The structure described by K2CO3 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. In the second K site, K(2) is bonded to six equivalent O(1) atoms to form face-sharing KO6 octahedra. C(1) is bonded in a trigonal planar geometry to three equivalent O(1) atoms. O(1) 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 card [CIF]
data_K2CO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.742
_cell_length_b   5.742
_cell_length_c   6.816
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   194.624
_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  0.667  0.333  0.750  1.0
  K  K1  1  0.333  0.667  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  0.333  0.667  0.750  1.0
  C  C5  1  0.667  0.333  0.250  1.0
  O  O6  1  0.594  0.797  0.750  1.0
  O  O7  1  0.406  0.203  0.250  1.0
  O  O8  1  0.797  0.594  0.250  1.0
  O  O9  1  0.203  0.797  0.750  1.0
  O  O10  1  0.203  0.406  0.750  1.0
  O  O11  1  0.797  0.203  0.250  1.0
[/CIF]
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The structure described by K2CO3 crystallizes in the hexagonal P6_3/mmc space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to six equivalent O(1) atoms. In the second K site, K(2) is bonded to six equivalent O(1) atoms to form face-sharing KO6 octahedra. C(1) is bonded in a trigonal planar geometry to three equivalent O(1) atoms. O(1) 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 card [CIF]
data_K2CO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.742
_cell_length_b   5.742
_cell_length_c   6.816
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   194.624
_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  0.667  0.333  0.750  1.0
  K  K1  1  0.333  0.667  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  0.333  0.667  0.750  1.0
  C  C5  1  0.667  0.333  0.250  1.0
  O  O6  1  0.594  0.797  0.750  1.0
  O  O7  1  0.406  0.203  0.250  1.0
  O  O8  1  0.797  0.594  0.250  1.0
  O  O9  1  0.203  0.797  0.750  1.0
  O  O10  1  0.203  0.406  0.750  1.0
  O  O11  1  0.797  0.203  0.250  1.0
[/CIF]
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