The material described by KSnF3 crystallizes in the triclinic P-1 space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one F(1), one F(10), one F(2), one F(3), one F(5), one F(7), one F(8), and two equivalent F(11) atoms. In the second K site, K(2) is bonded in a 8-coordinate geometry to one F(1), one F(3), one F(4), one F(7), one F(8), one F(9), and two equivalent F(11) atoms. In the third K site, K(3) is bonded in a 8-coordinate geometry to one F(1), one F(5), one F(8), one F(9), two equivalent F(12), and two equivalent F(4) atoms. In the fourth K site, K(4) is bonded in a 7-coordinate geometry to one F(10), one F(6), one F(7), two equivalent F(2), and two equivalent F(3) atoms. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted rectangular see-saw-like geometry to one F(1), one F(2), one F(5), and one F(6) atom. In the second Sn site, Sn(2) is bonded in a distorted rectangular see-saw-like geometry to one F(3), one F(4), one F(5), and one F(6) atom. In the third Sn site, Sn(3) is bonded in a distorted rectangular see-saw-like geometry to one F(10), one F(7), one F(8), and one F(9) atom. In the fourth Sn site, Sn(4) is bonded in a distorted rectangular see-saw-like geometry to one F(10), one F(11), one F(12), and one F(9) atom. There are twelve inequivalent F sites. In the first F site, F(1) is bonded to one K(1), one K(2), one K(3), and one Sn(1) atom to form distorted FK3Sn trigonal pyramids that share  a cornercorner with one F(5)K2Sn2 tetrahedra,  a cornercorner with one F(4)K3Sn tetrahedra, corners with three equivalent F(8)K3Sn tetrahedra,  a cornercorner with one F(10)K2Sn2 trigonal pyramid,  an edgeedge with one F(5)K2Sn2 tetrahedra,  an edgeedge with one F(9)K2Sn2 tetrahedra, and  an edgeedge with one F(4)K3Sn tetrahedra. In the second F site, F(2) is bonded in a 4-coordinate geometry to one K(1), two equivalent K(4), and one Sn(1) atom. In the third F site, F(3) is bonded in a 5-coordinate geometry to one K(1), one K(2), two equivalent K(4), and one Sn(2) atom. In the fourth F site, F(4) is bonded to one K(2), two equivalent K(3), and one Sn(2) atom to form distorted FK3Sn tetrahedra that share  a cornercorner with one F(5)K2Sn2 tetrahedra,  a cornercorner with one F(9)K2Sn2 tetrahedra,  a cornercorner with one F(8)K3Sn tetrahedra,  a cornercorner with one F(1)K3Sn trigonal pyramid,  an edgeedge with one F(5)K2Sn2 tetrahedra,  an edgeedge with one F(9)K2Sn2 tetrahedra,  an edgeedge with one F(4)K3Sn tetrahedra,  an edgeedge with one F(8)K3Sn tetrahedra, and  an edgeedge with one F(1)K3Sn trigonal pyramid. In the fifth F site, F(5) is bonded to one K(1), one K(3), one Sn(1), and one Sn(2) atom to form FK2Sn2 tetrahedra that share  a cornercorner with one F(9)K2Sn2 tetrahedra,  a cornercorner with one F(4)K3Sn tetrahedra,  a cornercorner with one F(10)K2Sn2 trigonal pyramid,  a cornercorner with one F(1)K3Sn trigonal pyramid,  an edgeedge with one F(4)K3Sn tetrahedra,  an edgeedge with one F(8)K3Sn tetrahedra, and  an edgeedge with one F(1)K3Sn trigonal pyramid. In the sixth F site, F(6) is bonded in a trigonal planar geometry to one K(4), one Sn(1), and one Sn(2) atom. In the seventh F site, F(7) is bonded in a 4-coordinate geometry to one K(1), one K(2), one K(4), and one Sn(3) atom. In the eighth F site, F(8) is bonded to one K(1), one K(2), one K(3), and one