data_MgCrAu2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.91
_cell_length_b   2.91
_cell_length_c   7.7
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   91.26
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgCrAu2
_chemical_formula_sum   'Mg1 Cr1 Au2'
_cell_volume   65.27
_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
  Cr  Cr2  1  0.0  0.0  0.85  1.0
  Au  Au0  1  0.04  0.0  0.02  1.0
  Au  Au1  1  0.04  0.0  0.68  1.0

data_MgCrAu2
_symmetry_space_group_name_H-M   Pm
_cell_length_a   2.91
_cell_length_b   2.91
_cell_length_c   7.7
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   6
_chemical_formula_structural   MgCrAu2
_chemical_formula_sum   'Mg1 Cr1 Au2'
_cell_volume   65.28
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '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  0.0  0.0  0.0  1.0
  Cr  Cr1  1  0.0  0.0  0.85  1.0
  Au  Au2  1  0.04  0.0  0.02  1.0
  Au  Au3  1  0.04  0.0  0.68  1.0

Mg Cr Au Au
MgCrAu2 is Cyanogen Chloride-like structured and crystallizes in the monoclinic Pm space group. The structure is zero-dimensional and consists of one MgCrAu2 cluster. Mg(1) is bonded in a distorted single-bond geometry to one Cr(1) and one Au(1) atom. The Mg(1)-Cr(1) bond length is 1.17 Å. The Mg(1)-Au(1) bond length is 0.17 Å. Cr(1) is bonded in a linear geometry to one Mg(1) and one Au(2) atom. The Cr(1)-Au(2) bond length is 1.31 Å. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a single-bond geometry to one Mg(1) atom. In the second Au site, Au(2) is bonded in a single-bond geometry to one Cr(1) atom.