The material structure described by Mg5(Pt5Si8)2 crystallizes in the cubic F-43m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 6-coordinate geometry to three equivalent Pt(1) and three equivalent Pt(2) atoms. In the second Mg site, Mg(2) is bonded in a tetrahedral geometry to four equivalent Pt(1) atoms. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 7-coordinate geometry to one Mg(2), three equivalent Mg(1), and three equivalent Si(1) atoms. In the second Pt site, Pt(2) is bonded in a 8-coordinate geometry to two equivalent Mg(1), two equivalent Si(2), and four equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 6-coordinate geometry to one Pt(1), two equivalent Pt(2), and three equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a distorted trigonal planar geometry to three equivalent Pt(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg5(Si8Pt5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.912
_cell_length_b   8.912
_cell_length_c   8.912
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   500.571
_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  0.344  0.344  0.344  1.0
  Mg  Mg1  1  0.967  0.344  0.344  1.0
  Mg  Mg2  1  0.344  0.967  0.344  1.0
  Mg  Mg3  1  0.344  0.344  0.967  1.0
  Mg  Mg4  1  1.000  1.000  1.000  1.0
  Si  Si5  1  0.677  0.956  0.956  1.0
  Si  Si6  1  0.572  0.572  0.284  1.0
  Si  Si7  1  0.572  0.284  0.572  1.0
  Si  Si8  1  0.284  0.572  0.572  1.0
  Si  Si9  1  0.572  0.572  0.572  1.0
  Si  Si10  1  0.411  0.956  0.956  1.0
  Si  Si11  1  0.411  0.956  0.677  1.0
  Si  Si12  1  0.411  0.677  0.956  1.0
  Si  Si13  1  0.956  0.956  0.411  1.0
  Si  Si14  1  0.956  0.411  0.956  1.0
  Si  Si15  1  0.956  0.956  0.677  1.0
  Si  Si16  1  0.677  0.956  0.411  1.0
  Si  Si17  1  0.956  0.677  0.956  1.0
  Si  Si18  1  0.956  0.411  0.677  1.0
  Si  Si19  1  0.677  0.411  0.956  1.0
  Si  Si20  1  0.956  0.677  0.411  1.0
  Pt  Pt21  1  0.127  0.127  0.127  1.0
  Pt  Pt22  1  0.732  0.732  0.268  1.0
  Pt  Pt23  1  0.268  0.268  0.732  1.0
  Pt  Pt24  1  0.732  0.268  0.732  1.0
  Pt  Pt25  1  0.268  0.732  0.732  1.0
  Pt  Pt26  1  0.732  0.268  0.268  1.0
  Pt  Pt27  1  0.268  0.732  0.268  1.0
  Pt  Pt28  1  0.127  0.127  0.620  1.0
  Pt  Pt29  1  0.127  0.620  0.127  1.0
  Pt  Pt30  1  0.620  0.127  0.127  1.0
[/CIF]
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The material structure described by Mg5(Pt5Si8)2 crystallizes in the cubic F-43m space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a 6-coordinate geometry to three equivalent Pt(1) and three equivalent Pt(2) atoms. In the second Mg site, Mg(2) is bonded in a tetrahedral geometry to four equivalent Pt(1) atoms. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 7-coordinate geometry to one Mg(2), three equivalent Mg(1), and three equivalent Si(1) atoms. In the second Pt site, Pt(2) is bonded in a 8-coordinate geometry to two equivalent Mg(1), two equivalent Si(2), and four equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 6-coordinate geometry to one Pt(1), two equivalent Pt(2), and three equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a distorted trigonal planar geometry to three equivalent Pt(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg5(Si8Pt5)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.912
_cell_length_b   8.912
_cell_length_c   8.912
_cell_angle_alpha   60.000
_cell_angle_beta   60.000
_cell_angle_gamma   60.000
_symmetry_Int_Tables_number   1
_cell_volume   500.571
_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  0.344  0.344  0.344  1.0
  Mg  Mg1  1  0.967  0.344  0.344  1.0
  Mg  Mg2  1  0.344  0.967  0.344  1.0
  Mg  Mg3  1  0.344  0.344  0.967  1.0
  Mg  Mg4  1  1.000  1.000  1.000  1.0
  Si  Si5  1  0.677  0.956  0.956  1.0
  Si  Si6  1  0.572  0.572  0.284  1.0
  Si  Si7  1  0.572  0.284  0.572  1.0
  Si  Si8  1  0.284  0.572  0.572  1.0
  Si  Si9  1  0.572  0.572  0.572  1.0
  Si  Si10  1  0.411  0.956  0.956  1.0
  Si  Si11  1  0.411  0.956  0.677  1.0
  Si  Si12  1  0.411  0.677  0.956  1.0
  Si  Si13  1  0.956  0.956  0.411  1.0
  Si  Si14  1  0.956  0.411  0.956  1.0
  Si  Si15  1  0.956  0.956  0.677  1.0
  Si  Si16  1  0.677  0.956  0.411  1.0
  Si  Si17  1  0.956  0.677  0.956  1.0
  Si  Si18  1  0.956  0.411  0.677  1.0
  Si  Si19  1  0.677  0.411  0.956  1.0
  Si  Si20  1  0.956  0.677  0.411  1.0
  Pt  Pt21  1  0.127  0.127  0.127  1.0
  Pt  Pt22  1  0.732  0.732  0.268  1.0
  Pt  Pt23  1  0.268  0.268  0.732  1.0
  Pt  Pt24  1  0.732  0.268  0.732  1.0
  Pt  Pt25  1  0.268  0.732  0.732  1.0
  Pt  Pt26  1  0.732  0.268  0.268  1.0
  Pt  Pt27  1  0.268  0.732  0.268  1.0
  Pt  Pt28  1  0.127  0.127  0.620  1.0
  Pt  Pt29  1  0.127  0.620  0.127  1.0
  Pt  Pt30  1  0.620  0.127  0.127  1.0
[/CIF]
.