The material described by MgCd crystallizes in the monoclinic Cm space group. There are three 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), one Cd(2), two equivalent Cd(1), and three equivalent Cd(3) atoms to form distorted MgMg6Cd6 cuboctahedra that share corners with six equivalent Mg(1)Mg6Cd6 cuboctahedra, corners with eight equivalent Mg(3)Mg3Cd7 cuboctahedra,  an edgeedge with one Mg(3)Mg3Cd7 cuboctahedra, edges with four equivalent Cd(2)Mg6Cd6 cuboctahedra, edges with six equivalent Mg(2)Mg5Cd7 cuboctahedra, faces with two equivalent Mg(1)Mg6Cd6 cuboctahedra, faces with three equivalent Mg(3)Mg3Cd7 cuboctahedra, faces with three equivalent Mg(2)Mg5Cd7 cuboctahedra, and faces with four equivalent Cd(2)Mg6Cd6 cuboctahedra. In the second Mg site, Mg(2) is bonded to one Mg(3), two equivalent Mg(1), two equivalent Mg(2), two equivalent Cd(2), two equivalent Cd(3), and three equivalent Cd(1) atoms to form distorted MgMg5Cd7 cuboctahedra that share corners with six equivalent Mg(2)Mg5Cd7 cuboctahedra, corners with six equivalent Cd(2)Mg6Cd6 cuboctahedra, edges with three equivalent Cd(2)Mg6Cd6 cuboctahedra, edges with four equivalent Mg(3)Mg3Cd7 cuboctahedra, edges with six equivalent Mg(1)Mg6Cd6 cuboctahedra, faces with two equivalent Mg(2)Mg5Cd7 cuboctahedra, faces with three equivalent Mg(1)Mg6Cd6 cuboctahedra, faces with three equivalent Cd(2)Mg6Cd6 cuboctahedra, and faces with four equivalent Mg(3)Mg3Cd7 cuboctahedra. In the third Mg site, Mg(3) is bonded to one Mg(2), two equivalent Mg(1), two equivalent Cd(1), two equivalent Cd(3), and three equivalent Cd(2) atoms to form distorted MgMg3Cd7 cuboctahedra that share corners with two equivalent Cd(2)Mg6Cd6 cuboctahedra, corners with four equivalent Mg(3)Mg3Cd7 cuboctahedra, corners with eight equivalent Mg(1)Mg6Cd6 cuboctahedra,  an edgeedge with one Mg(1)Mg6Cd6 cuboctahedra, edges with four equivalent Mg(2)Mg5Cd7 cuboctahedra, faces with two equivalent Mg(3)Mg3Cd7 cuboctahedra, faces with three equivalent Mg(1)Mg6Cd6 cuboctahedra, faces with four equivalent Mg(2)Mg5Cd7 cuboctahedra, and faces with five equivalent Cd(2)Mg6Cd6 cuboctahedra. There are three inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 7-coordinate geometry to two equivalent Mg(1), two equivalent Mg(3), three equivalent Mg(2), and two equivalent Cd(2) atoms. In the second Cd site, Cd(2) is bonded to one Mg(1), two equivalent Mg(2), three equivalent Mg(3), two equivalent Cd(1), two equivalent Cd(2), and two equivalent Cd(3) atoms to form distorted CdMg6Cd6 cuboctahedra that share corners with two equivalent Mg(3)Mg3Cd7 cuboctahedra, corners with six equivalent Mg(2)Mg5Cd7 cuboctahedra, corners with six equivalent Cd(2)Mg6Cd6 cuboctahedra, edges with three equivalent Mg(2)Mg5Cd7 cuboctahedra, edges with four equivalent Mg(1)Mg6Cd6 cuboctahedra, faces with two equivalent Cd(2)Mg6Cd6 cuboctahedra, faces with three equivalent Mg(2)Mg5Cd7 cuboctahedra, faces with four equivalent Mg(1)Mg6Cd6 cuboctahedra, and faces with five equivalent Mg(3)Mg3Cd7 cuboctahedra. In the third Cd site, Cd(3) is bonded in a 7-coordinate geometry to two equivalent Mg(2), two equivalent Mg(3), three equivalent Mg(1), and two equivalent Cd(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgCd
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.808
_cell_length_b   5.808
_cell_length_c   7.527
_cell_angle_alpha   74.769
_cell_angle_beta   74.769
_cell_angle_gamma   31.446
_symmetry_Int_Tables_number   1
_cell_volume   127.423
_cell_formula_units_Z   3
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  0.011  0.011  0.995  1.0
  Mg  Mg1  1  0.383  0.383  0.726  1.0
  Mg  Mg2  1  0.330  0.330  0.337  1.0
  Cd  Cd3  1  0.662  0.662  0.665  1.0
  Cd  Cd4  1  0.050  0.050  0.385  1.0
  Cd  Cd5  1  0.731  0.731  0.060  1.0
[/CIF]
