data_K2Au
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.96
_cell_length_b   8.29
_cell_length_c   4.48
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2Au
_chemical_formula_sum   'K4 Au2'
_cell_volume   295.98
_cell_formula_units_Z   2
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
  K  K2  1  0.92  0.5  0.0  1.0
  K  K3  1  0.04  0.79  0.0  1.0
  K  K4  1  0.9  0.94  0.24  1.0
  K  K5  1  0.06  0.36  0.24  1.0
  Au  Au0  1  0.0  0.0  0.0  1.0
  Au  Au1  1  0.98  0.15  0.24  1.0

data_K2Au
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.48
_cell_length_b   7.96
_cell_length_c   8.29
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2Au
_chemical_formula_sum   'K4 Au2'
_cell_volume   295.98
_cell_formula_units_Z   2
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
  K  K0  1  0.0  0.04  0.79  1.0
  K  K1  1  0.0  0.92  0.5  1.0
  K  K2  1  0.24  0.06  0.36  1.0
  K  K3  1  0.24  0.9  0.94  1.0
  Au  Au4  1  0.0  0.0  0.0  1.0
  Au  Au5  1  0.24  0.98  0.15  1.0

K K K K Au Au
K K K K Au Au 0 3 + o o 1 4 o + o 1 2 - o o 2 4 + + o 2 5 o + o 3 5 - o o 4 5 - o o 
K2Au crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one K2Au cluster. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 2-coordinate geometry to one K(2) and one K(4) atom. The K(1)-K(2) bond length is 2.58 Å. The K(1)-K(4) bond length is 1.99 Å. In the second K site, K(2) is bonded in a 3-coordinate geometry to one K(1), one K(3), and one Au(1) atom. The K(2)-K(3) bond length is 1.99 Å. The K(2)-Au(1) bond length is 1.76 Å. In the third K site, K(3) is bonded in a distorted single-bond geometry to one K(2) and one Au(1) atom. The K(3)-Au(1) bond length is 1.46 Å. In the fourth K site, K(4) is bonded in a distorted single-bond geometry to one K(1) and one Au(2) atom. The K(4)-Au(2) bond length is 1.85 Å. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a distorted single-bond geometry to one K(2) and one K(3) atom. In the second Au site, Au(2) is bonded in a distorted single-bond geometry to one K(4) atom.