Sn(3) atom to form distorted FK3Sn tetrahedra that share  a cornercorner with one F(9)K2Sn2 tetrahedra,  a cornercorner with one F(4)K3Sn tetrahedra, corners with two equivalent F(10)K2Sn2 trigonal pyramids, corners with three equivalent F(1)K3Sn trigonal pyramids,  an edgeedge with one F(5)K2Sn2 tetrahedra,  an edgeedge with one F(9)K2Sn2 tetrahedra, and  an edgeedge with one F(4)K3Sn tetrahedra. In the ninth F site, F(9) is bonded to one K(2), one K(3), one Sn(3), and one Sn(4) atom to form FK2Sn2 tetrahedra that share  a cornercorner with one F(5)K2Sn2 tetrahedra,  a cornercorner with one F(4)K3Sn tetrahedra,  a cornercorner with one F(8)K3Sn tetrahedra, corners with two equivalent F(10)K2Sn2 trigonal pyramids,  an edgeedge with one F(4)K3Sn tetrahedra,  an edgeedge with one F(8)K3Sn tetrahedra, and  an edgeedge with one F(1)K3Sn trigonal pyramid. In the tenth F site, F(10) is bonded to one K(1), one K(4), one Sn(3), and one Sn(4) atom to form distorted FK2Sn2 trigonal pyramids that share  a cornercorner with one F(5)K2Sn2 tetrahedra, corners with two equivalent F(9)K2Sn2 tetrahedra, corners with two equivalent F(8)K3Sn tetrahedra, and  a cornercorner with one F(1)K3Sn trigonal pyramid. In the eleventh F site, F(11) is bonded in a 4-coordinate geometry to two equivalent K(1), two equivalent K(2), and one Sn(4) atom. In the twelfth F site, F(12) is bonded in a distorted T-shaped geometry to two equivalent K(3) and one Sn(4) atom. is represented by the CIF card [CIF]
data_KSnF3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.979
_cell_length_b   9.891
_cell_length_c   10.220
_cell_angle_alpha   80.381
_cell_angle_beta   72.367
_cell_angle_gamma   74.202
_symmetry_Int_Tables_number   1
_cell_volume   736.413
_cell_formula_units_Z   8
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  0.539  0.881  0.365  1.0
  K  K1  1  0.461  0.119  0.635  1.0
  K  K2  1  0.051  0.849  0.394  1.0
  K  K3  1  0.949  0.151  0.606  1.0
  K  K4  1  0.745  0.510  0.491  1.0
  K  K5  1  0.255  0.490  0.509  1.0
  K  K6  1  0.742  0.023  0.986  1.0
  K  K7  1  0.258  0.977  0.014  1.0
  Sn  Sn8  1  0.546  0.618  0.143  1.0
  Sn  Sn9  1  0.454  0.382  0.857  1.0
  Sn  Sn10  1  0.029  0.642  0.127  1.0
  Sn  Sn11  1  0.971  0.358  0.873  1.0
  Sn  Sn12  1  0.271  0.255  0.252  1.0
  Sn  Sn13  1  0.729  0.745  0.748  1.0
  Sn  Sn14  1  0.793  0.217  0.254  1.0
  Sn  Sn15  1  0.207  0.783  0.746  1.0
  F  F16  1  0.385  0.689  0.328  1.0
  F  F17  1  0.615  0.311  0.672  1.0
  F  F18  1  0.567  0.824  0.072  1.0
  F  F19  1  0.433  0.176  0.928  1.0
  F  F20  1  0.938  0.857  0.158  1.0
  F  F21  1  0.062  0.143  0.842  1.0
  F  F22  1  0.058  0.594  0.324  1.0
  F  F23  1  0.942  0.406  0.676  1.0
  F  F24  1  0.743  0.646  0.249  1.0
  F  F25  1  0.257  0.354  0.751  1.0
  F  F26  1  0.285  0.709  0.090  1.0
  F  F27  1  0.715  0.291  0.910  1.0
  F  F28  1  0.232  0.055  0.260  1.0
  F  F29  1  0.768  0.945  0.740  1.0
  F  F30  1  0.261  0.226  0.457  1.0
  F  F31  1  0.739  0.774  0.543  1.0
  F  F32  1  0.041  0.710  0.645  1.0
  F  F33  1  0.959  0.290  0.355  1.0
  F  F34  1  0.445  0.866  0.765  1.0
  F  F35  1  0.555  0.134  0.235  1.0
  F  F36  1  0.231  0.924  0.573  1.0
  F  F37  1  0.769  0.076  0.427  1.0
  F  F38  1  0.411  0.637  0.636  1.0
  F  F39  1  0.589  0.363  0.364  1.0
[/CIF]
.
