The material structure described by K2CO3 crystallizes in the monoclinic C2/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to two equivalent O(2) and six equivalent O(1) atoms. In the second K site, K(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form face-sharing KO6 octahedra. C(1) is bonded in a trigonal planar geometry to one O(2) and two equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(2), three equivalent K(1), and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1), two equivalent K(2), and one C(1) atom. is represented by the CIF file [CIF]
data_K2CO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.596
_cell_length_b   5.742
_cell_length_c   6.706
_cell_angle_alpha   84.656
_cell_angle_beta   78.980
_cell_angle_gamma   60.840
_symmetry_Int_Tables_number   1
_cell_volume   184.707
_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  0.665  0.669  0.750  1.0
  K  K1  1  0.335  0.331  0.250  1.0
  K  K2  1  0.000  0.000  0.500  1.0
  K  K3  1  0.000  0.000  0.000  1.0
  C  C4  1  0.668  0.665  0.250  1.0
  C  C5  1  0.332  0.335  0.750  1.0
  O  O6  1  0.224  0.207  0.687  1.0
  O  O7  1  0.203  0.594  0.750  1.0
  O  O8  1  0.797  0.406  0.250  1.0
  O  O9  1  0.776  0.793  0.313  1.0
  O  O10  1  0.569  0.207  0.813  1.0
  O  O11  1  0.431  0.793  0.187  1.0
[/CIF]
.
The material structure described by K2CO3 crystallizes in the monoclinic C2/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to two equivalent O(2) and six equivalent O(1) atoms. In the second K site, K(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form face-sharing KO6 octahedra. C(1) is bonded in a trigonal planar geometry to one O(2) and two equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(2), three equivalent K(1), and one C(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1), two equivalent K(2), and one C(1) atom. is represented by the CIF file [CIF]
data_K2CO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.596
_cell_length_b   5.742
_cell_length_c   6.706
_cell_angle_alpha   84.656
_cell_angle_beta   78.980
_cell_angle_gamma   60.840
_symmetry_Int_Tables_number   1
_cell_volume   184.707
_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  0.665  0.669  0.750  1.0
  K  K1  1  0.335  0.331  0.250  1.0
  K  K2  1  0.000  0.000  0.500  1.0
  K  K3  1  0.000  0.000  0.000  1.0
  C  C4  1  0.668  0.665  0.250  1.0
  C  C5  1  0.332  0.335  0.750  1.0
  O  O6  1  0.224  0.207  0.687  1.0
  O  O7  1  0.203  0.594  0.750  1.0
  O  O8  1  0.797  0.406  0.250  1.0
  O  O9  1  0.776  0.793  0.313  1.0
  O  O10  1  0.569  0.207  0.813  1.0
  O  O11  1  0.431  0.793  0.187  1.0
[/CIF]
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