The compound described by Mg2Zn 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 Zn(2), and two equivalent Zn(1) atoms to form distorted MgMg9Zn3 cuboctahedra that share corners with six equivalent Mg(2)Mg7Zn5 cuboctahedra, corners with six equivalent Mg(3)Mg8Zn4 cuboctahedra, corners with six equivalent Mg(1)Mg9Zn3 cuboctahedra, edges with two equivalent Mg(4)Mg8Zn4 cuboctahedra, edges with three equivalent Mg(2)Mg7Zn5 cuboctahedra, edges with three equivalent Mg(3)Mg8Zn4 cuboctahedra, faces with two equivalent Mg(1)Mg9Zn3 cuboctahedra, faces with three equivalent Mg(2)Mg7Zn5 cuboctahedra, faces with three equivalent Mg(3)Mg8Zn4 cuboctahedra, and faces with five equivalent Mg(4)Mg8Zn4 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 Zn(2), and three equivalent Zn(1) atoms to form distorted MgMg7Zn5 cuboctahedra that share corners with six equivalent Mg(2)Mg7Zn5 cuboctahedra, corners with six equivalent Mg(3)Mg8Zn4 cuboctahedra, corners with six equivalent Mg(1)Mg9Zn3 cuboctahedra, edges with three equivalent Mg(3)Mg8Zn4 cuboctahedra, edges with three equivalent Mg(1)Mg9Zn3 cuboctahedra, edges with four equivalent Mg(4)Mg8Zn4 cuboctahedra, faces with two equivalent Mg(2)Mg7Zn5 cuboctahedra, faces with three equivalent Mg(3)Mg8Zn4 cuboctahedra, faces with three equivalent Mg(1)Mg9Zn3 cuboctahedra, and faces with four equivalent Mg(4)Mg8Zn4 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 Zn(1), and three equivalent Zn(2) atoms to form distorted MgMg8Zn4 cuboctahedra that share corners with six equivalent Mg(2)Mg7Zn5 cuboctahedra, corners with six equivalent Mg(3)Mg8Zn4 cuboctahedra, corners with six equivalent Mg(1)Mg9Zn3 cuboctahedra, edges with three equivalent Mg(2)Mg7Zn5 cuboctahedra, edges with three equivalent Mg(1)Mg9Zn3 cuboctahedra, edges with six equivalent Mg(4)Mg8Zn4 cuboctahedra, faces with two equivalent Mg(3)Mg8Zn4 cuboctahedra, faces with three equivalent Mg(2)Mg7Zn5 cuboctahedra, faces with three equivalent Mg(4)Mg8Zn4 cuboctahedra, and faces with three equivalent Mg(1)Mg9Zn3 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 Zn(1), and two equivalent Zn(2) atoms to form distorted MgMg8Zn4 cuboctahedra that share corners with six equivalent Mg(4)Mg8Zn4 cuboctahedra, edges with two equivalent Mg(1)Mg9Zn3 cuboctahedra, edges with four equivalent Mg(2)Mg7Zn5 cuboctahedra, edges with six equivalent Mg(3)Mg8Zn4 cuboctahedra, faces with two equivalent Mg(4)Mg8Zn4 cuboctahedra, faces with three equivalent Mg(3)Mg8Zn4 cuboctahedra, faces with four equivalent Mg(2)Mg7Zn5 cuboctahedra, and faces with five equivalent Mg(1)Mg9Zn3 cuboctahedra. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 8-coordinate geometry to one Mg(3), two equivalent Mg(1), two equivalent Mg(4), and three equivalent Mg(2) atoms. In the second Zn site, Zn(2) is bonded in a 8-coordinate geometry to one Mg(1), two equivalent Mg(2), two equivalent Mg(4), and three equivalent Mg(3) atoms. is represented by the CIF card [CIF]
data_Mg2Zn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.715
_cell_length_b   5.715
_cell_length_c   7.070
_cell_angle_alpha   78.185
_cell_angle_beta   78.185
_cell_angle_gamma   31.793
_symmetry_Int_Tables_number   1
_cell_volume   118.854
_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  0.005  0.005  0.006  1.0
  Mg  Mg1  1  0.335  0.335  0.341  1.0
  Mg  Mg2  1  0.658  0.658  0.658  1.0
  Mg  Mg3  1  0.281  0.281  0.940  1.0
  Zn  Zn4  1  0.611  0.611  0.281  1.0
  Zn  Zn5  1  0.944  0.944  0.608  1.0
[/CIF]
