The material described by K5Y2FSi4O13 crystallizes in the monoclinic P2_1/m space group. There are five inequivalent K sites. In the first K site, K(1) is bonded in a 10-coordinate geometry to one O(3), one O(5), two equivalent O(1), two equivalent O(6), two equivalent O(8), and two equivalent F(1) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to two equivalent O(5), two equivalent O(6), two equivalent O(8), and one F(1) atom. In the third K site, K(3) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(4), two equivalent O(6), and one F(1) atom. In the fourth K site, K(4) is bonded in a 9-coordinate geometry to two equivalent O(4), three equivalent O(2), and four equivalent O(1) atoms. In the fifth K site, K(5) is bonded in a 8-coordinate geometry to one O(7), two equivalent O(6), two equivalent O(8), and three equivalent O(9) atoms. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(2), two equivalent O(1), two equivalent O(4), and one F(1) atom to form YO5F octahedra that share  a cornercorner with one Y(2)O5F octahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with three equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 2°. In the second Y site, Y(2) is bonded to one O(9), two equivalent O(6), two equivalent O(8), and one F(1) atom to form YO5F octahedra that share  a cornercorner with one Y(1)O5F octahedra, corners with two equivalent Si(3)O4 tetrahedra, and corners with three equivalent Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles are 2°. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with three equivalent Y(1)O5F octahedra and  a cornercorner with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 13-49°. In the second Si site, Si(2) is bonded to one O(3), one O(5), and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with two equivalent Y(1)O5F octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 17°. In the third Si site, Si(3) is bonded to one O(5), one O(7), and two equivalent O(6) atoms to form SiO4 tetrahedra that share corners with two equivalent Y(2)O5F octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles are 23°. In the fourth Si site, Si(4) is bonded to one O(7), one O(9), and two equivalent O(8) atoms to form SiO4 tetrahedra that share corners with three equivalent Y(2)O5F octahedra and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 11-24°. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one K(1), one K(3), two equivalent K(4), one Y(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent K(4), one Y(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one K(1), two equivalent K(3), one Si(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one K(3), one K(4), one Y(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one K(1), two equivalent K(2), one Si(2), and one Si(3) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one K(1), one K(2), one K(3), one K(5), one Y(2), and one Si(3) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one K(5), one Si(3), and one Si(4) atom. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one K(1), one K(2), one K(5), one Y(2), and one Si(4) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to three equivalent K(5), one Y(2), and one Si(4) atom. F(1) is bonded to one K(2), one K(3), two equivalent K(1), one Y(1), and one Y(2) atom to form corner-sharing FK4Y2 octahedra. The corner-sharing octahedral tilt angles are 6°. is represented by the CIF file [CIF]
data_K5Y2Si4O13F
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.838
_cell_length_b   7.253
_cell_length_c   18.319
_cell_angle_alpha   87.860
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   775.141
_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  0.250  0.524  0.250  1.0
  K  K1  1  0.750  0.476  0.750  1.0
  K  K2  1  0.250  0.132  0.694  1.0
  K  K3  1  0.750  0.868  0.306  1.0
