The structure described by MgCd2 is Molybdenite structured and crystallizes in the hexagonal P6_3/mmc space group. Mg(1) is bonded to six equivalent Mg(1) and six equivalent Cd(1) atoms to form MgMg6Cd6 cuboctahedra that share corners with six equivalent Mg(1)Mg6Cd6 cuboctahedra, corners with twelve equivalent Cd(1)Mg3Cd9 cuboctahedra, edges with six equivalent Mg(1)Mg6Cd6 cuboctahedra, edges with twelve equivalent Cd(1)Mg3Cd9 cuboctahedra, faces with six equivalent Mg(1)Mg6Cd6 cuboctahedra, and faces with fourteen equivalent Cd(1)Mg3Cd9 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(1)Mg6Cd6 cuboctahedra, corners with twelve equivalent Cd(1)Mg3Cd9 cuboctahedra, edges with six equivalent Mg(1)Mg6Cd6 cuboctahedra, edges with twelve equivalent Cd(1)Mg3Cd9 cuboctahedra, faces with seven equivalent Mg(1)Mg6Cd6 cuboctahedra, and faces with thirteen equivalent Cd(1)Mg3Cd9 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgCd2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.153
_cell_length_b   3.153
_cell_length_c   15.673
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   134.898
_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  0.750  1.0
  Mg  Mg1  1  0.667  0.333  0.250  1.0
  Cd  Cd2  1  0.667  0.333  0.915  1.0
  Cd  Cd3  1  0.667  0.333  0.585  1.0
  Cd  Cd4  1  0.333  0.667  0.415  1.0
  Cd  Cd5  1  0.333  0.667  0.085  1.0
[/CIF]
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The structure described by MgCd2 is Molybdenite structured and crystallizes in the hexagonal P6_3/mmc space group. Mg(1) is bonded to six equivalent Mg(1) and six equivalent Cd(1) atoms to form MgMg6Cd6 cuboctahedra that share corners with six equivalent Mg(1)Mg6Cd6 cuboctahedra, corners with twelve equivalent Cd(1)Mg3Cd9 cuboctahedra, edges with six equivalent Mg(1)Mg6Cd6 cuboctahedra, edges with twelve equivalent Cd(1)Mg3Cd9 cuboctahedra, faces with six equivalent Mg(1)Mg6Cd6 cuboctahedra, and faces with fourteen equivalent Cd(1)Mg3Cd9 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(1)Mg6Cd6 cuboctahedra, corners with twelve equivalent Cd(1)Mg3Cd9 cuboctahedra, edges with six equivalent Mg(1)Mg6Cd6 cuboctahedra, edges with twelve equivalent Cd(1)Mg3Cd9 cuboctahedra, faces with seven equivalent Mg(1)Mg6Cd6 cuboctahedra, and faces with thirteen equivalent Cd(1)Mg3Cd9 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_MgCd2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.153
_cell_length_b   3.153
_cell_length_c   15.673
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   134.898
_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  0.750  1.0
  Mg  Mg1  1  0.667  0.333  0.250  1.0
  Cd  Cd2  1  0.667  0.333  0.915  1.0
  Cd  Cd3  1  0.667  0.333  0.585  1.0
  Cd  Cd4  1  0.333  0.667  0.415  1.0
  Cd  Cd5  1  0.333  0.667  0.085  1.0
[/CIF]
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