The structure described by Mg3Pb is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a distorted square co-planar geometry to four equivalent Pb(1) atoms. In the second Mg site, Mg(2) is bonded to four equivalent Pb(1) atoms to form a mixture of distorted corner and edge-sharing MgPb4 cuboctahedra. Pb(1) is bonded to four equivalent Mg(1) and eight equivalent Mg(2) atoms to form a mixture of face, corner, and edge-sharing PbMg12 cuboctahedra. is represented by the CIF file [CIF]
data_Mg3Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.587
_cell_length_b   5.587
_cell_length_c   5.587
_cell_angle_alpha   132.213
_cell_angle_beta   132.213
_cell_angle_gamma   69.892
_symmetry_Int_Tables_number   1
_cell_volume   93.824
_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
  Mg  Mg1  1  0.750  0.250  0.500  1.0
  Mg  Mg2  1  0.250  0.750  0.500  1.0
  Pb  Pb3  1  0.000  0.000  0.000  1.0
[/CIF]
.
The structure described by Mg3Pb is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a distorted square co-planar geometry to four equivalent Pb(1) atoms. In the second Mg site, Mg(2) is bonded to four equivalent Pb(1) atoms to form a mixture of distorted corner and edge-sharing MgPb4 cuboctahedra. Pb(1) is bonded to four equivalent Mg(1) and eight equivalent Mg(2) atoms to form a mixture of face, corner, and edge-sharing PbMg12 cuboctahedra. is represented by the CIF file [CIF]
data_Mg3Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.587
_cell_length_b   5.587
_cell_length_c   5.587
_cell_angle_alpha   132.213
_cell_angle_beta   132.213
_cell_angle_gamma   69.892
_symmetry_Int_Tables_number   1
_cell_volume   93.824
_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
  Mg  Mg1  1  0.750  0.250  0.500  1.0
  Mg  Mg2  1  0.250  0.750  0.500  1.0
  Pb  Pb3  1  0.000  0.000  0.000  1.0
[/CIF]
.