The crystal structure described by K6Na3Ti2Al2Si8O26Cl3 is Esseneite-derived structured and crystallizes in the triclinic P-1 space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(4), one O(8), two equivalent O(6), one Cl(1), and one Cl(2) atom. In the second K site, K(2) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(7), one O(9), two equivalent O(5), one Cl(1), and one Cl(2) atom. In the third K site, K(3) is bonded in a 7-coordinate geometry to one O(1), one O(11), one O(2), one O(3), one O(4), one Cl(1), and one Cl(2) atom. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(10), one O(12), one O(13), one O(9), and two equivalent Cl(1) atoms to form distorted NaCl2O4 octahedra that share corners with two equivalent Na(2)Cl2O4 octahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  an edgeedge with one Na(1)Cl2O4 octahedra,  an edgeedge with one Ti(1)O6 octahedra, and  an edgeedge with one Ti(2)O6 octahedra. The corner-sharing octahedral tilt angles are 66°. In the second Na site, Na(2) is bonded to two equivalent O(7), two equivalent O(8), and two equivalent Cl(1) atoms to form distorted NaCl2O4 octahedra that share corners with four equivalent Na(1)Cl2O4 octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and edges with two equivalent Al(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 66°. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to two equivalent O(1), two equivalent O(10), and two equivalent O(13) atoms to form TiO6 octahedra that share corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra, and edges with two equivalent Na(1)Cl2O4 octahedra. In the second Ti site, Ti(2) is bonded to two equivalent O(12), two equivalent O(2), and two equivalent O(9) atoms to form TiO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra, and edges with two equivalent Na(1)Cl2O4 octahedra. Al(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form AlO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, and  an edgeedge with one Na(2)Cl2O4 octahedra. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(11), one O(12), one O(3), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(1)Cl2O4 octahedra,  a cornercorner with one Na(2)Cl2O4 octahedra,  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-68°. In the second Si site, Si(2) is bonded to one O(11), one O(13), one O(4), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(1)Cl2O4 octahedra,  a cornercorner with one Na(2)Cl2O4 octahedra,  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-68°. In the third Si site, Si(3) is bonded to one O(1), one O(3), one O(5), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(1)Cl2O4 octahedra,  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Al(1)O4 tetrahedra, and  a cornercorner with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-67°. In the fourth Si site, Si(4) is bonded to one O(10), one O(2), one O(4), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(1)Cl2O4 octahedra,  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Al(1)O4 tetrahedra, and  a cornercorner with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-67°. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one K(1), one K(3), one Ti(1), and one Si(3) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(2), one K(3), one Ti(2), and one Si(4) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one K(2), one K(3), one Si(1), and one Si(3) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(3), one Si(2), and one Si(4) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to two equivalent K(2), one Al(1), and one Si(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Al(1), and one Si(4) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one K(2), one Na(2), one Al(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one K(1), one Na(2), one Al(1), and one Si(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one K(2), one Na(1), one Ti(2), and one Si(3) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one K(1), one Na(1), one Ti(1), and one Si(4) atom. In the eleventh O site, O(11) is bonded in a distorted bent 150 degrees geometry to one K(3), one Si(1), and one Si(2) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Na(1), one Ti(2), and one Si(1) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Na(1), one Ti(1), and one Si(2) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to one K(1), one K(2), one K(3), one Na(2), and two equivalent Na(1) atoms to form distorted ClK3Na3 octahedra that share  a cornercorner with one Cl(1)K3Na3 octahedra,  an edgeedge with one Cl(1)K3Na3 octahedra, and  a faceface with one Cl(2)K6 octahedra. The corner-sharing octahedra are not tilted. In the second Cl site, Cl(2) is bonded to two equivalent K(1), two equivalent K(2), and two equivalent K(3) atoms to form distorted face-sharing ClK6 octahedra. is represented by the CIF file [CIF]
