data_MgSiAu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.13
_cell_length_b   6.13
_cell_length_c   6.13
_cell_angle_alpha   151.29
_cell_angle_beta   151.29
_cell_angle_gamma   41.05
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgSiAu
_chemical_formula_sum   'Mg1 Si1 Au1'
_cell_volume   52.96
_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  Mg1  1  0.0  0.0  0.87  1.0
  Si  Si2  1  0.0  0.0  0.58  1.0
  Au  Au0  1  0.0  0.0  0.02  1.0

data_MgSiAu
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.3
_cell_length_b   4.3
_cell_length_c   6.13
_cell_angle_alpha   90.0
_cell_angle_beta   110.53
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   MgSiAu
_chemical_formula_sum   'Mg2 Si2 Au2'
_cell_volume   105.91
_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  0.37  0.5  0.87  1.0
  Si  Si1  2  0.08  0.5  0.58  1.0
  Au  Au2  2  0.02  0.0  0.02  1.0

Mg Si Au
MgAuSi crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two MgAuSi clusters. Mg(1) is bonded in a distorted single-bond geometry to one Au(1) and one Si(1) atom. The Mg(1)-Au(1) bond length is 0.96 Å. The Mg(1)-Si(1) bond length is 1.75 Å. Au(1) is bonded in a single-bond geometry to one Mg(1) atom. Si(1) is bonded in a single-bond geometry to one Mg(1) atom.