The material described by Mg2Cd crystallizes in the trigonal P-3m1 space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to three equivalent Mg(2), six equivalent Mg(1), and three equivalent Cd(1) atoms to form distorted MgMg9Cd3 cuboctahedra that share corners with six equivalent Mg(2)Mg12 cuboctahedra; corners with six equivalent Mg(1)Mg9Cd3 cuboctahedra; corners with six equivalent Cd(1)Mg3Cd9 cuboctahedra; edges with six equivalent Mg(2)Mg12 cuboctahedra; edges with six equivalent Mg(1)Mg9Cd3 cuboctahedra; edges with six equivalent Cd(1)Mg3Cd9 cuboctahedra; faces with six equivalent Mg(1)Mg9Cd3 cuboctahedra; faces with seven Mg(2,2)Mg12 cuboctahedra; and faces with seven equivalent Cd(1)Mg3Cd9 cuboctahedra. In the second Mg site, Mg(2) is bonded to three equivalent Mg(1) and nine Mg(2,2) atoms to form MgMg12 cuboctahedra that share corners with six equivalent Mg(2)Mg12 cuboctahedra; corners with six equivalent Mg(1)Mg9Cd3 cuboctahedra; corners with six equivalent Cd(1)Mg3Cd9 cuboctahedra; edges with six equivalent Mg(1)Mg9Cd3 cuboctahedra; edges with twelve Mg(2,2)Mg12 cuboctahedra;  a faceface with one Cd(1)Mg3Cd9 cuboctahedra; faces with seven equivalent Mg(1)Mg9Cd3 cuboctahedra; and faces with twelve Mg(2,2)Mg12 cuboctahedra. In the third Mg site, Mg(2) is bonded to three equivalent Mg(1) and nine Mg(2,2) atoms to form MgMg12 cuboctahedra that share corners with six equivalent Mg(2)Mg12 cuboctahedra; corners with six equivalent Mg(1)Mg9Cd3 cuboctahedra; corners with six equivalent Cd(1)Mg3Cd9 cuboctahedra; edges with six equivalent Mg(1)Mg9Cd3 cuboctahedra; edges with twelve Mg(2,2)Mg12 cuboctahedra;  a faceface with one Cd(1)Mg3Cd9 cuboctahedra; faces with seven equivalent Mg(1)Mg9Cd3 cuboctahedra; and faces with twelve Mg(2,2)Mg12 cuboctahedra. Cd(1) is bonded to three equivalent Mg(1) and nine equivalent Cd(1) atoms to form distorted CdMg3Cd9 cuboctahedra that share corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Mg(1)Mg9Cd3 cuboctahedra, corners with six equivalent Cd(1)Mg3Cd9 cuboctahedra, edges with six equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with twelve equivalent Cd(1)Mg3Cd9 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra, faces with seven equivalent Mg(1)Mg9Cd3 cuboctahedra, and faces with twelve equivalent Cd(1)Mg3Cd9 cuboctahedra. is represented by the CIF file [CIF]
data_Mg2Cd
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.134
_cell_length_b   3.134
_cell_length_c   15.939
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   135.574
_cell_formula_units_Z   2
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  0.333  0.667  0.752  1.0
  Mg  Mg1  1  0.667  0.333  0.584  1.0
  Mg  Mg2  1  0.333  0.667  0.416  1.0
  Mg  Mg3  1  0.667  0.333  0.248  1.0
  Cd  Cd4  1  0.667  0.333  0.915  1.0
  Cd  Cd5  1  0.333  0.667  0.085  1.0
[/CIF]
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The material described by Mg2Cd crystallizes in the trigonal P-3m1 space group. There are three inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to three equivalent Mg(2), six equivalent Mg(1), and three equivalent Cd(1) atoms to form distorted MgMg9Cd3 cuboctahedra that share corners with six equivalent Mg(2)Mg12 cuboctahedra; corners with six equivalent Mg(1)Mg9Cd3 cuboctahedra; corners with six equivalent Cd(1)Mg3Cd9 cuboctahedra; edges with six equivalent Mg(2)Mg12 cuboctahedra; edges with six equivalent Mg(1)Mg9Cd3 cuboctahedra; edges with six equivalent Cd(1)Mg3Cd9 cuboctahedra; faces with six equivalent Mg(1)Mg9Cd3 cuboctahedra; faces with seven Mg(2,2)Mg12 cuboctahedra; and faces with seven equivalent Cd(1)Mg3Cd9 cuboctahedra. In the second Mg site, Mg(2) is bonded to three equivalent Mg(1) and nine Mg(2,2) atoms to form MgMg12 cuboctahedra that share corners with six equivalent Mg(2)Mg12 cuboctahedra; corners with six equivalent Mg(1)Mg9Cd3 cuboctahedra; corners with six equivalent Cd(1)Mg3Cd9 cuboctahedra; edges with six equivalent Mg(1)Mg9Cd3 cuboctahedra; edges with twelve Mg(2,2)Mg12 cuboctahedra;  a faceface with one Cd(1)Mg3Cd9 cuboctahedra; faces with seven equivalent Mg(1)Mg9Cd3 cuboctahedra; and faces with twelve Mg(2,2)Mg12 cuboctahedra. In the third Mg site, Mg(2) is bonded to three equivalent Mg(1) and nine Mg(2,2) atoms to form MgMg12 cuboctahedra that share corners with six equivalent Mg(2)Mg12 cuboctahedra; corners with six equivalent Mg(1)Mg9Cd3 cuboctahedra; corners with six equivalent Cd(1)Mg3Cd9 cuboctahedra; edges with six equivalent Mg(1)Mg9Cd3 cuboctahedra; edges with twelve Mg(2,2)Mg12 cuboctahedra;  a faceface with one Cd(1)Mg3Cd9 cuboctahedra; faces with seven equivalent Mg(1)Mg9Cd3 cuboctahedra; and faces with twelve Mg(2,2)Mg12 cuboctahedra. Cd(1) is bonded to three equivalent Mg(1) and nine equivalent Cd(1) atoms to form distorted CdMg3Cd9 cuboctahedra that share corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Mg(1)Mg9Cd3 cuboctahedra, corners with six equivalent Cd(1)Mg3Cd9 cuboctahedra, edges with six equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with twelve equivalent Cd(1)Mg3Cd9 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra, faces with seven equivalent Mg(1)Mg9Cd3 cuboctahedra, and faces with twelve equivalent Cd(1)Mg3Cd9 cuboctahedra. is represented by the CIF file [CIF]
data_Mg2Cd
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.134
_cell_length_b   3.134
_cell_length_c   15.939
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   135.574
_cell_formula_units_Z   2
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  0.333  0.667  0.752  1.0
  Mg  Mg1  1  0.667  0.333  0.584  1.0
  Mg  Mg2  1  0.333  0.667  0.416  1.0
  Mg  Mg3  1  0.667  0.333  0.248  1.0
  Cd  Cd4  1  0.667  0.333  0.915  1.0
  Cd  Cd5  1  0.333  0.667  0.085  1.0
[/CIF]
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