The compound described by KAl9O14 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(6), and two equivalent O(7) atoms. There are five inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(3), one O(4), one O(6), and two equivalent O(5) atoms to form AlO6 octahedra that share corners with two equivalent Al(4)O4 tetrahedra, corners with three equivalent Al(3)O4 tetrahedra,  a cornercorner with one Al(5)O5 trigonal bipyramid,  an edgeedge with one Al(1)O6 octahedra,  an edgeedge with one Al(2)O6 octahedra, and edges with two equivalent Al(5)O5 trigonal bipyramids. In the second Al site, Al(2) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form AlO6 octahedra that share corners with two equivalent Al(3)O4 tetrahedra, corners with four equivalent Al(4)O4 tetrahedra, corners with two equivalent Al(5)O5 trigonal bipyramids, and edges with two equivalent Al(1)O6 octahedra. In the third Al site, Al(3) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form AlO4 tetrahedra that share  a cornercorner with one Al(2)O6 octahedra, corners with three equivalent Al(1)O6 octahedra, corners with two equivalent Al(4)O4 tetrahedra,  a cornercorner with one Al(5)O5 trigonal bipyramid, and  an edgeedge with one Al(5)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 51-60°. In the fourth Al site, Al(4) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form AlO4 tetrahedra that share corners with two equivalent Al(1)O6 octahedra, corners with two equivalent Al(2)O6 octahedra, corners with two equivalent Al(3)O4 tetrahedra, and corners with two equivalent Al(5)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 50-65°. In the fifth Al site, Al(5) is bonded to one O(1), one O(3), one O(5), one O(6), and one O(7) atom to form distorted AlO5 trigonal bipyramids that share  a cornercorner with one Al(1)O6 octahedra,  a cornercorner with one Al(2)O6 octahedra,  a cornercorner with one Al(3)O4 tetrahedra, corners with two equivalent Al(4)O4 tetrahedra, edges with two equivalent Al(1)O6 octahedra, and  an edgeedge with one Al(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 53-54°. There are seven inequivalent O sites. In the first O site, O(4) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(2), and one Al(4) atom. In the second O site, O(5) is bonded to one Al(3), one Al(5), and two equivalent Al(1) atoms to form edge-sharing OAl4 trigonal pyramids. In the third O site, O(6) is bonded in a 3-coordinate geometry to one K(1), one Al(1), one Al(2), and one Al(5) atom. In the fourth O site, O(7) is bonded in a 3-coordinate geometry to one K(1), one Al(3), one Al(4), and one Al(5) atom. In the fifth O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one Al(1), one Al(4), and one Al(5) atom. In the sixth O site, O(2) is bonded in a trigonal planar geometry to one Al(2), one Al(3), and one Al(4) atom. In the seventh O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one Al(1), one Al(3), and one Al(5) atom. is represented by the CIF file [CIF]
data_KAl9O14
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.757
_cell_length_b   8.278
_cell_length_c   9.790
_cell_angle_alpha   58.269
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   534.649
_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  0.500  0.500  0.500  1.0
  K  K1  1  0.000  0.500  0.000  1.0
  Al  Al2  1  0.998  0.326  0.671  1.0
  Al  Al3  1  0.502  0.326  0.171  1.0
