The material described by MgPt5 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one Pt(3), two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(4), and three equivalent Pt(5) atoms to form distorted MgPt10 cuboctahedra that share corners with two equivalent Pt(1)Mg2Pt10 cuboctahedra, corners with two equivalent Pt(5)Mg3Pt2 cuboctahedra, corners with four equivalent Mg(1)Pt10 cuboctahedra,  an edgeedge with one Pt(5)Mg3Pt2 cuboctahedra, edges with four equivalent Pt(1)Mg2Pt10 cuboctahedra, faces with two equivalent Mg(1)Pt10 cuboctahedra, and faces with three equivalent Pt(1)Mg2Pt10 cuboctahedra. There are five inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to two equivalent Mg(1), one Pt(4), two equivalent Pt(1), two equivalent Pt(3), two equivalent Pt(5), and three equivalent Pt(2) atoms to form distorted PtMg2Pt10 cuboctahedra that share corners with two equivalent Mg(1)Pt10 cuboctahedra, corners with four equivalent Pt(5)Mg3Pt2 cuboctahedra, corners with six equivalent Pt(1)Mg2Pt10 cuboctahedra, edges with three equivalent Pt(5)Mg3Pt2 cuboctahedra, edges with four equivalent Mg(1)Pt10 cuboctahedra, faces with two equivalent Pt(1)Mg2Pt10 cuboctahedra, and faces with three equivalent Mg(1)Pt10 cuboctahedra. In the second Pt site, Pt(2) is bonded in a 2-coordinate geometry to two equivalent Mg(1) and three equivalent Pt(1) atoms. In the third Pt site, Pt(3) is bonded in a distorted single-bond geometry to one Mg(1) and two equivalent Pt(1) atoms. In the fourth Pt site, Pt(4) is bonded in a 2-coordinate geometry to two equivalent Mg(1) and one Pt(1) atom. In the fifth Pt site, Pt(5) is bonded to three equivalent Mg(1) and two equivalent Pt(1) atoms to form distorted PtMg3Pt2 cuboctahedra that share corners with two equivalent Mg(1)Pt10 cuboctahedra, corners with four equivalent Pt(1)Mg2Pt10 cuboctahedra, corners with four equivalent Pt(5)Mg3Pt2 cuboctahedra,  an edgeedge with one Mg(1)Pt10 cuboctahedra, edges with two equivalent Pt(5)Mg3Pt2 cuboctahedra, and edges with three equivalent Pt(1)Mg2Pt10 cuboctahedra. is represented by the CIF card [CIF]
data_MgPt5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.771
_cell_length_b   5.372
_cell_length_c   6.677
_cell_angle_alpha   73.971
_cell_angle_beta   89.885
_cell_angle_gamma   104.830
_symmetry_Int_Tables_number   1
_cell_volume   92.038
_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  0.389  0.778  0.720  1.0
  Pt  Pt1  1  0.995  0.997  0.003  1.0
  Pt  Pt2  1  0.733  0.457  0.041  1.0
  Pt  Pt3  1  0.331  0.666  0.334  1.0
  Pt  Pt4  1  0.056  0.106  0.397  1.0
  Pt  Pt5  1  0.664  0.329  0.672  1.0
[/CIF]
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The material described by MgPt5 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one Pt(3), two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(4), and three equivalent Pt(5) atoms to form distorted MgPt10 cuboctahedra that share corners with two equivalent Pt(1)Mg2Pt10 cuboctahedra, corners with two equivalent Pt(5)Mg3Pt2 cuboctahedra, corners with four equivalent Mg(1)Pt10 cuboctahedra,  an edgeedge with one Pt(5)Mg3Pt2 cuboctahedra, edges with four equivalent Pt(1)Mg2Pt10 cuboctahedra, faces with two equivalent Mg(1)Pt10 cuboctahedra, and faces with three equivalent Pt(1)Mg2Pt10 cuboctahedra. There are five inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to two equivalent Mg(1), one Pt(4), two equivalent Pt(1), two equivalent Pt(3), two equivalent Pt(5), and three equivalent Pt(2) atoms to form distorted PtMg2Pt10 cuboctahedra that share corners with two equivalent Mg(1)Pt10 cuboctahedra, corners with four equivalent Pt(5)Mg3Pt2 cuboctahedra, corners with six equivalent Pt(1)Mg2Pt10 cuboctahedra, edges with three equivalent Pt(5)Mg3Pt2 cuboctahedra, edges with four equivalent Mg(1)Pt10 cuboctahedra, faces with two equivalent Pt(1)Mg2Pt10 cuboctahedra, and faces with three equivalent Mg(1)Pt10 cuboctahedra. In the second Pt site, Pt(2) is bonded in a 2-coordinate geometry to two equivalent Mg(1) and three equivalent Pt(1) atoms. In the third Pt site, Pt(3) is bonded in a distorted single-bond geometry to one Mg(1) and two equivalent Pt(1) atoms. In the fourth Pt site, Pt(4) is bonded in a 2-coordinate geometry to two equivalent Mg(1) and one Pt(1) atom. In the fifth Pt site, Pt(5) is bonded to three equivalent Mg(1) and two equivalent Pt(1) atoms to form distorted PtMg3Pt2 cuboctahedra that share corners with two equivalent Mg(1)Pt10 cuboctahedra, corners with four equivalent Pt(1)Mg2Pt10 cuboctahedra, corners with four equivalent Pt(5)Mg3Pt2 cuboctahedra,  an edgeedge with one Mg(1)Pt10 cuboctahedra, edges with two equivalent Pt(5)Mg3Pt2 cuboctahedra, and edges with three equivalent Pt(1)Mg2Pt10 cuboctahedra. is represented by the CIF card [CIF]
data_MgPt5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.771
_cell_length_b   5.372
_cell_length_c   6.677
_cell_angle_alpha   73.971
_cell_angle_beta   89.885
_cell_angle_gamma   104.830
_symmetry_Int_Tables_number   1
_cell_volume   92.038
_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  0.389  0.778  0.720  1.0
  Pt  Pt1  1  0.995  0.997  0.003  1.0
  Pt  Pt2  1  0.733  0.457  0.041  1.0
  Pt  Pt3  1  0.331  0.666  0.334  1.0
  Pt  Pt4  1  0.056  0.106  0.397  1.0
  Pt  Pt5  1  0.664  0.329  0.672  1.0
[/CIF]
.