data_Al2CoPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.32
_cell_length_b   4.32
_cell_length_c   2.89
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   98.41
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al2CoPt
_chemical_formula_sum   'Al2 Co1 Pt1'
_cell_volume   53.27
_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  0.41  0.37  0.44  1.0
  Al  Al1  1  0.41  0.63  0.44  1.0
  Co  Co2  1  0.0  0.0  0.0  1.0
  Pt  Pt3  1  0.82  0.0  0.0  1.0

data_Al2CoPt
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.89
_cell_length_b   4.32
_cell_length_c   4.32
_cell_angle_alpha   98.41
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al2CoPt
_chemical_formula_sum   'Al2 Co1 Pt1'
_cell_volume   53.27
_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  0.44  0.41  0.37  1.0
  Al  Al1  1  0.44  0.41  0.63  1.0
  Co  Co2  1  0.0  0.0  0.0  1.0
  Pt  Pt3  1  0.0  0.82  0.0  1.0

Al Al Co Pt
CoPtAl2 crystallizes in the triclinic P1 space group. Co(1) is bonded in a single-bond geometry to one Pt(1), two equivalent Al(1), and two equivalent Al(2) atoms. The Co(1)-Pt(1) bond length is 0.77 Å. There is one shorter (2.54 Å) and one longer (2.72 Å) Co(1)-Al(1) bond length. There is one shorter (2.85 Å) and one longer (3.00 Å) Co(1)-Al(2) bond length. Pt(1) is bonded in a single-bond geometry to one Co(1), two equivalent Al(1), and two equivalent Al(2) atoms. There is one shorter (2.85 Å) and one longer (3.00 Å) Pt(1)-Al(1) bond length. There is one shorter (2.54 Å) and one longer (2.72 Å) Pt(1)-Al(2) bond length. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded in a 5-coordinate geometry to two equivalent Co(1), two equivalent Pt(1), and one Al(2) atom. The Al(1)-Al(2) bond length is 1.16 Å. In the second Al site, Al(2) is bonded in a 5-coordinate geometry to two equivalent Co(1), two equivalent Pt(1), and one Al(1) atom.