  Al  Al4  1  0.002  0.674  0.329  1.0
  Al  Al5  1  0.498  0.674  0.829  1.0
  Al  Al6  1  0.000  0.000  0.000  1.0
  Al  Al7  1  0.500  0.000  0.500  1.0
  Al  Al8  1  0.666  0.729  0.122  1.0
  Al  Al9  1  0.834  0.729  0.622  1.0
  Al  Al10  1  0.334  0.271  0.878  1.0
  Al  Al11  1  0.166  0.271  0.378  1.0
  Al  Al12  1  0.177  0.934  0.722  1.0
  Al  Al13  1  0.323  0.934  0.222  1.0
  Al  Al14  1  0.823  0.066  0.278  1.0
  Al  Al15  1  0.677  0.066  0.778  1.0
  Al  Al16  1  0.811  0.324  0.407  1.0
  Al  Al17  1  0.689  0.324  0.907  1.0
  Al  Al18  1  0.189  0.676  0.593  1.0
  Al  Al19  1  0.311  0.676  0.093  1.0
  O  O20  1  0.795  0.245  0.614  1.0
  O  O21  1  0.705  0.245  0.114  1.0
  O  O22  1  0.205  0.755  0.386  1.0
  O  O23  1  0.295  0.755  0.886  1.0
  O  O24  1  0.786  0.907  0.962  1.0
  O  O25  1  0.714  0.907  0.462  1.0
  O  O26  1  0.214  0.093  0.038  1.0
  O  O27  1  0.286  0.093  0.538  1.0
  O  O28  1  0.793  0.579  0.290  1.0
  O  O29  1  0.707  0.579  0.790  1.0
  O  O30  1  0.207  0.421  0.710  1.0
  O  O31  1  0.293  0.421  0.210  1.0
  O  O32  1  0.083  0.072  0.789  1.0
  O  O33  1  0.417  0.072  0.289  1.0
  O  O34  1  0.917  0.928  0.211  1.0
  O  O35  1  0.583  0.928  0.711  1.0
  O  O36  1  0.063  0.405  0.449  1.0
  O  O37  1  0.437  0.405  0.949  1.0
  O  O38  1  0.937  0.595  0.551  1.0
  O  O39  1  0.563  0.595  0.051  1.0
  O  O40  1  0.602  0.254  0.374  1.0
  O  O41  1  0.898  0.254  0.874  1.0
  O  O42  1  0.398  0.746  0.626  1.0
  O  O43  1  0.102  0.746  0.126  1.0
  O  O44  1  0.958  0.207  0.332  1.0
  O  O45  1  0.542  0.207  0.832  1.0
  O  O46  1  0.042  0.793  0.668  1.0
  O  O47  1  0.458  0.793  0.168  1.0
[/CIF]
.
The compound described by KAl9O14 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(6), and two equivalent O(7) atoms. There are five inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(3), one O(4), one O(6), and two equivalent O(5) atoms to form AlO6 octahedra that share corners with two equivalent Al(4)O4 tetrahedra, corners with three equivalent Al(3)O4 tetrahedra,  a cornercorner with one Al(5)O5 trigonal bipyramid,  an edgeedge with one Al(1)O6 octahedra,  an edgeedge with one Al(2)O6 octahedra, and edges with two equivalent Al(5)O5 trigonal bipyramids. In the second Al site, Al(2) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form AlO6 octahedra that share corners with two equivalent Al(3)O4 tetrahedra, corners with four equivalent Al(4)O4 tetrahedra, corners with two equivalent Al(5)O5 trigonal bipyramids, and edges with two equivalent Al(1)O6 octahedra. In the third Al site, Al(3) is bonded to one O(2), one O(3), one O(5), and one O(7) atom to form AlO4 tetrahedra that share  a cornercorner with one Al(2)O6 octahedra, corners with three equivalent Al(1)O6 octahedra, corners with two equivalent Al(4)O4 tetrahedra,  a cornercorner with one Al(5)O5 trigonal bipyramid, and  an edgeedge with one Al(5)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 51-60°. In the fourth Al site, Al(4) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form AlO4 tetrahedra that share corners with two equivalent Al(1)O6 octahedra, corners with two equivalent Al(2)O6 octahedra, corners with two equivalent Al(3)O4 tetrahedra, and corners with two equivalent Al(5)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 50-65°. In the fifth Al site, Al(5) is bonded to one O(1), one O(3), one O(5), one