The crystal structure described by K4CO4 crystallizes in the monoclinic Cm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one O(1), one O(3), and two equivalent O(2) atoms. In the second K site, K(2) 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(3), and two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(1), two equivalent K(2), and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one C(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to two equivalent K(1), four equivalent K(2), 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   5.653
_cell_length_b   5.653
_cell_length_c   6.491
_cell_angle_alpha   72.451
_cell_angle_beta   72.451
_cell_angle_gamma   86.961
_symmetry_Int_Tables_number   1
_cell_volume   188.408
_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  0.027  0.564  0.098  1.0
  K  K1  1  0.931  0.427  0.626  1.0
  K  K2  1  0.427  0.931  0.626  1.0
  K  K3  1  0.564  0.027  0.098  1.0
  C  C4  1  0.019  0.019  0.413  1.0
  O  O5  1  0.206  0.206  0.361  1.0
  O  O6  1  0.825  0.125  0.325  1.0
  O  O7  1  0.916  0.916  0.667  1.0
  O  O8  1  0.125  0.825  0.325  1.0
[/CIF]
.
The crystal structure described by K4CO4 crystallizes in the monoclinic Cm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 4-coordinate geometry to one O(1), one O(3), and two equivalent O(2) atoms. In the second K site, K(2) 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(3), and two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(1), two equivalent K(2), and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one C(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to two equivalent K(1), four equivalent K(2), 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   5.653
_cell_length_b   5.653
_cell_length_c   6.491
_cell_angle_alpha   72.451
_cell_angle_beta   72.451
_cell_angle_gamma   86.961
_symmetry_Int_Tables_number   1
_cell_volume   188.408
_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  0.027  0.564  0.098  1.0
  K  K1  1  0.931  0.427  0.626  1.0
  K  K2  1  0.427  0.931  0.626  1.0
  K  K3  1  0.564  0.027  0.098  1.0
  C  C4  1  0.019  0.019  0.413  1.0
  O  O5  1  0.206  0.206  0.361  1.0
  O  O6  1  0.825  0.125  0.325  1.0
  O  O7  1  0.916  0.916  0.667  1.0
  O  O8  1  0.125  0.825  0.325  1.0
[/CIF]
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