The material described by KAl(PO3)4 crystallizes in the monoclinic C2/m space group. K(1) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), and six equivalent O(5) atoms. Al(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form AlO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra and corners with four equivalent P(1)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(3), one O(4), and one O(7) atom to form PO4 tetrahedra that share corners with two equivalent Al(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-45°. In the second P site, P(2) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Al(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 41°. There are seven inequivalent O sites. In the first O site, O(3) is bonded in a distorted bent 150 degrees geometry to one K(1), one Al(1), and one P(1) atom. In the second O site, O(4) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the third O site, O(5) is bonded in a distorted single-bond geometry to three equivalent K(1) and one P(2) atom. In the fourth O site, O(6) is bonded in a bent 120 degrees geometry to two equivalent P(2) atoms. In the fifth O site, O(7) is bonded in a bent 150 degrees geometry to two equivalent P(1) atoms. In the sixth O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Al(1) and one P(1) atom. In the seventh O site, O(2) is bonded in a distorted bent 150 degrees geometry to one K(1), one Al(1), and one P(2) atom. is represented by the CIF file [CIF]
data_KAl(PO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.458
_cell_length_b   10.458
_cell_length_c   5.144
_cell_angle_alpha   81.590
_cell_angle_beta   81.590
_cell_angle_gamma   72.650
_symmetry_Int_Tables_number   1
_cell_volume   528.125
_cell_formula_units_Z   2
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  0.407  0.407  0.747  1.0
  K  K1  1  0.593  0.593  0.253  1.0
  Al  Al2  1  0.000  0.500  0.000  1.0
  Al  Al3  1  0.500  0.000  0.000  1.0
  P  P4  1  0.069  0.312  0.532  1.0
  P  P5  1  0.312  0.069  0.532  1.0
  P  P6  1  0.931  0.688  0.468  1.0
  P  P7  1  0.688  0.931  0.468  1.0
  P  P8  1  0.802  0.354  0.836  1.0
  P  P9  1  0.354  0.802  0.836  1.0
  P  P10  1  0.198  0.646  0.164  1.0
  P  P11  1  0.646  0.198  0.164  1.0
  O  O12  1  0.913  0.649  0.761  1.0
  O  O13  1  0.649  0.913  0.761  1.0
  O  O14  1  0.087  0.351  0.239  1.0
  O  O15  1  0.351  0.087  0.239  1.0
  O  O16  1  0.858  0.424  0.012  1.0
  O  O17  1  0.424  0.858  0.012  1.0
  O  O18  1  0.142  0.576  0.988  1.0
  O  O19  1  0.576  0.142  0.988  1.0
  O  O20  1  0.096  0.402  0.708  1.0
  O  O21  1  0.402  0.096  0.708  1.0
  O  O22  1  0.904  0.598  0.292  1.0
  O  O23  1  0.598  0.904  0.292  1.0
  O  O24  1  0.923  0.290  0.615  1.0
  O  O25  1  0.290  0.923  0.615  1.0
  O  O26  1  0.077  0.710  0.385  1.0
  O  O27  1  0.710  0.077  0.385  1.0
  O  O28  1  0.679  0.432  0.713  1.0
  O  O29  1  0.432  0.679  0.713  1.0
  O  O30  1  0.321  0.568  0.287  1.0
  O  O31  1  0.568  0.321  0.287  1.0
  O  O32  1  0.786  0.214  0.000  1.0
  O  O33  1  0.214  0.786  0.000  1.0
  O  O34  1  0.161  0.161  0.598  1.0
  O  O35  1  0.839  0.839  0.402  1.0
[/CIF]
.
The material described by KAl(PO3)4 crystallizes in the monoclinic C2/m space group. K(1) is bonded in a 10-coordinate geometry to two equivalent O(2), two equivalent O(3), and six equivalent O(5) atoms. Al(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form AlO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra and corners with four equivalent P(1)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(3), one O(4), and one O(7) atom to form PO4 tetrahedra that share corners with two equivalent Al(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-45°. In the second P site, P(2) is bonded to one O(2), one O(4), one O(5), and one O(6) atom to form PO4 tetrahedra that share  a cornercorner with one Al(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 41°. There are seven inequivalent O sites. In the first O site, O(3) is bonded in a distorted bent 150 degrees geometry to one K(1), one Al(1), and one P(1) atom. In the second O site, O(4) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the third O site, O(5) is bonded in a distorted single-bond geometry to three equivalent K(1) and one P(2) atom. In the fourth O site, O(6) is bonded in a bent 120 degrees geometry to two equivalent P(2) atoms. In the fifth O site, O(7) is bonded in a bent 150 degrees geometry to two equivalent P(1) atoms. In the sixth O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Al(1) and one P(1) atom. In the seventh O site, O(2) is bonded in a distorted bent 150 degrees geometry to one K(1), one Al(1), and one P(2) atom. is represented by the CIF file [CIF]
data_KAl(PO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.458
_cell_length_b   10.458
_cell_length_c   5.144
_cell_angle_alpha   81.590
_cell_angle_beta   81.590
_cell_angle_gamma   72.650
_symmetry_Int_Tables_number   1
_cell_volume   528.125
_cell_formula_units_Z   2
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  0.407  0.407  0.747  1.0
  K  K1  1  0.593  0.593  0.253  1.0
  Al  Al2  1  0.000  0.500  0.000  1.0
  Al  Al3  1  0.500  0.000  0.000  1.0
  P  P4  1  0.069  0.312  0.532  1.0
  P  P5  1  0.312  0.069  0.532  1.0
  P  P6  1  0.931  0.688  0.468  1.0
  P  P7  1  0.688  0.931  0.468  1.0
  P  P8  1  0.802  0.354  0.836  1.0
  P  P9  1  0.354  0.802  0.836  1.0
  P  P10  1  0.198  0.646  0.164  1.0
  P  P11  1  0.646  0.198  0.164  1.0
  O  O12  1  0.913  0.649  0.761  1.0
  O  O13  1  0.649  0.913  0.761  1.0
  O  O14  1  0.087  0.351  0.239  1.0
  O  O15  1  0.351  0.087  0.239  1.0
  O  O16  1  0.858  0.424  0.012  1.0
  O  O17  1  0.424  0.858  0.012  1.0
  O  O18  1  0.142  0.576  0.988  1.0
  O  O19  1  0.576  0.142  0.988  1.0
  O  O20  1  0.096  0.402  0.708  1.0
  O  O21  1  0.402  0.096  0.708  1.0
  O  O22  1  0.904  0.598  0.292  1.0
  O  O23  1  0.598  0.904  0.292  1.0
  O  O24  1  0.923  0.290  0.615  1.0
  O  O25  1  0.290  0.923  0.615  1.0
  O  O26  1  0.077  0.710  0.385  1.0
  O  O27  1  0.710  0.077  0.385  1.0
  O  O28  1  0.679  0.432  0.713  1.0
  O  O29  1  0.432  0.679  0.713  1.0
  O  O30  1  0.321  0.568  0.287  1.0
  O  O31  1  0.568  0.321  0.287  1.0
  O  O32  1  0.786  0.214  0.000  1.0
  O  O33  1  0.214  0.786  0.000  1.0
  O  O34  1  0.161  0.161  0.598  1.0
  O  O35  1  0.839  0.839  0.402  1.0
[/CIF]
.