The material described by MgPt2 crystallizes in the hexagonal P-62m space group. Mg(1) is bonded to three equivalent Pt(1) and six equivalent Pt(2) atoms to form a mixture of distorted corner and face-sharing MgPt9 cuboctahedra. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a distorted hexagonal planar geometry to six equivalent Mg(1) atoms. In the second Pt site, Pt(2) is bonded to four equivalent Mg(1) atoms to form a mixture of distorted corner and edge-sharing PtMg4 cuboctahedra. is represented by the CIF file [CIF]
data_MgPt2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.859
_cell_length_b   4.859
_cell_length_c   4.529
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   92.590
_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  0.333  0.667  0.500  1.0
  Mg  Mg1  1  0.667  0.333  0.500  1.0
  Pt  Pt2  1  0.000  0.000  0.500  1.0
  Pt  Pt3  1  0.000  0.334  0.000  1.0
  Pt  Pt4  1  0.334  0.000  0.000  1.0
  Pt  Pt5  1  0.666  0.666  0.000  1.0
[/CIF]
.
The material described by MgPt2 crystallizes in the hexagonal P-62m space group. Mg(1) is bonded to three equivalent Pt(1) and six equivalent Pt(2) atoms to form a mixture of distorted corner and face-sharing MgPt9 cuboctahedra. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a distorted hexagonal planar geometry to six equivalent Mg(1) atoms. In the second Pt site, Pt(2) is bonded to four equivalent Mg(1) atoms to form a mixture of distorted corner and edge-sharing PtMg4 cuboctahedra. is represented by the CIF file [CIF]
data_MgPt2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.859
_cell_length_b   4.859
_cell_length_c   4.529
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   92.590
_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  0.333  0.667  0.500  1.0
  Mg  Mg1  1  0.667  0.333  0.500  1.0
  Pt  Pt2  1  0.000  0.000  0.500  1.0
  Pt  Pt3  1  0.000  0.334  0.000  1.0
  Pt  Pt4  1  0.334  0.000  0.000  1.0
  Pt  Pt5  1  0.666  0.666  0.000  1.0
[/CIF]
.