The material described by Mg2Cd crystallizes in the monoclinic Cm space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), three equivalent Mg(4), one Cd(2), and two equivalent Cd(1) atoms to form distorted MgMg9Cd3 cuboctahedra that share corners with six equivalent Mg(2)Mg7Cd5 cuboctahedra, corners with six equivalent Mg(3)Mg8Cd4 cuboctahedra, corners with six equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with two equivalent Mg(4)Mg8Cd4 cuboctahedra, edges with three equivalent Mg(2)Mg7Cd5 cuboctahedra, edges with three equivalent Mg(3)Mg8Cd4 cuboctahedra, edges with four equivalent Cd(2)Mg8Cd4 cuboctahedra, edges with six equivalent Cd(1)Mg8Cd4 cuboctahedra, faces with two equivalent Mg(1)Mg9Cd3 cuboctahedra, faces with three equivalent Mg(2)Mg7Cd5 cuboctahedra, faces with three equivalent Mg(3)Mg8Cd4 cuboctahedra, faces with three equivalent Cd(1)Mg8Cd4 cuboctahedra, faces with four equivalent Cd(2)Mg8Cd4 cuboctahedra, and faces with five equivalent Mg(4)Mg8Cd4 cuboctahedra. In the second Mg site, Mg(2) is bonded to one Mg(4), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Cd(2), and three equivalent Cd(1) atoms to form distorted MgMg7Cd5 cuboctahedra that share corners with six equivalent Mg(2)Mg7Cd5 cuboctahedra, corners with six equivalent Mg(3)Mg8Cd4 cuboctahedra, corners with six equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with two equivalent Cd(1)Mg8Cd4 cuboctahedra, edges with three equivalent Mg(3)Mg8Cd4 cuboctahedra, edges with three equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with four equivalent Mg(4)Mg8Cd4 cuboctahedra, edges with six equivalent Cd(2)Mg8Cd4 cuboctahedra, faces with two equivalent Mg(2)Mg7Cd5 cuboctahedra, faces with three equivalent Mg(3)Mg8Cd4 cuboctahedra, faces with three equivalent Mg(1)Mg9Cd3 cuboctahedra, faces with three equivalent Cd(2)Mg8Cd4 cuboctahedra, faces with four equivalent Mg(4)Mg8Cd4 cuboctahedra, and faces with five equivalent Cd(1)Mg8Cd4 cuboctahedra. In the third Mg site, Mg(3) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), one Cd(1), and three equivalent Cd(2) atoms to form distorted MgMg8Cd4 cuboctahedra that share corners with six equivalent Mg(2)Mg7Cd5 cuboctahedra, corners with six equivalent Mg(3)Mg8Cd4 cuboctahedra, corners with six equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with two equivalent Cd(2)Mg8Cd4 cuboctahedra, edges with three equivalent Mg(2)Mg7Cd5 cuboctahedra, edges with three equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with four equivalent Cd(1)Mg8Cd4 cuboctahedra, edges with six equivalent Mg(4)Mg8Cd4 cuboctahedra, faces with two equivalent Mg(3)Mg8Cd4 cuboctahedra, faces with three equivalent Mg(2)Mg7Cd5 cuboctahedra, faces with three equivalent Mg(4)Mg8Cd4 cuboctahedra, faces with three equivalent Mg(1)Mg9Cd3 cuboctahedra, faces with four equivalent Cd(1)Mg8Cd4 cuboctahedra, and faces with five equivalent Cd(2)Mg8Cd4 cuboctahedra. In the fourth Mg site, Mg(4) is bonded to one Mg(2), two equivalent Mg(3), two equivalent Mg(4), three equivalent Mg(1), two equivalent Cd(1), and two equivalent Cd(2) atoms to form distorted MgMg8Cd4 cuboctahedra that share corners with six equivalent Mg(4)Mg8Cd4 cuboctahedra, corners with six