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The material described by MgCd crystallizes in the monoclinic Cm space group. There are three 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), one Cd(2), two equivalent Cd(1), and three equivalent Cd(3) atoms to form distorted MgMg6Cd6 cuboctahedra that share corners with six equivalent Mg(1)Mg6Cd6 cuboctahedra, corners with eight equivalent Mg(3)Mg3Cd7 cuboctahedra,  an edgeedge with one Mg(3)Mg3Cd7 cuboctahedra, edges with four equivalent Cd(2)Mg6Cd6 cuboctahedra, edges with six equivalent Mg(2)Mg5Cd7 cuboctahedra, faces with two equivalent Mg(1)Mg6Cd6 cuboctahedra, faces with three equivalent Mg(3)Mg3Cd7 cuboctahedra, faces with three equivalent Mg(2)Mg5Cd7 cuboctahedra, and faces with four equivalent Cd(2)Mg6Cd6 cuboctahedra. In the second Mg site, Mg(2) is bonded to one Mg(3), two equivalent Mg(1), two equivalent Mg(2), two equivalent Cd(2), two equivalent Cd(3), and three equivalent Cd(1) atoms to form distorted MgMg5Cd7 cuboctahedra that share corners with six equivalent Mg(2)Mg5Cd7 cuboctahedra, corners with six equivalent Cd(2)Mg6Cd6 cuboctahedra, edges with three equivalent Cd(2)Mg6Cd6 cuboctahedra, edges with four equivalent Mg(3)Mg3Cd7 cuboctahedra, edges with six equivalent Mg(1)Mg6Cd6 cuboctahedra, faces with two equivalent Mg(2)Mg5Cd7 cuboctahedra, faces with three equivalent Mg(1)Mg6Cd6 cuboctahedra, faces with three equivalent Cd(2)Mg6Cd6 cuboctahedra, and faces with four equivalent Mg(3)Mg3Cd7 cuboctahedra. In the third Mg site, Mg(3) is bonded to one Mg(2), two equivalent Mg(1), two equivalent Cd(1), two equivalent Cd(3), and three equivalent Cd(2) atoms to form distorted MgMg3Cd7 cuboctahedra that share corners with two equivalent Cd(2)Mg6Cd6 cuboctahedra, corners with four equivalent Mg(3)Mg3Cd7 cuboctahedra, corners with eight equivalent Mg(1)Mg6Cd6 cuboctahedra,  an edgeedge with one Mg(1)Mg6Cd6 cuboctahedra, edges with four equivalent Mg(2)Mg5Cd7 cuboctahedra, faces with two equivalent Mg(3)Mg3Cd7 cuboctahedra, faces with three equivalent Mg(1)Mg6Cd6 cuboctahedra, faces with four equivalent Mg(2)Mg5Cd7 cuboctahedra, and faces with five equivalent Cd(2)Mg6Cd6 cuboctahedra. There are three inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 7-coordinate geometry to two equivalent Mg(1), two equivalent Mg(3), three equivalent Mg(2), and two equivalent Cd(2) atoms. In the second Cd site, Cd(2) is bonded to one Mg(1), two equivalent Mg(2), three equivalent Mg(3), two equivalent Cd(1), two equivalent Cd(2), and two equivalent Cd(3) atoms to form distorted CdMg6Cd6 cuboctahedra that share corners with two equivalent Mg(3)Mg3Cd7 cuboctahedra, corners with six equivalent Mg(2)Mg5Cd7 cuboctahedra, corners with six equivalent Cd(2)Mg6Cd6 cuboctahedra, edges with three equivalent Mg(2)Mg5Cd7 cuboctahedra, edges with four equivalent Mg(1)Mg6Cd6 cuboctahedra, faces with two equivalent Cd(2)Mg6Cd6 cuboctahedra, faces with three equivalent Mg(2)Mg5Cd7 cuboctahedra, faces with four equivalent Mg(1)Mg6Cd6 cuboctahedra, and faces with five equivalent Mg(3)Mg3Cd7 cuboctahedra. In the third Cd site, Cd(3) is bonded in a 7-coordinate geometry to two equivalent Mg(2), two equivalent Mg(3), three equivalent Mg(1), and two equivalent Cd(2) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgCd
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.808
_cell_length_b   5.808
_cell_length_c   7.527
_cell_angle_alpha   74.769
_cell_angle_beta   74.769
_cell_angle_gamma   31.446
_symmetry_Int_Tables_number   1
_cell_volume   127.423
_cell_formula_units_Z   3
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  0.011  0.011  0.995  1.0
  Mg  Mg1  1  0.383  0.383  0.726  1.0
  Mg  Mg2  1  0.330  0.330  0.337  1.0
  Cd  Cd3  1  0.662  0.662  0.665  1.0
  Cd  Cd4  1  0.050  0.050  0.385  1.0
  Cd  Cd5  1  0.731  0.731  0.060  1.0
[/CIF]
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