data_K2AuSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.07
_cell_length_b   6.07
_cell_length_c   3.13
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2AuSe
_chemical_formula_sum   'K2 Au1 Se1'
_cell_volume   115.45
_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
  K  K1  1  0.04  0.0  0.36  1.0
  K  K2  1  0.0  0.04  0.36  1.0
  Au  Au0  1  0.04  0.04  0.99  1.0
  Se  Se3  1  0.0  0.0  0.95  1.0

data_K2AuSe
_symmetry_space_group_name_H-M   Cm
_cell_length_a   8.59
_cell_length_b   8.59
_cell_length_c   3.13
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   K2AuSe
_chemical_formula_sum   'K4 Au2 Se2'
_cell_volume   230.91
_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
  K  K0  4  0.02  0.02  0.36  1.0
  Au  Au1  2  0.04  0.0  0.99  1.0
  Se  Se2  2  0.0  0.0  0.95  1.0

K K Au Se
(K)2AuSe crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two potassium molecules and two AuSe clusters. In each AuSe cluster, Au(1) is bonded in a distorted single-bond geometry to one Se(1) atom. The Au(1)-Se(1) bond length is 0.34 Å. Se(1) is bonded in a single-bond geometry to one Au(1) atom.