The crystal structure described by KH2PO4 crystallizes in the monoclinic Pc space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(6), one O(7), and one O(8) atom. In the second K site, K(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(7), one O(8), and two equivalent O(5) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one O(1), one O(3), one O(5), and one O(7) atom. In the second P site, P(2) is bonded in a tetrahedral geometry to one O(2), one O(4), one O(6), and one O(8) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(1) and one O(7) atom. In the second H site, H(2) is bonded in a linear geometry to one O(2) and one O(8) atom. In the third H site, H(3) is bonded in a linear geometry to one O(3) and one O(4) atom. In the fourth H site, H(4) is bonded in a linear geometry to one O(5) and one O(6) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one P(1), and one H(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one P(2), and one H(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one K(2), one P(1), and one H(3) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one P(2), and one H(3) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to two equivalent K(2), one P(1), and one H(4) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(2), and one H(4) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one P(1), and one H(1) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one P(2), and one H(2) atom. is represented by the CIF file [CIF]
data_KP(HO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.552
_cell_length_b   6.206
_cell_length_c   14.545
_cell_angle_alpha   91.765
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   410.762
_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  0.999  0.235  0.866  1.0
  K  K1  1  0.472  0.759  0.632  1.0
  K  K2  1  0.028  0.759  0.132  1.0
  K  K3  1  0.501  0.235  0.366  1.0
  P  P4  1  0.953  0.266  0.628  1.0
  P  P5  1  0.457  0.751  0.873  1.0
  P  P6  1  0.043  0.751  0.373  1.0
  P  P7  1  0.547  0.266  0.128  1.0
  H  H8  1  0.484  0.259  0.688  1.0
  H  H9  1  0.987  0.748  0.813  1.0
  H  H10  1  0.513  0.748  0.313  1.0
  H  H11  1  0.016  0.259  0.188  1.0
  H  H12  1  0.960  0.017  0.510  1.0
  H  H13  1  0.540  0.017  0.010  1.0
  H  H14  1  0.519  0.511  0.987  1.0
  H  H15  1  0.981  0.511  0.487  1.0
  O  O16  1  0.691  0.334  0.694  1.0
  O  O17  1  0.194  0.669  0.809  1.0
  O  O18  1  0.306  0.669  0.309  1.0
  O  O19  1  0.809  0.334  0.194  1.0
  O  O20  1  0.812  0.096  0.556  1.0
  O  O21  1  0.340  0.910  0.947  1.0
  O  O22  1  0.160  0.910  0.447  1.0
  O  O23  1  0.688  0.096  0.056  1.0
  O  O24  1  0.058  0.466  0.579  1.0
  O  O25  1  0.583  0.540  0.918  1.0
  O  O26  1  0.917  0.540  0.418  1.0
  O  O27  1  0.442  0.466  0.079  1.0
  O  O28  1  0.195  0.162  0.684  1.0
  O  O29  1  0.699  0.841  0.812  1.0
  O  O30  1  0.801  0.841  0.312  1.0
  O  O31  1  0.305  0.162  0.184  1.0
[/CIF]
.
The crystal structure described by KH2PO4 crystallizes in the monoclinic Pc space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(6), one O(7), and one O(8) atom. In the second K site, K(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(7), one O(8), and two equivalent O(5) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded in a tetrahedral geometry to one O(1), one O(3), one O(5), and one O(7) atom. In the second P site, P(2) is bonded in a tetrahedral geometry to one O(2), one O(4), one O(6), and one O(8) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(1) and one O(7) atom. In the second H site, H(2) is bonded in a linear geometry to one O(2) and one O(8) atom. In the third H site, H(3) is bonded in a linear geometry to one O(3) and one O(4) atom. In the fourth H site, H(4) is bonded in a linear geometry to one O(5) and one O(6) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one P(1), and one H(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one P(2), and one H(2) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one K(2), one P(1), and one H(3) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one P(2), and one H(3) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to two equivalent K(2), one P(1), and one H(4) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(2), and one H(4) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one P(1), and one H(1) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one P(2), and one H(2) atom. is represented by the CIF file [CIF]
data_KP(HO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.552
_cell_length_b   6.206
_cell_length_c   14.545
_cell_angle_alpha   91.765
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   410.762
_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  0.999  0.235  0.866  1.0
  K  K1  1  0.472  0.759  0.632  1.0
  K  K2  1  0.028  0.759  0.132  1.0
  K  K3  1  0.501  0.235  0.366  1.0
  P  P4  1  0.953  0.266  0.628  1.0
  P  P5  1  0.457  0.751  0.873  1.0
  P  P6  1  0.043  0.751  0.373  1.0
  P  P7  1  0.547  0.266  0.128  1.0
  H  H8  1  0.484  0.259  0.688  1.0
  H  H9  1  0.987  0.748  0.813  1.0
  H  H10  1  0.513  0.748  0.313  1.0
  H  H11  1  0.016  0.259  0.188  1.0
  H  H12  1  0.960  0.017  0.510  1.0
  H  H13  1  0.540  0.017  0.010  1.0
  H  H14  1  0.519  0.511  0.987  1.0
  H  H15  1  0.981  0.511  0.487  1.0
  O  O16  1  0.691  0.334  0.694  1.0
  O  O17  1  0.194  0.669  0.809  1.0
  O  O18  1  0.306  0.669  0.309  1.0
  O  O19  1  0.809  0.334  0.194  1.0
  O  O20  1  0.812  0.096  0.556  1.0
  O  O21  1  0.340  0.910  0.947  1.0
  O  O22  1  0.160  0.910  0.447  1.0
  O  O23  1  0.688  0.096  0.056  1.0
  O  O24  1  0.058  0.466  0.579  1.0
  O  O25  1  0.583  0.540  0.918  1.0
  O  O26  1  0.917  0.540  0.418  1.0
  O  O27  1  0.442  0.466  0.079  1.0
  O  O28  1  0.195  0.162  0.684  1.0
  O  O29  1  0.699  0.841  0.812  1.0
  O  O30  1  0.801  0.841  0.312  1.0
  O  O31  1  0.305  0.162  0.184  1.0
[/CIF]
.