data_CoPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.17
_cell_length_b   4.17
_cell_length_c   4.91
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CoPt
_chemical_formula_sum   'Co2 Pt2'
_cell_volume   74.11
_cell_formula_units_Z   2
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
  Co  Co0  1  0.09  0.2  0.68  1.0
  Co  Co1  1  0.0  0.41  0.23  1.0
  Pt  Pt2  1  0.09  0.2  0.23  1.0
  Pt  Pt3  1  0.0  0.41  0.68  1.0

data_CoPt
_symmetry_space_group_name_H-M   P-1
_cell_length_a   4.17
_cell_length_b   4.17
_cell_length_c   4.91
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   CoPt
_chemical_formula_sum   'Co2 Pt2'
_cell_volume   74.11
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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
  Co  Co0  2  0.04  0.9  0.23  1.0
  Pt  Pt1  2  0.04  0.9  0.77  1.0

Co Co Pt Pt
Co Co Pt Pt 0 3 o o o 1 2 o o o 
CoPt crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two CoPt clusters. Co(1) is bonded in a distorted single-bond geometry to one Pt(1) atom. The Co(1)-Pt(1) bond length is 1.08 Å. Pt(1) is bonded in a distorted single-bond geometry to one Co(1) atom.