The compound described by MgPb5 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded in a 10-coordinate geometry to two equivalent Pb(3), two equivalent Pb(4), two equivalent Pb(5), and four equivalent Pb(2) atoms. There are five inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to two equivalent Pb(1), two equivalent Pb(2), two equivalent Pb(3), two equivalent Pb(5), and four equivalent Pb(4) atoms to form distorted PbPb12 cuboctahedra that share corners with six equivalent Pb(3)Mg2Pb10 cuboctahedra, corners with six equivalent Pb(2)Mg4Pb8 cuboctahedra, corners with six equivalent Pb(1)Pb12 cuboctahedra, edges with three equivalent Pb(3)Mg2Pb10 cuboctahedra, edges with three equivalent Pb(2)Mg4Pb8 cuboctahedra, faces with two equivalent Pb(3)Mg2Pb10 cuboctahedra, faces with two equivalent Pb(2)Mg4Pb8 cuboctahedra, and faces with four equivalent Pb(1)Pb12 cuboctahedra. In the second Pb site, Pb(2) is bonded to four equivalent Mg(1), two equivalent Pb(1), two equivalent Pb(2), two equivalent Pb(3), and two equivalent Pb(4) atoms to form distorted PbMg4Pb8 cuboctahedra that share corners with six equivalent Pb(3)Mg2Pb10 cuboctahedra, corners with six equivalent Pb(2)Mg4Pb8 cuboctahedra, corners with six equivalent Pb(1)Pb12 cuboctahedra, edges with three equivalent Pb(3)Mg2Pb10 cuboctahedra, edges with three equivalent Pb(1)Pb12 cuboctahedra, faces with two equivalent Pb(3)Mg2Pb10 cuboctahedra, faces with two equivalent Pb(1)Pb12 cuboctahedra, and faces with four equivalent Pb(2)Mg4Pb8 cuboctahedra. In the third Pb site, Pb(3) is bonded to two equivalent Mg(1), two equivalent Pb(1), two equivalent Pb(2), two equivalent Pb(3), and four equivalent Pb(5) atoms to form distorted PbMg2Pb10 cuboctahedra that share corners with six equivalent Pb(3)Mg2Pb10 cuboctahedra, corners with six equivalent Pb(2)Mg4Pb8 cuboctahedra, corners with six equivalent Pb(1)Pb12 cuboctahedra, edges with three equivalent Pb(2)Mg4Pb8 cuboctahedra, edges with three equivalent Pb(1)Pb12 cuboctahedra, faces with two equivalent Pb(2)Mg4Pb8 cuboctahedra, faces with two equivalent Pb(1)Pb12 cuboctahedra, and faces with four equivalent Pb(3)Mg2Pb10 cuboctahedra. In the fourth Pb site, Pb(4) is bonded in a 2-coordinate geometry to two equivalent Mg(1), two equivalent Pb(2), and four equivalent Pb(1) atoms. In the fifth Pb site, Pb(5) is bonded in a 2-coordinate geometry to two equivalent Mg(1), two equivalent Pb(1), and four equivalent Pb(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgPb5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.964
_cell_length_b   8.964
_cell_length_c   5.761
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   157.441
_symmetry_Int_Tables_number   1
_cell_volume   177.612
_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  0.778  0.222  0.000  1.0
  Pb  Pb1  1  0.999  0.001  0.500  1.0
  Pb  Pb2  1  0.330  0.670  0.500  1.0
  Pb  Pb3  1  0.666  0.334  0.500  1.0
  Pb  Pb4  1  0.435  0.565  0.000  1.0
  Pb  Pb5  1  0.125  0.875  0.000  1.0
[/CIF]
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The compound described by MgPb5 crystallizes in the orthorhombic Amm2 space group. Mg(1) is bonded in a 10-coordinate geometry to two equivalent Pb(3), two equivalent Pb(4), two equivalent Pb(5), and four equivalent Pb(2) atoms. There are five inequivalent Pb sites. In the first Pb site, Pb(1) is bonded to two equivalent Pb(1), two equivalent Pb(2), two equivalent Pb(3), two equivalent Pb(5), and four equivalent Pb(4) atoms to form distorted PbPb12 cuboctahedra that share corners with six equivalent Pb(3)Mg2Pb10 cuboctahedra, corners with six equivalent Pb(2)Mg4Pb8 cuboctahedra, corners with six equivalent Pb(1)Pb12 cuboctahedra, edges with three equivalent Pb(3)Mg2Pb10 cuboctahedra, edges with three equivalent Pb(2)Mg4Pb8 cuboctahedra, faces with two equivalent Pb(3)Mg2Pb10 cuboctahedra, faces with two equivalent Pb(2)Mg4Pb8 cuboctahedra, and faces with four equivalent Pb(1)Pb12 cuboctahedra. In the second Pb site, Pb(2) is bonded to four equivalent Mg(1), two equivalent Pb(1), two equivalent Pb(2), two equivalent Pb(3), and two equivalent Pb(4) atoms to form distorted PbMg4Pb8 cuboctahedra that share corners with six equivalent Pb(3)Mg2Pb10 cuboctahedra, corners with six equivalent Pb(2)Mg4Pb8 cuboctahedra, corners with six equivalent Pb(1)Pb12 cuboctahedra, edges with three equivalent Pb(3)Mg2Pb10 cuboctahedra, edges with three equivalent Pb(1)Pb12 cuboctahedra, faces with two equivalent Pb(3)Mg2Pb10 cuboctahedra, faces with two equivalent Pb(1)Pb12 cuboctahedra, and faces with four equivalent Pb(2)Mg4Pb8 cuboctahedra. In the third Pb site, Pb(3) is bonded to two equivalent Mg(1), two equivalent Pb(1), two equivalent Pb(2), two equivalent Pb(3), and four equivalent Pb(5) atoms to form distorted PbMg2Pb10 cuboctahedra that share corners with six equivalent Pb(3)Mg2Pb10 cuboctahedra, corners with six equivalent Pb(2)Mg4Pb8 cuboctahedra, corners with six equivalent Pb(1)Pb12 cuboctahedra, edges with three equivalent Pb(2)Mg4Pb8 cuboctahedra, edges with three equivalent Pb(1)Pb12 cuboctahedra, faces with two equivalent Pb(2)Mg4Pb8 cuboctahedra, faces with two equivalent Pb(1)Pb12 cuboctahedra, and faces with four equivalent Pb(3)Mg2Pb10 cuboctahedra. In the fourth Pb site, Pb(4) is bonded in a 2-coordinate geometry to two equivalent Mg(1), two equivalent Pb(2), and four equivalent Pb(1) atoms. In the fifth Pb site, Pb(5) is bonded in a 2-coordinate geometry to two equivalent Mg(1), two equivalent Pb(1), and four equivalent Pb(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgPb5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.964
_cell_length_b   8.964
_cell_length_c   5.761
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   157.441
_symmetry_Int_Tables_number   1
_cell_volume   177.612
_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  0.778  0.222  0.000  1.0
  Pb  Pb1  1  0.999  0.001  0.500  1.0
  Pb  Pb2  1  0.330  0.670  0.500  1.0
  Pb  Pb3  1  0.666  0.334  0.500  1.0
  Pb  Pb4  1  0.435  0.565  0.000  1.0
  Pb  Pb5  1  0.125  0.875  0.000  1.0
[/CIF]
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