data_K2CoSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.14
_cell_length_b   6.14
_cell_length_c   6.14
_cell_angle_alpha   139.42
_cell_angle_beta   125.01
_cell_angle_gamma   70.54
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2CoSe
_chemical_formula_sum   'K2 Co1 Se1'
_cell_volume   121.25
_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  0.0  0.84  0.7  1.0
  K  K2  1  0.0  0.0  0.87  1.0
  Co  Co0  1  0.0  0.0  0.6  1.0
  Se  Se3  1  0.0  0.84  0.88  1.0

data_K2CoSe
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.26
_cell_length_b   5.67
_cell_length_c   6.14
_cell_angle_alpha   117.5
_cell_angle_beta   110.29
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2CoSe
_chemical_formula_sum   'K2 Co1 Se1'
_cell_volume   121.25
_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  K0  1  0.13  0.13  0.13  1.0
  K  K1  1  0.3  0.14  0.14  1.0
  Co  Co2  1  0.4  0.4  0.4  1.0
  Se  Se3  1  0.12  0.96  0.96  1.0

K K Co Se
K K Co Se 0 1 o + o 0 2 o + o 0 3 o o o 1 2 o o o 1 3 o - o 
K2CoSe crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one K2CoSe cluster. There are two inequivalent K sites. In the first K site, K(1) is bonded in a distorted T-shaped geometry to one K(2), one Co(1), and one Se(1) atom. The K(1)-K(2) bond length is 0.70 Å. The K(1)-Co(1) bond length is 1.51 Å. The K(1)-Se(1) bond length is 1.09 Å. In the second K site, K(2) is bonded in a 3-coordinate geometry to one K(1), one Co(1), and one Se(1) atom. The K(2)-Co(1) bond length is 1.61 Å. The K(2)-Se(1) bond length is 1.07 Å. Co(1) is bonded in a 2-coordinate geometry to one K(1) and one K(2) atom. Se(1) is bonded in a 2-coordinate geometry to one K(1) and one K(2) atom.