data_Mg2TlZn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.31
_cell_length_b   3.31
_cell_length_c   7.92
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Mg2TlZn
_chemical_formula_sum   'Mg2 Tl1 Zn1'
_cell_volume   86.87
_cell_formula_units_Z   1
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  0.66  0.66  0.7  1.0
  Mg  Mg1  1  0.66  0.66  0.22  1.0
  Tl  Tl2  1  0.0  0.0  0.96  1.0
  Zn  Zn3  1  0.0  0.0  0.0  1.0

data_Mg2TlZn
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.68
_cell_length_b   4.68
_cell_length_c   7.92
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Mg2TlZn
_chemical_formula_sum   'Mg4 Tl2 Zn2'
_cell_volume   173.75
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  2  0.16  0.5  0.22  1.0
  Mg  Mg1  2  0.16  0.5  0.7  1.0
  Tl  Tl2  2  0.0  0.0  0.96  1.0
  Zn  Zn3  2  0.0  0.0  0.0  1.0

Mg Mg Tl Zn
Mg2ZnTl crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Mg2ZnTl clusters. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded in a distorted single-bond geometry to one Tl(1) atom. The Mg(1)-Tl(1) bond length is 2.62 Å. In the second Mg site, Mg(2) is bonded in a distorted single-bond geometry to one Zn(1) atom. The Mg(2)-Zn(1) bond length is 2.37 Å. Zn(1) is bonded in a distorted single-bond geometry to one Mg(2) and one Tl(1) atom. The Zn(1)-Tl(1) bond length is 0.32 Å. Tl(1) is bonded in a single-bond geometry to one Mg(1) and one Zn(1) atom.