O(6), and one O(7) atom to form distorted AlO5 trigonal bipyramids that share  a cornercorner with one Al(1)O6 octahedra,  a cornercorner with one Al(2)O6 octahedra,  a cornercorner with one Al(3)O4 tetrahedra, corners with two equivalent Al(4)O4 tetrahedra, edges with two equivalent Al(1)O6 octahedra, and  an edgeedge with one Al(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 53-54°. There are seven inequivalent O sites. In the first O site, O(4) is bonded in a distorted trigonal planar geometry to one Al(1), one Al(2), and one Al(4) atom. In the second O site, O(5) is bonded to one Al(3), one Al(5), and two equivalent Al(1) atoms to form edge-sharing OAl4 trigonal pyramids. In the third O site, O(6) is bonded in a 3-coordinate geometry to one K(1), one Al(1), one Al(2), and one Al(5) atom. In the fourth O site, O(7) is bonded in a 3-coordinate geometry to one K(1), one Al(3), one Al(4), and one Al(5) atom. In the fifth O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one Al(1), one Al(4), and one Al(5) atom. In the sixth O site, O(2) is bonded in a trigonal planar geometry to one Al(2), one Al(3), and one Al(4) atom. In the seventh O site, O(3) is bonded in a 3-coordinate geometry to one K(1), one Al(1), one Al(3), and one Al(5) atom. is represented by the CIF file [CIF]
data_KAl9O14
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.757
_cell_length_b   8.278
_cell_length_c   9.790
_cell_angle_alpha   58.269
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   534.649
_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  0.500  0.500  0.500  1.0
  K  K1  1  0.000  0.500  0.000  1.0
  Al  Al2  1  0.998  0.326  0.671  1.0
  Al  Al3  1  0.502  0.326  0.171  1.0
  Al  Al4  1  0.002  0.674  0.329  1.0
  Al  Al5  1  0.498  0.674  0.829  1.0
  Al  Al6  1  0.000  0.000  0.000  1.0
  Al  Al7  1  0.500  0.000  0.500  1.0
  Al  Al8  1  0.666  0.729  0.122  1.0
  Al  Al9  1  0.834  0.729  0.622  1.0
  Al  Al10  1  0.334  0.271  0.878  1.0
  Al  Al11  1  0.166  0.271  0.378  1.0
  Al  Al12  1  0.177  0.934  0.722  1.0
  Al  Al13  1  0.323  0.934  0.222  1.0
  Al  Al14  1  0.823  0.066  0.278  1.0
  Al  Al15  1  0.677  0.066  0.778  1.0
  Al  Al16  1  0.811  0.324  0.407  1.0
  Al  Al17  1  0.689  0.324  0.907  1.0
  Al  Al18  1  0.189  0.676  0.593  1.0
  Al  Al19  1  0.311  0.676  0.093  1.0
  O  O20  1  0.795  0.245  0.614  1.0
  O  O21  1  0.705  0.245  0.114  1.0
  O  O22  1  0.205  0.755  0.386  1.0
  O  O23  1  0.295  0.755  0.886  1.0
  O  O24  1  0.786  0.907  0.962  1.0
  O  O25  1  0.714  0.907  0.462  1.0
  O  O26  1  0.214  0.093  0.038  1.0
  O  O27  1  0.286  0.093  0.538  1.0
  O  O28  1  0.793  0.579  0.290  1.0
  O  O29  1  0.707  0.579  0.790  1.0
  O  O30  1  0.207  0.421  0.710  1.0
  O  O31  1  0.293  0.421  0.210  1.0
  O  O32  1  0.083  0.072  0.789  1.0
  O  O33  1  0.417  0.072  0.289  1.0
  O  O34  1  0.917  0.928  0.211  1.0
  O  O35  1  0.583  0.928  0.711  1.0
  O  O36  1  0.063  0.405  0.449  1.0
  O  O37  1  0.437  0.405  0.949  1.0
  O  O38  1  0.937  0.595  0.551  1.0
  O  O39  1  0.563  0.595  0.051  1.0
  O  O40  1  0.602  0.254  0.374  1.0
  O  O41  1  0.898  0.254  0.874  1.0
  O  O42  1  0.398  0.746  0.626  1.0
  O  O43  1  0.102  0.746  0.126  1.0
  O  O44  1  0.958  0.207  0.332  1.0
  O  O45  1  0.542  0.207  0.832  1.0
  O  O46  1  0.042  0.793  0.668  1.0
  O  O47  1  0.458  0.793  0.168  1.0
[/CIF]
.