.000  1.0
[/CIF]
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The crystal structure described by Al3Pt is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. Pt(1) is bonded to four equivalent Al(2) and eight equivalent Al(1) atoms to form PtAl12 cuboctahedra that share corners with four equivalent Pt(1)Al12 cuboctahedra, corners with eight equivalent Al(2)Al8Pt4 cuboctahedra, edges with eight equivalent Pt(1)Al12 cuboctahedra, edges with sixteen equivalent Al(1)Al8Pt4 cuboctahedra, faces with four equivalent Pt(1)Al12 cuboctahedra, faces with six equivalent Al(2)Al8Pt4 cuboctahedra, and faces with eight equivalent Al(1)Al8Pt4 cuboctahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to four equivalent Pt(1), four equivalent Al(1), and four equivalent Al(2) atoms to form distorted AlAl8Pt4 cuboctahedra that share corners with twelve equivalent Al(1)Al8Pt4 cuboctahedra, edges with eight equivalent Pt(1)Al12 cuboctahedra, edges with eight equivalent Al(1)Al8Pt4 cuboctahedra, edges with eight equivalent Al(2)Al8Pt4 cuboctahedra, faces with four equivalent Pt(1)Al12 cuboctahedra, faces with four equivalent Al(2)Al8Pt4 cuboctahedra, and faces with ten equivalent Al(1)Al8Pt4 cuboctahedra. In the second Al site, Al(2) is bonded to four equivalent Pt(1) and eight equivalent Al(1) atoms to form distorted AlAl8Pt4 cuboctahedra that share corners with four equivalent Al(2)Al8Pt4 cuboctahedra, corners with eight equivalent Pt(1)Al12 cuboctahedra, edges with eight equivalent Al(2)Al8Pt4 cuboctahedra, edges with sixteen equivalent Al(1)Al8Pt4 cuboctahedra, faces with four equivalent Al(2)Al8Pt4 cuboctahedra, faces with six equivalent Pt(1)Al12 cuboctahedra, and faces with eight equivalent Al(1)Al8Pt4 cuboctahedra. is represented by the CIF file [CIF]
data_Al3Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.841
_cell_length_b   4.841
_cell_length_c   4.841
_cell_angle_alpha   131.947
_cell_angle_beta   131.947
_cell_angle_gamma   70.313
_symmetry_Int_Tables_number   1
_cell_volume   61.507
_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
  Al  Al0  1  0.750  0.250  0.500  1.0
  Al  Al1  1  0.250  0.750  0.500  1.0
  Al  Al2  1  0.500  0.500  0.000  1.0
  Pt  Pt3  1  0.000  0.000  0.000  1.0
[/CIF]
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