The compound described by Mg2Zn crystallizes in the trigonal P-3m1 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to three equivalent Mg(2) and three equivalent Zn(1) atoms to form distorted MgMg3Zn3 cuboctahedra that share corners with twelve equivalent Mg(2)Mg12 cuboctahedra, corners with twelve equivalent Zn(1)Mg3Zn9 cuboctahedra, edges with six equivalent Mg(2)Mg12 cuboctahedra, edges with six equivalent Mg(1)Mg3Zn3 cuboctahedra, edges with six equivalent Zn(1)Mg3Zn9 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra, and  a faceface with one Zn(1)Mg3Zn9 cuboctahedra. In the second Mg site, Mg(2) is bonded to three equivalent Mg(1) and nine equivalent Mg(2) atoms to form MgMg12 cuboctahedra that share corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Zn(1)Mg3Zn9 cuboctahedra, corners with twelve equivalent Mg(1)Mg3Zn3 cuboctahedra, edges with six equivalent Mg(1)Mg3Zn3 cuboctahedra, edges with twelve equivalent Mg(2)Mg12 cuboctahedra,  a faceface with one Mg(1)Mg3Zn3 cuboctahedra,  a faceface with one Zn(1)Mg3Zn9 cuboctahedra, and faces with twelve equivalent Mg(2)Mg12 cuboctahedra. Zn(1) is bonded to three equivalent Mg(1) and nine equivalent Zn(1) atoms to form distorted ZnMg3Zn9 cuboctahedra that share corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Zn(1)Mg3Zn9 cuboctahedra, corners with twelve equivalent Mg(1)Mg3Zn3 cuboctahedra, edges with six equivalent Mg(1)Mg3Zn3 cuboctahedra, edges with twelve equivalent Zn(1)Mg3Zn9 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Mg(1)Mg3Zn3 cuboctahedra, and faces with twelve equivalent Zn(1)Mg3Zn9 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg2Zn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.054
_cell_length_b   3.054
_cell_length_c   15.002
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   121.177
_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  0.667  0.333  0.776  1.0
  Mg  Mg1  1  0.333  0.667  0.591  1.0
  Mg  Mg2  1  0.667  0.333  0.409  1.0
  Mg  Mg3  1  0.333  0.667  0.224  1.0
  Zn  Zn4  1  0.333  0.667  0.931  1.0
  Zn  Zn5  1  0.667  0.333  0.069  1.0
[/CIF]
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The compound described by Mg2Zn crystallizes in the trigonal P-3m1 space group. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to three equivalent Mg(2) and three equivalent Zn(1) atoms to form distorted MgMg3Zn3 cuboctahedra that share corners with twelve equivalent Mg(2)Mg12 cuboctahedra, corners with twelve equivalent Zn(1)Mg3Zn9 cuboctahedra, edges with six equivalent Mg(2)Mg12 cuboctahedra, edges with six equivalent Mg(1)Mg3Zn3 cuboctahedra, edges with six equivalent Zn(1)Mg3Zn9 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra, and  a faceface with one Zn(1)Mg3Zn9 cuboctahedra. In the second Mg site, Mg(2) is bonded to three equivalent Mg(1) and nine equivalent Mg(2) atoms to form MgMg12 cuboctahedra that share corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Zn(1)Mg3Zn9 cuboctahedra, corners with twelve equivalent Mg(1)Mg3Zn3 cuboctahedra, edges with six equivalent Mg(1)Mg3Zn3 cuboctahedra, edges with twelve equivalent Mg(2)Mg12 cuboctahedra,  a faceface with one Mg(1)Mg3Zn3 cuboctahedra,  a faceface with one Zn(1)Mg3Zn9 cuboctahedra, and faces with twelve equivalent Mg(2)Mg12 cuboctahedra. Zn(1) is bonded to three equivalent Mg(1) and nine equivalent Zn(1) atoms to form distorted ZnMg3Zn9 cuboctahedra that share corners with six equivalent Mg(2)Mg12 cuboctahedra, corners with six equivalent Zn(1)Mg3Zn9 cuboctahedra, corners with twelve equivalent Mg(1)Mg3Zn3 cuboctahedra, edges with six equivalent Mg(1)Mg3Zn3 cuboctahedra, edges with twelve equivalent Zn(1)Mg3Zn9 cuboctahedra,  a faceface with one Mg(2)Mg12 cuboctahedra,  a faceface with one Mg(1)Mg3Zn3 cuboctahedra, and faces with twelve equivalent Zn(1)Mg3Zn9 cuboctahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Mg2Zn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.054
_cell_length_b   3.054
_cell_length_c   15.002
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   121.177
_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  0.667  0.333  0.776  1.0
  Mg  Mg1  1  0.333  0.667  0.591  1.0
  Mg  Mg2  1  0.667  0.333  0.409  1.0
  Mg  Mg3  1  0.333  0.667  0.224  1.0
  Zn  Zn4  1  0.333  0.667  0.931  1.0
  Zn  Zn5  1  0.667  0.333  0.069  1.0
[/CIF]
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