The material structure described by KNO3 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded to two equivalent O(2), three equivalent O(1), and three equivalent O(3) atoms to form a mixture of distorted edge and corner-sharing KO8 hexagonal bipyramids. N(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are three 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 3-coordinate geometry to two equivalent K(1) and one N(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to three equivalent K(1) and one N(1) atom. is represented by the CIF file [CIF]
data_KNO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.324
_cell_length_b   4.498
_cell_length_c   13.716
_cell_angle_alpha   73.725
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   315.283
_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  0.854  0.594  0.623  1.0
  K  K1  1  0.354  0.406  0.877  1.0
  K  K2  1  0.146  0.406  0.377  1.0
  K  K3  1  0.646  0.594  0.123  1.0
  N  N4  1  0.360  0.005  0.617  1.0
  N  N5  1  0.860  0.995  0.883  1.0
  N  N6  1  0.640  0.995  0.383  1.0
  N  N7  1  0.140  0.005  0.117  1.0
  O  O8  1  0.153  0.136  0.586  1.0
  O  O9  1  0.653  0.864  0.914  1.0
  O  O10  1  0.847  0.864  0.414  1.0
  O  O11  1  0.347  0.136  0.086  1.0
  O  O12  1  0.564  0.136  0.587  1.0
  O  O13  1  0.064  0.864  0.913  1.0
  O  O14  1  0.436  0.864  0.413  1.0
  O  O15  1  0.936  0.136  0.087  1.0
  O  O16  1  0.859  0.265  0.822  1.0
  O  O17  1  0.359  0.735  0.678  1.0
  O  O18  1  0.141  0.735  0.178  1.0
  O  O19  1  0.641  0.265  0.322  1.0
[/CIF]
.
The material structure described by KNO3 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded to two equivalent O(2), three equivalent O(1), and three equivalent O(3) atoms to form a mixture of distorted edge and corner-sharing KO8 hexagonal bipyramids. N(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are three 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 3-coordinate geometry to two equivalent K(1) and one N(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to three equivalent K(1) and one N(1) atom. is represented by the CIF file [CIF]
data_KNO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.324
_cell_length_b   4.498
_cell_length_c   13.716
_cell_angle_alpha   73.725
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   315.283
_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  0.854  0.594  0.623  1.0
  K  K1  1  0.354  0.406  0.877  1.0
  K  K2  1  0.146  0.406  0.377  1.0
  K  K3  1  0.646  0.594  0.123  1.0
  N  N4  1  0.360  0.005  0.617  1.0
  N  N5  1  0.860  0.995  0.883  1.0
  N  N6  1  0.640  0.995  0.383  1.0
  N  N7  1  0.140  0.005  0.117  1.0
  O  O8  1  0.153  0.136  0.586  1.0
  O  O9  1  0.653  0.864  0.914  1.0
  O  O10  1  0.847  0.864  0.414  1.0
  O  O11  1  0.347  0.136  0.086  1.0
  O  O12  1  0.564  0.136  0.587  1.0
  O  O13  1  0.064  0.864  0.913  1.0
  O  O14  1  0.436  0.864  0.413  1.0
  O  O15  1  0.936  0.136  0.087  1.0
  O  O16  1  0.859  0.265  0.822  1.0
  O  O17  1  0.359  0.735  0.678  1.0
  O  O18  1  0.141  0.735  0.178  1.0
  O  O19  1  0.641  0.265  0.322  1.0
[/CIF]
.