data_MgAuCl2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.98
_cell_length_b   4.98
_cell_length_c   4.98
_cell_angle_alpha   123.68
_cell_angle_beta   123.68
_cell_angle_gamma   83.74
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgAuCl2
_chemical_formula_sum   'Mg1 Au1 Cl2'
_cell_volume   81.82
_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  Mg3  1  0.0  0.0  0.0  1.0
  Au  Au0  1  0.0  0.0  0.71  1.0
  Cl  Cl1  1  0.0  0.35  0.85  1.0
  Cl  Cl2  1  0.35  0.0  0.85  1.0

data_MgAuCl2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.64
_cell_length_b   6.64
_cell_length_c   4.98
_cell_angle_alpha   90.0
_cell_angle_beta   131.87
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   MgAuCl2
_chemical_formula_sum   'Mg2 Au2 Cl4'
_cell_volume   163.64
_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  0.0  0.0  0.0  1.0
  Au  Au1  2  0.29  0.0  0.29  1.0
  Cl  Cl2  4  0.32  0.17  0.5  1.0

Mg Au Cl Cl
MgAuCl2 is Copper structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two MgAuCl2 clusters. Mg(1) is bonded in a distorted single-bond geometry to one Au(1) atom. The Mg(1)-Au(1) bond length is 1.46 Å. Au(1) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1) and two equivalent Cl(1) atoms. Both Au(1)-Cl(1) bond lengths are 1.46 Å. Cl(1) is bonded in a distorted single-bond geometry to one Au(1) atom.