data_K6Na3Ti2Al2Si8Cl3O26
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.248
_cell_length_b   9.779
_cell_length_c   9.779
_cell_angle_alpha   115.104
_cell_angle_beta   98.168
_cell_angle_gamma   98.203
_symmetry_Int_Tables_number   1
_cell_volume   772.151
_cell_formula_units_Z   1
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  0.893  0.651  0.934  1.0
  K  K1  1  0.893  0.934  0.651  1.0
  K  K2  1  0.107  0.349  0.066  1.0
  K  K3  1  0.107  0.066  0.349  1.0
  K  K4  1  0.637  0.893  0.909  1.0
  K  K5  1  0.363  0.107  0.091  1.0
  Na  Na6  1  0.500  0.617  0.383  1.0
  Na  Na7  1  0.500  0.383  0.617  1.0
  Na  Na8  1  0.000  0.500  0.500  1.0
  Ti  Ti9  1  0.500  0.500  0.000  1.0
  Ti  Ti10  1  0.500  0.000  0.500  1.0
  Al  Al11  1  0.000  0.684  0.316  1.0
  Al  Al12  1  1.000  0.316  0.684  1.0
  Si  Si13  1  0.736  0.177  0.373  1.0
  Si  Si14  1  0.736  0.373  0.177  1.0
  Si  Si15  1  0.264  0.823  0.627  1.0
  Si  Si16  1  0.264  0.627  0.823  1.0
  Si  Si17  1  0.723  0.838  0.265  1.0
  Si  Si18  1  0.723  0.264  0.838  1.0
  Si  Si19  1  0.277  0.162  0.735  1.0
  Si  Si20  1  0.277  0.736  0.162  1.0
  Cl  Cl21  1  0.276  0.382  0.382  1.0
  Cl  Cl22  1  0.724  0.618  0.618  1.0
  Cl  Cl23  1  0.000  0.000  0.000  1.0
  O  O24  1  0.646  0.702  0.090  1.0
  O  O25  1  0.646  0.090  0.701  1.0
  O  O26  1  0.354  0.298  0.910  1.0
  O  O27  1  0.354  0.910  0.299  1.0
  O  O28  1  0.747  0.002  0.246  1.0
  O  O29  1  0.747  0.247  0.002  1.0
  O  O30  1  0.253  0.998  0.754  1.0
  O  O31  1  0.253  0.753  0.998  1.0
  O  O32  1  0.890  0.818  0.324  1.0
  O  O33  1  0.890  0.324  0.818  1.0
  O  O34  1  0.110  0.182  0.676  1.0
  O  O35  1  0.110  0.676  0.182  1.0
  O  O36  1  0.898  0.261  0.495  1.0
  O  O37  1  0.898  0.495  0.261  1.0
  O  O38  1  0.102  0.739  0.505  1.0
  O  O39  1  0.102  0.505  0.739  1.0
  O  O40  1  0.631  0.862  0.401  1.0
  O  O41  1  0.631  0.401  0.862  1.0
  O  O42  1  0.369  0.138  0.599  1.0
  O  O43  1  0.369  0.599  0.138  1.0
  O  O44  1  0.703  0.269  0.269  1.0
  O  O45  1  0.297  0.731  0.731  1.0
  O  O46  1  0.597  0.165  0.454  1.0
  O  O47  1  0.597  0.454  0.165  1.0
  O  O48  1  0.403  0.835  0.546  1.0
  O  O49  1  0.403  0.546  0.835  1.0
[/CIF]
.
The crystal structure described by K6Na3Ti2Al2Si8O26Cl3 is Esseneite-derived structured and crystallizes in the triclinic P-1 space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(4), one O(8), two equivalent O(6), one Cl(1), and one Cl(2) atom. In the second K site, K(2) is bonded in a 8-coordinate geometry to one O(2), one O(3), one O(7), one O(9), two equivalent O(5), one Cl(1), and one Cl(2) atom. In the third K site, K(3) is bonded in a 7-coordinate geometry to one O(1), one O(11), one O(2), one O(3), one O(4), one Cl(1), and one Cl(2) atom. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(10), one O(12), one O(13), one O(9), and two equivalent Cl(1) atoms to form distorted NaCl2O4 octahedra that share corners with two equivalent Na(2)Cl2O4 octahedra,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra,  an edgeedge with one Na(1)Cl2O4 octahedra,  an edgeedge with one Ti(1)O6 octahedra, and  an edgeedge with one Ti(2)O6 octahedra. The corner-sharing octahedral tilt angles are 66°. In the second Na site, Na(2) is bonded to two equivalent O(7), two equivalent O(8), and two equivalent Cl(1) atoms to form distorted NaCl2O4 octahedra that share corners with four equivalent Na(1)Cl2O4 octahedra, corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and edges with two equivalent Al(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 66°. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to two equivalent O(1), two equivalent O(10), and two equivalent O(13) atoms to form TiO6 octahedra that share corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra, and edges with two equivalent Na(1)Cl2O4 octahedra. In the second Ti site, Ti(2) is bonded to two equivalent O(12), two equivalent O(2), and two equivalent O(9) atoms to form TiO6 octahedra that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, corners with two equivalent Si(4)O4 tetrahedra, and edges with two equivalent Na(1)Cl2O4 octahedra. Al(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form AlO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra,  a cornercorner with one Si(4)O4 tetrahedra, and  an edgeedge with one Na(2)Cl2O4 octahedra. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(11), one O(12), one O(3), and one O(7) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(1)Cl2O4 octahedra,  a cornercorner with one Na(2)Cl2O4 octahedra,  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-68°. In the second Si site, Si(2) is bonded to one O(11), one O(13), one O(4), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(1)Cl2O4 octahedra,  a cornercorner with one Na(2)Cl2O4 octahedra,  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 48-68°. In the third Si site, Si(3) is bonded to one O(1), one O(3), one O(5), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(1)Cl2O4 octahedra,  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Al(1)O4 tetrahedra, and  a cornercorner with one Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-67°. In the fourth Si site, Si(4) is bonded to one O(10), one O(2), one O(4), and one O(6) atom to form SiO4 tetrahedra that share  a cornercorner with one Na(1)Cl2O4 octahedra,  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Ti(2)O6 octahedra,  a cornercorner with one Al(1)O4 tetrahedra, and  a cornercorner with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 44-67°. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one K(1), one K(3), one Ti(1), and one Si(3) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(2), one K(3), one Ti(2), and one Si(4) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one K(2), one K(3), one Si(1), and one Si(3) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(3), one Si(2), and one Si(4) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to two equivalent K(2), one Al(1), and one Si(3) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Al(1), and one Si(4) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one K(2), one Na(2), one Al(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one K(1), one Na(2), one Al(1), and one Si(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one K(2), one Na(1), one Ti(2), and one Si(3) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one K(1), one Na(1), one Ti(1), and one Si(4) atom. In the eleventh O site, O(11) is bonded in a distorted bent 150 degrees geometry to one K(3), one Si(1), and one Si(2) atom. In the twelfth O site, O(12) is bonded in a distorted trigonal planar geometry to one Na(1), one Ti(2), and one Si(1) atom. In the thirteenth O site, O(13) is bonded in a 3-coordinate geometry to one Na(1), one Ti(1), and one Si(2) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded to one K(1), one K(2), one K(3), one Na(2), and two equivalent Na(1) atoms to form distorted ClK3Na3 octahedra that share  a cornercorner with one Cl(1)K3Na3 octahedra,  an edgeedge with one Cl(1)K3Na3 octahedra, and  a faceface with one Cl(2)K6 octahedra. The corner-sharing octahedra are not tilted. In the second Cl site, Cl(2) is bonded to two equivalent K(1), two equivalent K(2), and two equivalent K(3) atoms to form distorted face-sharing ClK6 octahedra. is represented by the CIF file [CIF]
data_K6Na3Ti2Al2Si8Cl3O26
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.248
_cell_length_b   9.779
_cell_length_c   9.779
_cell_angle_alpha   115.104
_cell_angle_beta   98.168
_cell_angle_gamma   98.203
_symmetry_Int_Tables_number   1
_cell_volume   772.151
_cell_formula_units_Z   1
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  0.893  0.651  0.934  1.0
  K  K1  1  0.893  0.934  0.651  1.0
  K  K2  1  0.107  0.349  0.066  1.0
  K  K3  1  0.107  0.066  0.349  1.0
  K  K4  1  0.637  0.893  0.909  1.0
  K  K5  1  0.363  0.107  0.091  1.0
  Na  Na6  1  0.500  0.617  0.383  1.0
  Na  Na7  1  0.500  0.383  0.617  1.0
  Na  Na8  1  0.000  0.500  0.500  1.0
  Ti  Ti9  1  0.500  0.500  0.000  1.0
  Ti  Ti10  1  0.500  0.000  0.500  1.0
  Al  Al11  1  0.000  0.684  0.316  1.0
  Al  Al12  1  1.000  0.316  0.684  1.0
  Si  Si13  1  0.736  0.177  0.373  1.0
  Si  Si14  1  0.736  0.373  0.177  1.0
  Si  Si15  1  0.264  0.823  0.627  1.0
  Si  Si16  1  0.264  0.627  0.823  1.0
  Si  Si17  1  0.723  0.838  0.265  1.0
  Si  Si18  1  0.723  0.264  0.838  1.0
  Si  Si19  1  0.277  0.162  0.735  1.0
  Si  Si20  1  0.277  0.736  0.162  1.0
  Cl  Cl21  1  0.276  0.382  0.382  1.0
  Cl  Cl22  1  0.724  0.618  0.618  1.0
  Cl  Cl23  1  0.000  0.000  0.000  1.0
  O  O24  1  0.646  0.702  0.090  1.0
  O  O25  1  0.646  0.090  0.701  1.0
  O  O26  1  0.354  0.298  0.910  1.0
  O  O27  1  0.354  0.910  0.299  1.0
  O  O28  1  0.747  0.002  0.246  1.0
  O  O29  1  0.747  0.247  0.002  1.0
  O  O30  1  0.253  0.998  0.754  1.0
  O  O31  1  0.253  0.753  0.998  1.0
  O  O32  1  0.890  0.818  0.324  1.0
  O  O33  1  0.890  0.324  0.818  1.0
  O  O34  1  0.110  0.182  0.676  1.0
  O  O35  1  0.110  0.676  0.182  1.0
  O  O36  1  0.898  0.261  0.495  1.0
  O  O37  1  0.898  0.495  0.261  1.0
  O  O38  1  0.102  0.739  0.505  1.0
  O  O39  1  0.102  0.505  0.739  1.0
  O  O40  1  0.631  0.862  0.401  1.0
  O  O41  1  0.631  0.401  0.862  1.0
  O  O42  1  0.369  0.138  0.599  1.0
  O  O43  1  0.369  0.599  0.138  1.0
  O  O44  1  0.703  0.269  0.269  1.0
  O  O45  1  0.297  0.731  0.731  1.0
  O  O46  1  0.597  0.165  0.454  1.0
  O  O47  1  0.597  0.454  0.165  1.0
  O  O48  1  0.403  0.835  0.546  1.0
  O  O49  1  0.403  0.546  0.835  1.0
[/CIF]
.