The material structure described by KNO3 crystallizes in the orthorhombic Pnma space group. K(1) is bonded to three equivalent O(1) and four equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing KO7 pentagonal bipyramids. N(1) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to three equivalent K(1) and one N(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1) and one N(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_KNO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.602
_cell_length_b   6.405
_cell_length_c   9.268
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   332.569
_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  0.250  0.136  0.390  1.0
  K  K1  1  0.750  0.364  0.890  1.0
  K  K2  1  0.250  0.636  0.110  1.0
  K  K3  1  0.750  0.864  0.610  1.0
  N  N4  1  0.750  0.885  0.134  1.0
  N  N5  1  0.250  0.615  0.634  1.0
  N  N6  1  0.250  0.115  0.866  1.0
  N  N7  1  0.750  0.385  0.366  1.0
  O  O8  1  0.250  0.774  0.552  1.0
  O  O9  1  0.554  0.464  0.326  1.0
  O  O10  1  0.446  0.536  0.674  1.0
  O  O11  1  0.946  0.464  0.326  1.0
  O  O12  1  0.446  0.036  0.826  1.0
  O  O13  1  0.054  0.036  0.826  1.0
  O  O14  1  0.054  0.536  0.674  1.0
  O  O15  1  0.554  0.964  0.174  1.0
  O  O16  1  0.250  0.274  0.948  1.0
  O  O17  1  0.750  0.226  0.448  1.0
  O  O18  1  0.750  0.726  0.052  1.0
  O  O19  1  0.946  0.964  0.174  1.0
[/CIF]
.
The material structure described by KNO3 crystallizes in the orthorhombic Pnma space group. K(1) is bonded to three equivalent O(1) and four equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing KO7 pentagonal bipyramids. N(1) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to three equivalent K(1) and one N(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1) and one N(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_KNO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.602
_cell_length_b   6.405
_cell_length_c   9.268
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   332.569
_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  0.250  0.136  0.390  1.0
  K  K1  1  0.750  0.364  0.890  1.0
  K  K2  1  0.250  0.636  0.110  1.0
  K  K3  1  0.750  0.864  0.610  1.0
  N  N4  1  0.750  0.885  0.134  1.0
  N  N5  1  0.250  0.615  0.634  1.0
  N  N6  1  0.250  0.115  0.866  1.0
  N  N7  1  0.750  0.385  0.366  1.0
  O  O8  1  0.250  0.774  0.552  1.0
  O  O9  1  0.554  0.464  0.326  1.0
  O  O10  1  0.446  0.536  0.674  1.0
  O  O11  1  0.946  0.464  0.326  1.0
  O  O12  1  0.446  0.036  0.826  1.0
  O  O13  1  0.054  0.036  0.826  1.0
  O  O14  1  0.054  0.536  0.674  1.0
  O  O15  1  0.554  0.964  0.174  1.0
  O  O16  1  0.250  0.274  0.948  1.0
  O  O17  1  0.750  0.226  0.448  1.0
  O  O18  1  0.750  0.726  0.052  1.0
  O  O19  1  0.946  0.964  0.174  1.0
[/CIF]
.