The material described by KSnF3 crystallizes in the triclinic P-1 space group. There are four inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one F(1), one F(10), one F(2), one F(3), one F(5), one F(7), one F(8), and two equivalent F(11) atoms. In the second K site, K(2) is bonded in a 8-coordinate geometry to one F(1), one F(3), one F(4), one F(7), one F(8), one F(9), and two equivalent F(11) atoms. In the third K site, K(3) is bonded in a 8-coordinate geometry to one F(1), one F(5), one F(8), one F(9), two equivalent F(12), and two equivalent F(4) atoms. In the fourth K site, K(4) is bonded in a 7-coordinate geometry to one F(10), one F(6), one F(7), two equivalent F(2), and two equivalent F(3) atoms. There are four inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted rectangular see-saw-like geometry to one F(1), one F(2), one F(5), and one F(6) atom. In the second Sn site, Sn(2) is bonded in a distorted rectangular see-saw-like geometry to one F(3), one F(4), one F(5), and one F(6) atom. In the third Sn site, Sn(3) is bonded in a distorted rectangular see-saw-like geometry to one F(10), one F(7), one F(8), and one F(9) atom. In the fourth Sn site, Sn(4) is bonded in a distorted rectangular see-saw-like geometry to one F(10), one F(11), one F(12), and one F(9) atom. There are twelve inequivalent F sites. In the first F site, F(1) is bonded to one K(1), one K(2), one K(3), and one Sn(1) atom to form distorted FK3Sn trigonal pyramids that share  a cornercorner with one F(5)K2Sn2 tetrahedra,  a cornercorner with one F(4)K3Sn tetrahedra, corners with three equivalent F(8)K3Sn tetrahedra,  a cornercorner with one F(10)K2Sn2 trigonal pyramid,  an edgeedge with one F(5)K2Sn2 tetrahedra,  an edgeedge with one F(9)K2Sn2 tetrahedra, and  an edgeedge with one F(4)K3Sn tetrahedra. In the second F site, F(2) is bonded in a 4-coordinate geometry to one K(1), two equivalent K(4), and one Sn(1) atom. In the third F site, F(3) is bonded in a 5-coordinate geometry to one K(1), one K(2), two equivalent K(4), and one Sn(2) atom. In the fourth F site, F(4) is bonded to one K(2), two equivalent K(3), and one Sn(2) atom to form distorted FK3Sn tetrahedra that share  a cornercorner with one F(5)K2Sn2 tetrahedra,  a cornercorner with one F(9)K2Sn2 tetrahedra,  a cornercorner with one F(8)K3Sn tetrahedra,  a cornercorner with one F(1)K3Sn trigonal pyramid,  an edgeedge with one F(5)K2Sn2 tetrahedra,  an edgeedge with one F(9)K2Sn2 tetrahedra,  an edgeedge with one F(4)K3Sn tetrahedra,  an edgeedge with one F(8)K3Sn tetrahedra, and  an edgeedge with one F(1)K3Sn trigonal pyramid. In the fifth F site, F(5) is bonded to one K(1), one K(3), one Sn(1), and one Sn(2) atom to form FK2Sn2 tetrahedra that share  a cornercorner with one F(9)K2Sn2 tetrahedra,  a cornercorner with one F(4)K3Sn tetrahedra,  a cornercorner with one F(10)K2Sn2 trigonal pyramid,  a cornercorner with one F(1)K3Sn trigonal pyramid,  an edgeedge with one F(4)K3Sn tetrahedra,  an edgeedge with one F(8)K3Sn tetrahedra, and  an edgeedge