equivalent Cd(1)Mg8Cd4 cuboctahedra, corners with six equivalent Cd(2)Mg8Cd4 cuboctahedra, edges with two equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with three equivalent Cd(1)Mg8Cd4 cuboctahedra, edges with three equivalent Cd(2)Mg8Cd4 cuboctahedra, edges with four equivalent Mg(2)Mg7Cd5 cuboctahedra, edges with six equivalent Mg(3)Mg8Cd4 cuboctahedra, faces with two equivalent Mg(4)Mg8Cd4 cuboctahedra, faces with three equivalent Mg(3)Mg8Cd4 cuboctahedra, faces with three equivalent Cd(1)Mg8Cd4 cuboctahedra, faces with three equivalent Cd(2)Mg8Cd4 cuboctahedra, faces with four equivalent Mg(2)Mg7Cd5 cuboctahedra, and faces with five equivalent Mg(1)Mg9Cd3 cuboctahedra. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one Mg(3), two equivalent Mg(1), two equivalent Mg(4), three equivalent Mg(2), two equivalent Cd(1), and two equivalent Cd(2) atoms to form distorted CdMg8Cd4 cuboctahedra that share corners with six equivalent Mg(4)Mg8Cd4 cuboctahedra, corners with six equivalent Cd(1)Mg8Cd4 cuboctahedra, corners with six equivalent Cd(2)Mg8Cd4 cuboctahedra, edges with two equivalent Mg(2)Mg7Cd5 cuboctahedra, edges with three equivalent Mg(4)Mg8Cd4 cuboctahedra, edges with three equivalent Cd(2)Mg8Cd4 cuboctahedra, edges with four equivalent Mg(3)Mg8Cd4 cuboctahedra, edges with six equivalent Mg(1)Mg9Cd3 cuboctahedra, faces with two equivalent Cd(1)Mg8Cd4 cuboctahedra, faces with three equivalent Mg(4)Mg8Cd4 cuboctahedra, faces with three equivalent Mg(1)Mg9Cd3 cuboctahedra, faces with three equivalent Cd(2)Mg8Cd4 cuboctahedra, faces with four equivalent Mg(3)Mg8Cd4 cuboctahedra, and faces with five equivalent Mg(2)Mg7Cd5 cuboctahedra. In the second Cd site, Cd(2) is bonded to one Mg(1), two equivalent Mg(2), two equivalent Mg(4), three equivalent Mg(3), two equivalent Cd(1), and two equivalent Cd(2) atoms to form distorted CdMg8Cd4 cuboctahedra that share corners with six equivalent Mg(4)Mg8Cd4 cuboctahedra, corners with six equivalent Cd(1)Mg8Cd4 cuboctahedra, corners with six equivalent Cd(2)Mg8Cd4 cuboctahedra, edges with two equivalent Mg(3)Mg8Cd4 cuboctahedra, edges with three equivalent Mg(4)Mg8Cd4 cuboctahedra, edges with three equivalent Cd(1)Mg8Cd4 cuboctahedra, edges with four equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with six equivalent Mg(2)Mg7Cd5 cuboctahedra, faces with two equivalent Cd(2)Mg8Cd4 cuboctahedra, faces with three equivalent Mg(2)Mg7Cd5 cuboctahedra, faces with three equivalent Mg(4)Mg8Cd4 cuboctahedra, faces with three equivalent Cd(1)Mg8Cd4 cuboctahedra, faces with four equivalent Mg(1)Mg9Cd3 cuboctahedra, and faces with five equivalent Mg(3)Mg8Cd4 cuboctahedra. is represented by the CIF file [CIF]
data_Mg2Cd
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.893
_cell_length_b   5.893
_cell_length_c   7.403
_cell_angle_alpha   76.593
_cell_angle_beta   76.593
_cell_angle_gamma   31.145
_symmetry_Int_Tables_number   1
_cell_volume   129.046
_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  0.003  0.003  0.003  1.0
  Mg  Mg1  1  0.335  0.335  0.336  1.0
  Mg  Mg2  1  0.662  0.662  0.663  1.0
  Mg  Mg3  1  0.279  0.279  0.942  1.0
  Cd  Cd4  1  0.614  0.614  0.275  1.0
  Cd  Cd5  1  0.941  0.941  0.615  1.0
[/CIF]
.