  K  K4  1  0.250  0.795  0.814  1.0
  K  K5  1  0.750  0.205  0.186  1.0
  K  K6  1  0.250  0.803  0.004  1.0
  K  K7  1  0.750  0.197  0.996  1.0
  K  K8  1  0.250  0.259  0.490  1.0
  K  K9  1  0.750  0.741  0.510  1.0
  Y  Y10  1  0.250  0.334  0.890  1.0
  Y  Y11  1  0.750  0.666  0.110  1.0
  Y  Y12  1  0.250  0.597  0.629  1.0
  Y  Y13  1  0.750  0.403  0.371  1.0
  Si  Si14  1  0.250  0.336  0.083  1.0
  Si  Si15  1  0.750  0.664  0.917  1.0
  Si  Si16  1  0.250  0.959  0.173  1.0
  Si  Si17  1  0.750  0.041  0.827  1.0
  Si  Si18  1  0.250  0.083  0.332  1.0
  Si  Si19  1  0.750  0.917  0.668  1.0
  Si  Si20  1  0.250  0.711  0.423  1.0
  Si  Si21  1  0.750  0.289  0.577  1.0
  O  O22  1  0.016  0.453  0.094  1.0
  O  O23  1  0.516  0.547  0.906  1.0
  O  O24  1  0.984  0.547  0.906  1.0
  O  O25  1  0.484  0.453  0.094  1.0
  O  O26  1  0.250  0.227  0.006  1.0
  O  O27  1  0.750  0.773  0.994  1.0
  O  O28  1  0.250  0.184  0.156  1.0
  O  O29  1  0.750  0.816  0.844  1.0
  O  O30  1  0.015  0.869  0.145  1.0
  O  O31  1  0.515  0.131  0.855  1.0
  O  O32  1  0.985  0.131  0.855  1.0
  O  O33  1  0.485  0.869  0.145  1.0
  O  O34  1  0.250  0.936  0.264  1.0
  O  O35  1  0.750  0.064  0.736  1.0
  O  O36  1  0.017  0.206  0.330  1.0
  O  O37  1  0.517  0.794  0.670  1.0
  O  O38  1  0.983  0.794  0.670  1.0
  O  O39  1  0.483  0.206  0.330  1.0
  O  O40  1  0.250  0.942  0.406  1.0
  O  O41  1  0.750  0.058  0.594  1.0
  O  O42  1  0.017  0.624  0.389  1.0
  O  O43  1  0.517  0.376  0.611  1.0
  O  O44  1  0.983  0.376  0.611  1.0
  O  O45  1  0.483  0.624  0.389  1.0
  O  O46  1  0.250  0.686  0.513  1.0
  O  O47  1  0.750  0.314  0.487  1.0
  F  F48  1  0.250  0.462  0.757  1.0
  F  F49  1  0.750  0.538  0.243  1.0
[/CIF]
.
The material described by K5Y2FSi4O13 crystallizes in the monoclinic P2_1/m space group. There are five inequivalent K sites. In the first K site, K(1) is bonded in a 10-coordinate geometry to one O(3), one O(5), two equivalent O(1), two equivalent O(6), two equivalent O(8), and two equivalent F(1) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to two equivalent O(5), two equivalent O(6), two equivalent O(8), and one F(1) atom. In the third K site, K(3) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(4), two equivalent O(6), and one F(1) atom. In the fourth K site, K(4) is bonded in a 9-coordinate geometry to two equivalent O(4), three equivalent O(2), and four equivalent O(1) atoms. In the fifth K site, K(5) is bonded in a 8-coordinate geometry to one O(7), two equivalent O(6), two equivalent O(8), and three equivalent O(9) atoms. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded to one O(2), two equivalent O(1), two equivalent O(4), and one F(1) atom to form YO5F octahedra that share  a cornercorner with one Y(2)O5F octahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with three equivalent Si(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 2°. In the second Y site, Y(2) is bonded to one O(9), two equivalent O(6), two equivalent O(8), and one F(1) atom to form YO5F octahedra that share  a cornercorner with one Y(1)O5F octahedra, corners with two equivalent Si(3)O4 tetrahedra, and corners with three equivalent Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles are 2°. There are four inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SiO4 tetrahedra that share corners with three equivalent Y(1)O5F octahedra and  a cornercorner with one Si(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 13-49°. In the second Si site, Si(2) is bonded to one O(3), one O(5), and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with two equivalent Y(1)O5F octahedra,  a cornercorner with one Si(1)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 17°. In the third Si site, Si(3) is bonded to one O(5), one O(7), and two equivalent O(6) atoms to form SiO4 tetrahedra that share corners with two equivalent Y(2)O5F octahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(4)O4 tetrahedra. The corner-sharing octahedral tilt angles are 23°. In the fourth Si site, Si(4) is bonded to one O(7), one O(9), and two equivalent O(8) atoms to form SiO4 tetrahedra that share corners with three equivalent Y(2)O5F octahedra and  a cornercorner with one Si(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 11-24°. