The crystal structure described by KC8 crystallizes in the orthorhombic Fddd space group. K(1) is bonded to four equivalent C(2) and eight equivalent C(1) atoms to form edge-sharing KC12 cuboctahedra. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to two equivalent K(1), one C(1), and two equivalent C(2) atoms. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one K(1), one C(2), and two equivalent C(1) atoms. is represented by the CIF file [CIF]
data_KC8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.955
_cell_length_b   4.955
_cell_length_c   10.817
_cell_angle_alpha   96.553
_cell_angle_beta   96.553
_cell_angle_gamma   119.990
_symmetry_Int_Tables_number   1
_cell_volume   223.968
_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  0.875  0.125  0.250  1.0
  K  K1  1  0.125  0.875  0.750  1.0
  C  C2  1  0.084  0.168  0.000  1.0
  C  C3  1  0.168  0.584  0.500  1.0
  C  C4  1  0.832  0.916  0.500  1.0
  C  C5  1  0.416  0.832  0.000  1.0
  C  C6  1  0.916  0.832  1.000  1.0
  C  C7  1  0.832  0.416  0.500  1.0
  C  C8  1  0.168  0.084  0.500  1.0
  C  C9  1  0.584  0.168  1.000  1.0
  C  C10  1  0.583  0.666  0.998  1.0
  C  C11  1  0.669  0.085  0.502  1.0
  C  C12  1  0.334  0.417  0.502  1.0
  C  C13  1  0.915  0.331  0.998  1.0
  C  C14  1  0.417  0.334  0.002  1.0
  C  C15  1  0.331  0.915  0.498  1.0
  C  C16  1  0.666  0.583  0.498  1.0
  C  C17  1  0.085  0.669  0.002  1.0
[/CIF]
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The crystal structure described by KC8 crystallizes in the orthorhombic Fddd space group. K(1) is bonded to four equivalent C(2) and eight equivalent C(1) atoms to form edge-sharing KC12 cuboctahedra. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to two equivalent K(1), one C(1), and two equivalent C(2) atoms. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one K(1), one C(2), and two equivalent C(1) atoms. is represented by the CIF file [CIF]
data_KC8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.955
_cell_length_b   4.955
_cell_length_c   10.817
_cell_angle_alpha   96.553
_cell_angle_beta   96.553
_cell_angle_gamma   119.990
_symmetry_Int_Tables_number   1
_cell_volume   223.968
_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  0.875  0.125  0.250  1.0
  K  K1  1  0.125  0.875  0.750  1.0
  C  C2  1  0.084  0.168  0.000  1.0
  C  C3  1  0.168  0.584  0.500  1.0
  C  C4  1  0.832  0.916  0.500  1.0
  C  C5  1  0.416  0.832  0.000  1.0
  C  C6  1  0.916  0.832  1.000  1.0
  C  C7  1  0.832  0.416  0.500  1.0
  C  C8  1  0.168  0.084  0.500  1.0
  C  C9  1  0.584  0.168  1.000  1.0
  C  C10  1  0.583  0.666  0.998  1.0
  C  C11  1  0.669  0.085  0.502  1.0
  C  C12  1  0.334  0.417  0.502  1.0
  C  C13  1  0.915  0.331  0.998  1.0
  C  C14  1  0.417  0.334  0.002  1.0
  C  C15  1  0.331  0.915  0.498  1.0
  C  C16  1  0.666  0.583  0.498  1.0
  C  C17  1  0.085  0.669  0.002  1.0
[/CIF]
.