data_NaSiAu2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.14
_cell_length_b   5.14
_cell_length_c   5.14
_cell_angle_alpha   132.99
_cell_angle_beta   132.99
_cell_angle_gamma   68.66
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaSiAu2
_chemical_formula_sum   'Na1 Si1 Au2'
_cell_volume   71.45
_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
  Na  Na2  1  0.0  0.0  0.0  1.0
  Si  Si3  1  0.05  0.0  0.12  1.0
  Au  Au0  1  0.0  0.0  0.25  1.0
  Au  Au1  1  0.0  0.05  0.12  1.0

data_NaSiAu2
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.1
_cell_length_b   4.1
_cell_length_c   5.14
_cell_angle_alpha   113.5
_cell_angle_beta   113.5
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaSiAu2
_chemical_formula_sum   'Na1 Si1 Au2'
_cell_volume   71.45
_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
  Na  Na0  1  0.0  0.0  0.0  1.0
  Si  Si1  1  0.88  0.0  0.93  1.0
  Au  Au2  1  0.75  0.0  0.75  1.0
  Au  Au3  1  0.93  0.05  0.93  1.0

Na Si Au Au
NaAu2Si crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one NaAu2Si cluster. Na(1) is bonded in a 2-coordinate geometry to one Au(2) and one Si(1) atom. The Na(1)-Au(2) bond length is 0.49 Å. The Na(1)-Si(1) bond length is 0.49 Å. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a distorted single-bond geometry to one Si(1) atom. The Au(1)-Si(1) bond length is 0.84 Å. In the second Au site, Au(2) is bonded in a distorted single-bond geometry to one Na(1) and one Si(1) atom. The Au(2)-Si(1) bond length is 0.30 Å. Si(1) is bonded in a single-bond geometry to one Na(1), one Au(1), and one Au(2) atom.