data_Al2TlPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.07
_cell_length_b   7.07
_cell_length_c   7.07
_cell_angle_alpha   155.73
_cell_angle_beta   145.42
_cell_angle_gamma   42.7
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al2TlPt
_chemical_formula_sum   'Al2 Tl1 Pt1'
_cell_volume   82.34
_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  0.0  0.0  0.14  1.0
  Al  Al1  1  0.49  0.0  0.27  1.0
  Tl  Tl3  1  0.0  0.1  0.61  1.0
  Pt  Pt2  1  0.0  0.0  0.33  1.0

data_Al2TlPt
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.97
_cell_length_b   4.2
_cell_length_c   7.07
_cell_angle_alpha   107.29
_cell_angle_beta   102.13
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al2TlPt
_chemical_formula_sum   'Al2 Tl1 Pt1'
_cell_volume   82.34
_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  0.0  0.14  0.14  1.0
  Al  Al1  1  0.0  0.27  0.78  1.0
  Tl  Tl2  1  0.9  0.51  0.51  1.0
  Pt  Pt3  1  0.0  0.33  0.33  1.0

Al Al Tl Pt
PtTlAl2 crystallizes in the triclinic P1 space group. Pt(1) is bonded in a distorted linear geometry to one Tl(1) and one Al(1) atom. The Pt(1)-Tl(1) bond length is 1.32 Å. The Pt(1)-Al(1) bond length is 1.35 Å. Tl(1) is bonded in a single-bond geometry to one Pt(1) and two equivalent Al(2) atoms. There is one shorter (2.41 Å) and one longer (3.19 Å) Tl(1)-Al(2) bond length. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a single-bond geometry to one Pt(1) and one Al(2) atom. The Al(1)-Al(2) bond length is 2.75 Å. In the second Al site, Al(2) is bonded to two equivalent Tl(1), one Al(1), and two equivalent Al(2) atoms to form distorted corner-sharing AlAl3Tl2 square pyramids. Both Al(2)-Al(2) bond lengths are 2.97 Å.