The compound described by MgPt5 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded in a 8-coordinate geometry to two equivalent Pt(3), two equivalent Pt(4), two equivalent Pt(5), and four equivalent Pt(2) atoms. There are five inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), and four equivalent Pt(4) atoms to form distorted PtPt10 cuboctahedra that share corners with two equivalent Pt(3)Mg2Pt10 cuboctahedra, corners with six equivalent Pt(1)Pt10 cuboctahedra, edges with two equivalent Pt(1)Pt10 cuboctahedra, edges with five equivalent Pt(3)Mg2Pt10 cuboctahedra, and faces with two equivalent Pt(1)Pt10 cuboctahedra. In the second Pt site, Pt(2) is bonded in a 4-coordinate geometry to four equivalent Mg(1), two equivalent Pt(1), and two equivalent Pt(3) atoms. In the third Pt site, Pt(3) is bonded to two equivalent Mg(1), two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), and four equivalent Pt(5) atoms to form PtMg2Pt10 cuboctahedra that share corners with two equivalent Pt(1)Pt10 cuboctahedra, corners with six equivalent Pt(3)Mg2Pt10 cuboctahedra, edges with five equivalent Pt(1)Pt10 cuboctahedra, and faces with four equivalent Pt(3)Mg2Pt10 cuboctahedra. In the fourth Pt site, Pt(4) is bonded in a 2-coordinate geometry to two equivalent Mg(1) and four equivalent Pt(1) atoms. In the fifth Pt site, Pt(5) is bonded in a 2-coordinate geometry to two equivalent Mg(1) and four equivalent Pt(3) atoms. is represented by the CIF file [CIF]
data_MgPt5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.284
_cell_length_b   7.284
_cell_length_c   4.673
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   158.068
_symmetry_Int_Tables_number   1
_cell_volume   92.608
_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  0.793  0.207  0.500  1.0
  Pt  Pt1  1  0.982  0.018  0.000  1.0
  Pt  Pt2  1  0.318  0.682  0.000  1.0
  Pt  Pt3  1  0.651  0.349  0.000  1.0
  Pt  Pt4  1  0.456  0.544  0.500  1.0
  Pt  Pt5  1  0.134  0.866  0.500  1.0
[/CIF]
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The compound described by MgPt5 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded in a 8-coordinate geometry to two equivalent Pt(3), two equivalent Pt(4), two equivalent Pt(5), and four equivalent Pt(2) atoms. There are five inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), and four equivalent Pt(4) atoms to form distorted PtPt10 cuboctahedra that share corners with two equivalent Pt(3)Mg2Pt10 cuboctahedra, corners with six equivalent Pt(1)Pt10 cuboctahedra, edges with two equivalent Pt(1)Pt10 cuboctahedra, edges with five equivalent Pt(3)Mg2Pt10 cuboctahedra, and faces with two equivalent Pt(1)Pt10 cuboctahedra. In the second Pt site, Pt(2) is bonded in a 4-coordinate geometry to four equivalent Mg(1), two equivalent Pt(1), and two equivalent Pt(3) atoms. In the third Pt site, Pt(3) is bonded to two equivalent Mg(1), two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), and four equivalent Pt(5) atoms to form PtMg2Pt10 cuboctahedra that share corners with two equivalent Pt(1)Pt10 cuboctahedra, corners with six equivalent Pt(3)Mg2Pt10 cuboctahedra, edges with five equivalent Pt(1)Pt10 cuboctahedra, and faces with four equivalent Pt(3)Mg2Pt10 cuboctahedra. In the fourth Pt site, Pt(4) is bonded in a 2-coordinate geometry to two equivalent Mg(1) and four equivalent Pt(1) atoms. In the fifth Pt site, Pt(5) is bonded in a 2-coordinate geometry to two equivalent Mg(1) and four equivalent Pt(3) atoms. is represented by the CIF file [CIF]
data_MgPt5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.284
_cell_length_b   7.284
_cell_length_c   4.673
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   158.068
_symmetry_Int_Tables_number   1
_cell_volume   92.608
_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  0.793  0.207  0.500  1.0
  Pt  Pt1  1  0.982  0.018  0.000  1.0
  Pt  Pt2  1  0.318  0.682  0.000  1.0
  Pt  Pt3  1  0.651  0.349  0.000  1.0
  Pt  Pt4  1  0.456  0.544  0.500  1.0
  Pt  Pt5  1  0.134  0.866  0.500  1.0
[/CIF]
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