The material described by MgPt5As crystallizes in the tetragonal P4/mmm space group. Mg(1) is bonded to four equivalent Pt(1) and eight equivalent Pt(2) atoms to form a mixture of corner and face-sharing MgPt12 cuboctahedra. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a distorted square co-planar geometry to four equivalent Mg(1) atoms. In the second Pt site, Pt(2) is bonded in a 4-coordinate geometry to two equivalent Mg(1) and two equivalent As(1) atoms. As(1) is bonded in a body-centered cubic geometry to eight equivalent Pt(2) atoms. is represented by the CIF file [CIF]
data_MgAsPt5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.950
_cell_length_b   3.950
_cell_length_c   7.127
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   111.200
_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
  Mg  Mg0  1  0.500  0.500  0.000  1.0
  As  As1  1  0.000  0.000  0.500  1.0
  Pt  Pt2  1  0.000  0.000  0.000  1.0
  Pt  Pt3  1  0.500  0.000  0.279  1.0
  Pt  Pt4  1  0.000  0.500  0.279  1.0
  Pt  Pt5  1  0.500  0.000  0.721  1.0
  Pt  Pt6  1  0.000  0.500  0.721  1.0
[/CIF]
.
The material described by MgPt5As crystallizes in the tetragonal P4/mmm space group. Mg(1) is bonded to four equivalent Pt(1) and eight equivalent Pt(2) atoms to form a mixture of corner and face-sharing MgPt12 cuboctahedra. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a distorted square co-planar geometry to four equivalent Mg(1) atoms. In the second Pt site, Pt(2) is bonded in a 4-coordinate geometry to two equivalent Mg(1) and two equivalent As(1) atoms. As(1) is bonded in a body-centered cubic geometry to eight equivalent Pt(2) atoms. is represented by the CIF file [CIF]
data_MgAsPt5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.950
_cell_length_b   3.950
_cell_length_c   7.127
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   111.200
_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
  Mg  Mg0  1  0.500  0.500  0.000  1.0
  As  As1  1  0.000  0.000  0.500  1.0
  Pt  Pt2  1  0.000  0.000  0.000  1.0
  Pt  Pt3  1  0.500  0.000  0.279  1.0
  Pt  Pt4  1  0.000  0.500  0.279  1.0
  Pt  Pt5  1  0.500  0.000  0.721  1.0
  Pt  Pt6  1  0.000  0.500  0.721  1.0
[/CIF]
.