The crystal structure described by K4CO4 crystallizes in the monoclinic Cm space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), and two equivalent O(3) atoms. In the second K site, K(2) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(3) atoms. In the third K site, K(3) is bonded in a 4-coordinate geometry to one O(1), one O(2), and two equivalent O(3) atoms. C(1) is bonded in a tetrahedral geometry to one O(1), one O(2), and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one K(1), one K(2), two equivalent K(3), and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), two equivalent K(3), and one C(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one K(1), one K(2), two equivalent K(3), and one C(1) atom. is represented by the CIF file [CIF]
data_K4CO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.879
_cell_length_b   5.879
_cell_length_c   5.704
_cell_angle_alpha   81.103
_cell_angle_beta   81.103
_cell_angle_gamma   112.988
_symmetry_Int_Tables_number   1
_cell_volume   174.243
_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  0.330  0.330  0.750  1.0
  K  K1  1  0.799  0.799  0.958  1.0
  K  K2  1  0.126  0.594  0.316  1.0
  K  K3  1  0.594  0.126  0.316  1.0
  C  C4  1  0.989  0.989  0.455  1.0
  O  O5  1  0.130  0.130  0.208  1.0
  O  O6  1  0.767  0.767  0.446  1.0
  O  O7  1  0.148  0.910  0.581  1.0
  O  O8  1  0.910  0.148  0.581  1.0
[/CIF]
.
The crystal structure described by K4CO4 crystallizes in the monoclinic Cm space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), and two equivalent O(3) atoms. In the second K site, K(2) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(3) atoms. In the third K site, K(3) is bonded in a 4-coordinate geometry to one O(1), one O(2), and two equivalent O(3) atoms. C(1) is bonded in a tetrahedral geometry to one O(1), one O(2), and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one K(1), one K(2), two equivalent K(3), and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), two equivalent K(3), and one C(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one K(1), one K(2), two equivalent K(3), and one C(1) atom. is represented by the CIF file [CIF]
data_K4CO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.879
_cell_length_b   5.879
_cell_length_c   5.704
_cell_angle_alpha   81.103
_cell_angle_beta   81.103
_cell_angle_gamma   112.988
_symmetry_Int_Tables_number   1
_cell_volume   174.243
_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  0.330  0.330  0.750  1.0
  K  K1  1  0.799  0.799  0.958  1.0
  K  K2  1  0.126  0.594  0.316  1.0
  K  K3  1  0.594  0.126  0.316  1.0
  C  C4  1  0.989  0.989  0.455  1.0
  O  O5  1  0.130  0.130  0.208  1.0
  O  O6  1  0.767  0.767  0.446  1.0
  O  O7  1  0.148  0.910  0.581  1.0
  O  O8  1  0.910  0.148  0.581  1.0
[/CIF]
.