The material structure described by KCNH3 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 10-coordinate geometry to four equivalent C(1), two equivalent N(1), one H(2), one H(3), and two equivalent H(1) atoms. C(1) is bonded in a 5-coordinate geometry to four equivalent K(1) and one C(1) atom. N(1) is bonded in a trigonal non-coplanar geometry to two equivalent K(1), one H(1), one H(2), and one H(3) atom. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to two equivalent K(1) and one N(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one K(1) and one N(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one K(1) and one N(1) atom. is represented by the CIF card [CIF]
data_KH3CN
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.259
_cell_length_b   5.664
_cell_length_c   8.643
_cell_angle_alpha   90.000
_cell_angle_beta   117.089
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   316.425
_cell_formula_units_Z   4
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  0.682  0.418  0.401  1.0
  K  K1  1  0.682  0.082  0.901  1.0
  K  K2  1  0.318  0.582  0.599  1.0
  K  K3  1  0.318  0.918  0.099  1.0
  H  H4  1  0.818  0.741  0.218  1.0
  H  H5  1  0.818  0.759  0.718  1.0
  H  H6  1  0.182  0.259  0.782  1.0
  H  H7  1  0.182  0.241  0.282  1.0
  H  H8  1  0.828  0.871  0.394  1.0
  H  H9  1  0.828  0.629  0.894  1.0
  H  H10  1  0.172  0.129  0.606  1.0
  H  H11  1  0.172  0.371  0.106  1.0
  H  H12  1  0.016  0.919  0.338  1.0
  H  H13  1  0.016  0.581  0.838  1.0
  H  H14  1  0.984  0.081  0.662  1.0
  H  H15  1  0.984  0.419  0.162  1.0
  C  C16  1  0.444  0.422  0.010  1.0
  C  C17  1  0.444  0.078  0.510  1.0
  C  C18  1  0.556  0.578  0.990  1.0
  C  C19  1  0.556  0.922  0.490  1.0
  N  N20  1  0.917  0.794  0.344  1.0
  N  N21  1  0.917  0.706  0.844  1.0
  N  N22  1  0.083  0.206  0.656  1.0
  N  N23  1  0.083  0.294  0.156  1.0
[/CIF]
.
The material structure described by KCNH3 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 10-coordinate geometry to four equivalent C(1), two equivalent N(1), one H(2), one H(3), and two equivalent H(1) atoms. C(1) is bonded in a 5-coordinate geometry to four equivalent K(1) and one C(1) atom. N(1) is bonded in a trigonal non-coplanar geometry to two equivalent K(1), one H(1), one H(2), and one H(3) atom. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to two equivalent K(1) and one N(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one K(1) and one N(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one K(1) and one N(1) atom. is represented by the CIF card [CIF]
data_KH3CN
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.259
_cell_length_b   5.664
_cell_length_c   8.643
_cell_angle_alpha   90.000
_cell_angle_beta   117.089
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   316.425
_cell_formula_units_Z   4
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  0.682  0.418  0.401  1.0
  K  K1  1  0.682  0.082  0.901  1.0
  K  K2  1  0.318  0.582  0.599  1.0
  K  K3  1  0.318  0.918  0.099  1.0
  H  H4  1  0.818  0.741  0.218  1.0
  H  H5  1  0.818  0.759  0.718  1.0
  H  H6  1  0.182  0.259  0.782  1.0
  H  H7  1  0.182  0.241  0.282  1.0
  H  H8  1  0.828  0.871  0.394  1.0
  H  H9  1  0.828  0.629  0.894  1.0
  H  H10  1  0.172  0.129  0.606  1.0
  H  H11  1  0.172  0.371  0.106  1.0
  H  H12  1  0.016  0.919  0.338  1.0
  H  H13  1  0.016  0.581  0.838  1.0
  H  H14  1  0.984  0.081  0.662  1.0
  H  H15  1  0.984  0.419  0.162  1.0
  C  C16  1  0.444  0.422  0.010  1.0
  C  C17  1  0.444  0.078  0.510  1.0
  C  C18  1  0.556  0.578  0.990  1.0
  C  C19  1  0.556  0.922  0.490  1.0
  N  N20  1  0.917  0.794  0.344  1.0
  N  N21  1  0.917  0.706  0.844  1.0
  N  N22  1  0.083  0.206  0.656  1.0
  N  N23  1  0.083  0.294  0.156  1.0
[/CIF]
.