data_MgPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.5
_cell_length_b   4.5
_cell_length_c   5.23
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgPt
_chemical_formula_sum   'Mg2 Pt2'
_cell_volume   91.66
_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
  Mg  Mg0  1  0.25  0.3  0.92  1.0
  Mg  Mg1  1  0.0  0.6  0.31  1.0
  Pt  Pt2  1  0.25  0.3  0.31  1.0
  Pt  Pt3  1  0.0  0.6  0.92  1.0

data_MgPt
_symmetry_space_group_name_H-M   P-1
_cell_length_a   4.5
_cell_length_b   4.5
_cell_length_c   5.23
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   MgPt
_chemical_formula_sum   'Mg2 Pt2'
_cell_volume   91.66
_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
  Mg  Mg0  2  0.12  0.85  0.81  1.0
  Pt  Pt1  2  0.12  0.85  0.19  1.0

Mg Mg Pt Pt
MgPt crystallizes in the triclinic P-1 space group. Mg(1) is bonded to five equivalent Pt(1) atoms to form a mixture of distorted corner and edge-sharing MgPt5 trigonal bipyramids. There are a spread of Mg(1)-Pt(1) bond distances ranging from 2.01-3.22 Å. Pt(1) is bonded to five equivalent Mg(1) atoms to form a mixture of distorted corner and edge-sharing PtMg5 trigonal bipyramids.