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one K(1), one K(3), two equivalent K(4), one Y(1), and one Si(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent K(4), one Y(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one K(1), two equivalent K(3), one Si(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one K(3), one K(4), one Y(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one K(1), two equivalent K(2), one Si(2), and one Si(3) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one K(1), one K(2), one K(3), one K(5), one Y(2), and one Si(3) atom. In the seventh O site, O(7) is bonded in a 2-coordinate geometry to one K(5), one Si(3), and one Si(4) atom. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one K(1), one K(2), one K(5), one Y(2), and one Si(4) atom. In the ninth O site, O(9) is bonded in a 2-coordinate geometry to three equivalent K(5), one Y(2), and one Si(4) atom. F(1) is bonded to one K(2), one K(3), two equivalent K(1), one Y(1), and one Y(2) atom to form corner-sharing FK4Y2 octahedra. The corner-sharing octahedral tilt angles are 6°. is represented by the CIF file [CIF]
data_K5Y2Si4O13F
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.838
_cell_length_b   7.253
_cell_length_c   18.319
_cell_angle_alpha   87.860
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   775.141
_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  0.250  0.524  0.250  1.0
  K  K1  1  0.750  0.476  0.750  1.0
  K  K2  1  0.250  0.132  0.694  1.0
  K  K3  1  0.750  0.868  0.306  1.0
  K  K4  1  0.250  0.795  0.814  1.0
  K  K5  1  0.750  0.205  0.186  1.0
  K  K6  1  0.250  0.803  0.004  1.0
  K  K7  1  0.750  0.197  0.996  1.0
  K  K8  1  0.250  0.259  0.490  1.0
  K  K9  1  0.750  0.741  0.510  1.0
  Y  Y10  1  0.250  0.334  0.890  1.0
  Y  Y11  1  0.750  0.666  0.110  1.0
  Y  Y12  1  0.250  0.597  0.629  1.0
  Y  Y13  1  0.750  0.403  0.371  1.0
  Si  Si14  1  0.250  0.336  0.083  1.0
  Si  Si15  1  0.750  0.664  0.917  1.0
  Si  Si16  1  0.250  0.959  0.173  1.0
  Si  Si17  1  0.750  0.041  0.827  1.0
  Si  Si18  1  0.250  0.083  0.332  1.0
  Si  Si19  1  0.750  0.917  0.668  1.0
  Si  Si20  1  0.250  0.711  0.423  1.0
  Si  Si21  1  0.750  0.289  0.577  1.0
  O  O22  1  0.016  0.453  0.094  1.0
  O  O23  1  0.516  0.547  0.906  1.0
  O  O24  1  0.984  0.547  0.906  1.0
  O  O25  1  0.484  0.453  0.094  1.0
  O  O26  1  0.250  0.227  0.006  1.0
  O  O27  1  0.750  0.773  0.994  1.0
  O  O28  1  0.250  0.184  0.156  1.0
  O  O29  1  0.750  0.816  0.844  1.0
  O  O30  1  0.015  0.869  0.145  1.0
  O  O31  1  0.515  0.131  0.855  1.0
  O  O32  1  0.985  0.131  0.855  1.0
  O  O33  1  0.485  0.869  0.145  1.0
  O  O34  1  0.250  0.936  0.264  1.0
  O  O35  1  0.750  0.064  0.736  1.0
  O  O36  1  0.017  0.206  0.330  1.0
  O  O37  1  0.517  0.794  0.670  1.0
  O  O38  1  0.983  0.794  0.670  1.0
  O  O39  1  0.483  0.206  0.330  1.0
  O  O40  1  0.250  0.942  0.406  1.0
  O  O41  1  0.750  0.058  0.594  1.0
  O  O42  1  0.017  0.624  0.389  1.0
  O  O43  1  0.517  0.376  0.611  1.0
  O  O44  1  0.983  0.376  0.611  1.0
  O  O45  1  0.483  0.624  0.389  1.0
  O  O46  1  0.250  0.686  0.513  1.0
  O  O47  1  0.750  0.314  0.487  1.0
  F  F48  1  0.250  0.462  0.757  1.0
  F  F49  1  0.750  0.538  0.243  1.0
[/CIF]
.