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The compound described by Mg2Zn 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 Zn(2), and two equivalent Zn(1) atoms to form distorted MgMg9Zn3 cuboctahedra that share corners with six equivalent Mg(2)Mg7Zn5 cuboctahedra, corners with six equivalent Mg(3)Mg8Zn4 cuboctahedra, corners with six equivalent Mg(1)Mg9Zn3 cuboctahedra, edges with two equivalent Mg(4)Mg8Zn4 cuboctahedra, edges with three equivalent Mg(2)Mg7Zn5 cuboctahedra, edges with three equivalent Mg(3)Mg8Zn4 cuboctahedra, faces with two equivalent Mg(1)Mg9Zn3 cuboctahedra, faces with three equivalent Mg(2)Mg7Zn5 cuboctahedra, faces with three equivalent Mg(3)Mg8Zn4 cuboctahedra, and faces with five equivalent Mg(4)Mg8Zn4 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 Zn(2), and three equivalent Zn(1) atoms to form distorted MgMg7Zn5 cuboctahedra that share corners with six equivalent Mg(2)Mg7Zn5 cuboctahedra, corners with six equivalent Mg(3)Mg8Zn4 cuboctahedra, corners with six equivalent Mg(1)Mg9Zn3 cuboctahedra, edges with three equivalent Mg(3)Mg8Zn4 cuboctahedra, edges with three equivalent Mg(1)Mg9Zn3 cuboctahedra, edges with four equivalent Mg(4)Mg8Zn4 cuboctahedra, faces with two equivalent Mg(2)Mg7Zn5 cuboctahedra, faces with three equivalent Mg(3)Mg8Zn4 cuboctahedra, faces with three equivalent Mg(1)Mg9Zn3 cuboctahedra, and faces with four equivalent Mg(4)Mg8Zn4 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 Zn(1), and three equivalent Zn(2) atoms to form distorted MgMg8Zn4 cuboctahedra that share corners with six equivalent Mg(2)Mg7Zn5 cuboctahedra, corners with six equivalent Mg(3)Mg8Zn4 cuboctahedra, corners with six equivalent Mg(1)Mg9Zn3 cuboctahedra, edges with three equivalent Mg(2)Mg7Zn5 cuboctahedra, edges with three equivalent Mg(1)Mg9Zn3 cuboctahedra, edges with six equivalent Mg(4)Mg8Zn4 cuboctahedra, faces with two equivalent Mg(3)Mg8Zn4 cuboctahedra, faces with three equivalent Mg(2)Mg7Zn5 cuboctahedra, faces with three equivalent Mg(4)Mg8Zn4 cuboctahedra, and faces with three equivalent Mg(1)Mg9Zn3 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 Zn(1), and two equivalent Zn(2) atoms to form distorted MgMg8Zn4 cuboctahedra that share corners with six equivalent Mg(4)Mg8Zn4 cuboctahedra, edges with two equivalent Mg(1)Mg9Zn3 cuboctahedra, edges with four equivalent Mg(2)Mg7Zn5 cuboctahedra, edges with six equivalent Mg(3)Mg8Zn4 cuboctahedra, faces with two equivalent Mg(4)Mg8Zn4 cuboctahedra, faces with three equivalent Mg(3)Mg8Zn4 cuboctahedra, faces with four equivalent Mg(2)Mg7Zn5 cuboctahedra, and faces with five equivalent Mg(1)Mg9Zn3 cuboctahedra. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a 8-coordinate geometry to one Mg(3), two equivalent Mg(1), two equivalent Mg(4), and three equivalent Mg(2) atoms. In the second Zn site, Zn(2) is bonded in a 8-coordinate geometry to one Mg(1), two equivalent Mg(2), two equivalent Mg(4), and three equivalent Mg(3) atoms. is represented by the CIF card [CIF]
data_Mg2Zn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.715
_cell_length_b   5.715
_cell_length_c   7.070
_cell_angle_alpha   78.185
_cell_angle_beta   78.185
_cell_angle_gamma   31.793
_symmetry_Int_Tables_number   1
_cell_volume   118.854
_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  0.005  0.005  0.006  1.0
  Mg  Mg1  1  0.335  0.335  0.341  1.0
  Mg  Mg2  1  0.658  0.658  0.658  1.0
  Mg  Mg3  1  0.281  0.281  0.940  1.0
  Zn  Zn4  1  0.611  0.611  0.281  1.0
  Zn  Zn5  1  0.944  0.944  0.608  1.0
[/CIF]
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