The material described by Mg2Cd crystallizes in the monoclinic Cm space group. There are four inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), three equivalent Mg(4), one Cd(2), and two equivalent Cd(1) atoms to form distorted MgMg9Cd3 cuboctahedra that share corners with six equivalent Mg(2)Mg7Cd5 cuboctahedra, corners with six equivalent Mg(3)Mg8Cd4 cuboctahedra, corners with six equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with two equivalent Mg(4)Mg8Cd4 cuboctahedra, edges with three equivalent Mg(2)Mg7Cd5 cuboctahedra, edges with three equivalent Mg(3)Mg8Cd4 cuboctahedra, edges with four equivalent Cd(2)Mg8Cd4 cuboctahedra, edges with six equivalent Cd(1)Mg8Cd4 cuboctahedra, faces with two equivalent Mg(1)Mg9Cd3 cuboctahedra, faces with three equivalent Mg(2)Mg7Cd5 cuboctahedra, faces with three equivalent Mg(3)Mg8Cd4 cuboctahedra, faces with three equivalent Cd(1)Mg8Cd4 cuboctahedra, faces with four equivalent Cd(2)Mg8Cd4 cuboctahedra, and faces with five equivalent Mg(4)Mg8Cd4 cuboctahedra. In the second Mg site, Mg(2) is bonded to one Mg(4), two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Cd(2), and three equivalent Cd(1) atoms to form distorted MgMg7Cd5 cuboctahedra that share corners with six equivalent Mg(2)Mg7Cd5 cuboctahedra, corners with six equivalent Mg(3)Mg8Cd4 cuboctahedra, corners with six equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with two equivalent Cd(1)Mg8Cd4 cuboctahedra, edges with three equivalent Mg(3)Mg8Cd4 cuboctahedra, edges with three equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with four equivalent Mg(4)Mg8Cd4 cuboctahedra, edges with six equivalent Cd(2)Mg8Cd4 cuboctahedra, faces with two equivalent Mg(2)Mg7Cd5 cuboctahedra, faces with three equivalent Mg(3)Mg8Cd4 cuboctahedra, faces with three equivalent Mg(1)Mg9Cd3 cuboctahedra, faces with three equivalent Cd(2)Mg8Cd4 cuboctahedra, faces with four equivalent Mg(4)Mg8Cd4 cuboctahedra, and faces with five equivalent Cd(1)Mg8Cd4 cuboctahedra. In the third Mg site, Mg(3) is bonded to two equivalent Mg(1), two equivalent Mg(2), two equivalent Mg(3), two equivalent Mg(4), one Cd(1), and three equivalent Cd(2) atoms to form distorted MgMg8Cd4 cuboctahedra that share corners with six equivalent Mg(2)Mg7Cd5 cuboctahedra, corners with six equivalent Mg(3)Mg8Cd4 cuboctahedra, corners with six equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with two equivalent Cd(2)Mg8Cd4 cuboctahedra, edges with three equivalent Mg(2)Mg7Cd5 cuboctahedra, edges with three equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with four equivalent Cd(1)Mg8Cd4 cuboctahedra, edges with six equivalent Mg(4)Mg8Cd4 cuboctahedra, faces with two equivalent Mg(3)Mg8Cd4 cuboctahedra, faces with three equivalent Mg(2)Mg7Cd5 cuboctahedra, faces with three equivalent Mg(4)Mg8Cd4 cuboctahedra, faces with three equivalent Mg(1)Mg9Cd3 cuboctahedra, faces with four equivalent Cd(1)Mg8Cd4 cuboctahedra, and faces with five equivalent Cd(2)Mg8Cd4 cuboctahedra. In the fourth Mg site, Mg(4) is bonded to one Mg(2), two equivalent Mg(3), two equivalent Mg(4), three equivalent Mg(1), two equivalent Cd(1), and two equivalent Cd(2) atoms to form distorted MgMg8Cd4 cuboctahedra that share corners with six equivalent