The structure described by KHCO3 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. H(1) is bonded in a linear geometry to one O(1) and one O(2) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to two equivalent K(1), one C(1), and one H(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent K(1), one C(1), and one H(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to four equivalent K(1) and one C(1) atom. is represented by the CIF file [CIF]
data_KHCO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.781
_cell_length_b   5.710
_cell_length_c   8.088
_cell_angle_alpha   109.777
_cell_angle_beta   102.612
_cell_angle_gamma   89.980
_symmetry_Int_Tables_number   1
_cell_volume   159.806
_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  0.965  0.832  0.670  1.0
  K  K1  1  0.035  0.168  0.330  1.0
  H  H2  1  0.516  0.299  0.965  1.0
  H  H3  1  0.484  0.701  0.035  1.0
  C  C4  1  0.616  0.389  0.762  1.0
  C  C5  1  0.384  0.611  0.238  1.0
  O  O6  1  0.569  0.216  0.840  1.0
  O  O7  1  0.566  0.616  0.844  1.0
  O  O8  1  0.431  0.784  0.160  1.0
  O  O9  1  0.434  0.384  0.156  1.0
  O  O10  1  0.709  0.305  0.613  1.0
  O  O11  1  0.291  0.695  0.387  1.0
[/CIF]
.
The structure described by KHCO3 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. H(1) is bonded in a linear geometry to one O(1) and one O(2) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to two equivalent K(1), one C(1), and one H(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent K(1), one C(1), and one H(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to four equivalent K(1) and one C(1) atom. is represented by the CIF file [CIF]
data_KHCO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.781
_cell_length_b   5.710
_cell_length_c   8.088
_cell_angle_alpha   109.777
_cell_angle_beta   102.612
_cell_angle_gamma   89.980
_symmetry_Int_Tables_number   1
_cell_volume   159.806
_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  0.965  0.832  0.670  1.0
  K  K1  1  0.035  0.168  0.330  1.0
  H  H2  1  0.516  0.299  0.965  1.0
  H  H3  1  0.484  0.701  0.035  1.0
  C  C4  1  0.616  0.389  0.762  1.0
  C  C5  1  0.384  0.611  0.238  1.0
  O  O6  1  0.569  0.216  0.840  1.0
  O  O7  1  0.566  0.616  0.844  1.0
  O  O8  1  0.431  0.784  0.160  1.0
  O  O9  1  0.434  0.384  0.156  1.0
  O  O10  1  0.709  0.305  0.613  1.0
  O  O11  1  0.291  0.695  0.387  1.0
[/CIF]
.