The material described by K3PO4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to two equivalent O(1), two equivalent O(3), and three equivalent O(2) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to one O(1), one O(3), and four equivalent O(2) atoms. P(1) is bonded in a tetrahedral geometry to one O(1), one O(3), and two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one K(2), four equivalent K(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(2), three equivalent K(1), and one P(1) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one K(2), four equivalent K(1), and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K3PO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.935
_cell_length_b   8.059
_cell_length_c   11.182
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   534.864
_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  0.805  0.493  0.644  1.0
  K  K1  1  0.195  0.993  0.356  1.0
  K  K2  1  0.305  0.507  0.856  1.0
  K  K3  1  0.135  0.250  0.069  1.0
  K  K4  1  0.635  0.750  0.431  1.0
  K  K5  1  0.865  0.750  0.931  1.0
  K  K6  1  0.305  0.993  0.856  1.0
  K  K7  1  0.365  0.250  0.569  1.0
  K  K8  1  0.695  0.493  0.144  1.0
  K  K9  1  0.195  0.507  0.356  1.0
  K  K10  1  0.805  0.007  0.644  1.0
  K  K11  1  0.695  0.007  0.144  1.0
  P  P12  1  0.782  0.250  0.385  1.0
  P  P13  1  0.718  0.250  0.885  1.0
  P  P14  1  0.218  0.750  0.615  1.0
  P  P15  1  0.282  0.750  0.115  1.0
  O  O16  1  0.052  0.750  0.508  1.0
  O  O17  1  0.634  0.092  0.390  1.0
  O  O18  1  0.134  0.908  0.110  1.0
  O  O19  1  0.866  0.408  0.890  1.0
  O  O20  1  0.134  0.592  0.110  1.0
  O  O21  1  0.578  0.250  0.768  1.0
  O  O22  1  0.366  0.908  0.610  1.0
  O  O23  1  0.448  0.750  0.008  1.0
  O  O24  1  0.634  0.408  0.390  1.0
  O  O25  1  0.922  0.250  0.268  1.0
  O  O26  1  0.552  0.250  0.992  1.0
  O  O27  1  0.866  0.092  0.890  1.0
  O  O28  1  0.366  0.592  0.610  1.0
  O  O29  1  0.948  0.250  0.492  1.0
  O  O30  1  0.078  0.750  0.732  1.0
  O  O31  1  0.422  0.750  0.232  1.0
[/CIF]
.
The material described by K3PO4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to two equivalent O(1), two equivalent O(3), and three equivalent O(2) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to one O(1), one O(3), and four equivalent O(2) atoms. P(1) is bonded in a tetrahedral geometry to one O(1), one O(3), and two equivalent O(2) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one K(2), four equivalent K(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(2), three equivalent K(1), and one P(1) atom. In the third O site, O(3) is bonded in a 6-coordinate geometry to one K(2), four equivalent K(1), and one P(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K3PO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.935
_cell_length_b   8.059
_cell_length_c   11.182
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   534.864
_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  0.805  0.493  0.644  1.0
  K  K1  1  0.195  0.993  0.356  1.0
  K  K2  1  0.305  0.507  0.856  1.0
  K  K3  1  0.135  0.250  0.069  1.0
  K  K4  1  0.635  0.750  0.431  1.0
  K  K5  1  0.865  0.750  0.931  1.0
  K  K6  1  0.305  0.993  0.856  1.0
  K  K7  1  0.365  0.250  0.569  1.0
  K  K8  1  0.695  0.493  0.144  1.0
  K  K9  1  0.195  0.507  0.356  1.0
  K  K10  1  0.805  0.007  0.644  1.0
  K  K11  1  0.695  0.007  0.144  1.0
  P  P12  1  0.782  0.250  0.385  1.0
  P  P13  1  0.718  0.250  0.885  1.0
  P  P14  1  0.218  0.750  0.615  1.0
  P  P15  1  0.282  0.750  0.115  1.0
  O  O16  1  0.052  0.750  0.508  1.0
  O  O17  1  0.634  0.092  0.390  1.0
  O  O18  1  0.134  0.908  0.110  1.0
  O  O19  1  0.866  0.408  0.890  1.0
  O  O20  1  0.134  0.592  0.110  1.0
  O  O21  1  0.578  0.250  0.768  1.0
  O  O22  1  0.366  0.908  0.610  1.0
  O  O23  1  0.448  0.750  0.008  1.0
  O  O24  1  0.634  0.408  0.390  1.0
  O  O25  1  0.922  0.250  0.268  1.0
  O  O26  1  0.552  0.250  0.992  1.0
  O  O27  1  0.866  0.092  0.890  1.0
  O  O28  1  0.366  0.592  0.610  1.0
  O  O29  1  0.948  0.250  0.492  1.0
  O  O30  1  0.078  0.750  0.732  1.0
  O  O31  1  0.422  0.750  0.232  1.0
[/CIF]
.