Mg(4)Mg8Cd4 cuboctahedra, corners with six equivalent Cd(1)Mg8Cd4 cuboctahedra, corners with six equivalent Cd(2)Mg8Cd4 cuboctahedra, edges with two equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with three equivalent Cd(1)Mg8Cd4 cuboctahedra, edges with three equivalent Cd(2)Mg8Cd4 cuboctahedra, edges with four equivalent Mg(2)Mg7Cd5 cuboctahedra, edges with six equivalent Mg(3)Mg8Cd4 cuboctahedra, faces with two equivalent Mg(4)Mg8Cd4 cuboctahedra, faces with three equivalent Mg(3)Mg8Cd4 cuboctahedra, faces with three equivalent Cd(1)Mg8Cd4 cuboctahedra, faces with three equivalent Cd(2)Mg8Cd4 cuboctahedra, faces with four equivalent Mg(2)Mg7Cd5 cuboctahedra, and faces with five equivalent Mg(1)Mg9Cd3 cuboctahedra. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded to one Mg(3), two equivalent Mg(1), two equivalent Mg(4), three equivalent Mg(2), two equivalent Cd(1), and two equivalent Cd(2) atoms to form distorted CdMg8Cd4 cuboctahedra that share corners with six equivalent Mg(4)Mg8Cd4 cuboctahedra, corners with six equivalent Cd(1)Mg8Cd4 cuboctahedra, corners with six equivalent Cd(2)Mg8Cd4 cuboctahedra, edges with two equivalent Mg(2)Mg7Cd5 cuboctahedra, edges with three equivalent Mg(4)Mg8Cd4 cuboctahedra, edges with three equivalent Cd(2)Mg8Cd4 cuboctahedra, edges with four equivalent Mg(3)Mg8Cd4 cuboctahedra, edges with six equivalent Mg(1)Mg9Cd3 cuboctahedra, faces with two equivalent Cd(1)Mg8Cd4 cuboctahedra, faces with three equivalent Mg(4)Mg8Cd4 cuboctahedra, faces with three equivalent Mg(1)Mg9Cd3 cuboctahedra, faces with three equivalent Cd(2)Mg8Cd4 cuboctahedra, faces with four equivalent Mg(3)Mg8Cd4 cuboctahedra, and faces with five equivalent Mg(2)Mg7Cd5 cuboctahedra. In the second Cd site, Cd(2) is bonded to one Mg(1), two equivalent Mg(2), two equivalent Mg(4), three equivalent Mg(3), two equivalent Cd(1), and two equivalent Cd(2) atoms to form distorted CdMg8Cd4 cuboctahedra that share corners with six equivalent Mg(4)Mg8Cd4 cuboctahedra, corners with six equivalent Cd(1)Mg8Cd4 cuboctahedra, corners with six equivalent Cd(2)Mg8Cd4 cuboctahedra, edges with two equivalent Mg(3)Mg8Cd4 cuboctahedra, edges with three equivalent Mg(4)Mg8Cd4 cuboctahedra, edges with three equivalent Cd(1)Mg8Cd4 cuboctahedra, edges with four equivalent Mg(1)Mg9Cd3 cuboctahedra, edges with six equivalent Mg(2)Mg7Cd5 cuboctahedra, faces with two equivalent Cd(2)Mg8Cd4 cuboctahedra, faces with three equivalent Mg(2)Mg7Cd5 cuboctahedra, faces with three equivalent Mg(4)Mg8Cd4 cuboctahedra, faces with three equivalent Cd(1)Mg8Cd4 cuboctahedra, faces with four equivalent Mg(1)Mg9Cd3 cuboctahedra, and faces with five equivalent Mg(3)Mg8Cd4 cuboctahedra. is represented by the CIF file [CIF]
data_Mg2Cd
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.893
_cell_length_b   5.893
_cell_length_c   7.403
_cell_angle_alpha   76.593
_cell_angle_beta   76.593
_cell_angle_gamma   31.145
_symmetry_Int_Tables_number   1
_cell_volume   129.046
_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  0.003  0.003  0.003  1.0
  Mg  Mg1  1  0.335  0.335  0.336  1.0
  Mg  Mg2  1  0.662  0.662  0.663  1.0
  Mg  Mg3  1  0.279  0.279  0.942  1.0
  Cd  Cd4  1  0.614  0.614  0.275  1.0
  Cd  Cd5  1  0.941  0.941  0.615  1.0
[/CIF]
.