with one F(1)K3Sn trigonal pyramid. In the sixth F site, F(6) is bonded in a trigonal planar geometry to one K(4), one Sn(1), and one Sn(2) atom. In the seventh F site, F(7) is bonded in a 4-coordinate geometry to one K(1), one K(2), one K(4), and one Sn(3) atom. In the eighth F site, F(8) is bonded to one K(1), one K(2), one K(3), and one Sn(3) atom to form distorted FK3Sn tetrahedra that share  a cornercorner with one F(9)K2Sn2 tetrahedra,  a cornercorner with one F(4)K3Sn tetrahedra, corners with two equivalent F(10)K2Sn2 trigonal pyramids, corners with three equivalent F(1)K3Sn trigonal pyramids,  an edgeedge with one F(5)K2Sn2 tetrahedra,  an edgeedge with one F(9)K2Sn2 tetrahedra, and  an edgeedge with one F(4)K3Sn tetrahedra. In the ninth F site, F(9) is bonded to one K(2), one K(3), one Sn(3), and one Sn(4) atom to form FK2Sn2 tetrahedra that share  a cornercorner with one F(5)K2Sn2 tetrahedra,  a cornercorner with one F(4)K3Sn tetrahedra,  a cornercorner with one F(8)K3Sn tetrahedra, corners with two equivalent F(10)K2Sn2 trigonal pyramids,  an edgeedge with one F(4)K3Sn tetrahedra,  an edgeedge with one F(8)K3Sn tetrahedra, and  an edgeedge with one F(1)K3Sn trigonal pyramid. In the tenth F site, F(10) is bonded to one K(1), one K(4), one Sn(3), and one Sn(4) atom to form distorted FK2Sn2 trigonal pyramids that share  a cornercorner with one F(5)K2Sn2 tetrahedra, corners with two equivalent F(9)K2Sn2 tetrahedra, corners with two equivalent F(8)K3Sn tetrahedra, and  a cornercorner with one F(1)K3Sn trigonal pyramid. In the eleventh F site, F(11) is bonded in a 4-coordinate geometry to two equivalent K(1), two equivalent K(2), and one Sn(4) atom. In the twelfth F site, F(12) is bonded in a distorted T-shaped geometry to two equivalent K(3) and one Sn(4) atom. is represented by the CIF card [CIF]
data_KSnF3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.979
_cell_length_b   9.891
_cell_length_c   10.220
_cell_angle_alpha   80.381
_cell_angle_beta   72.367
_cell_angle_gamma   74.202
_symmetry_Int_Tables_number   1
_cell_volume   736.413
_cell_formula_units_Z   8
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  0.539  0.881  0.365  1.0
  K  K1  1  0.461  0.119  0.635  1.0
  K  K2  1  0.051  0.849  0.394  1.0
  K  K3  1  0.949  0.151  0.606  1.0
  K  K4  1  0.745  0.510  0.491  1.0
  K  K5  1  0.255  0.490  0.509  1.0
  K  K6  1  0.742  0.023  0.986  1.0
  K  K7  1  0.258  0.977  0.014  1.0
  Sn  Sn8  1  0.546  0.618  0.143  1.0
  Sn  Sn9  1  0.454  0.382  0.857  1.0
  Sn  Sn10  1  0.029  0.642  0.127  1.0
  Sn  Sn11  1  0.971  0.358  0.873  1.0
  Sn  Sn12  1  0.271  0.255  0.252  1.0
  Sn  Sn13  1  0.729  0.745  0.748  1.0
  Sn  Sn14  1  0.793  0.217  0.254  1.0
  Sn  Sn15  1  0.207  0.783  0.746  1.0
  F  F16  1  0.385  0.689  0.328  1.0
  F  F17  1  0.615  0.311  0.672  1.0
  F  F18  1  0.567  0.824  0.072  1.0
  F  F19  1  0.433  0.176  0.928  1.0
  F  F20  1  0.938  0.857  0.158  1.0
  F  F21  1  0.062  0.143  0.842  1.0
  F  F22  1  0.058  0.594  0.324  1.0
  F  F23  1  0.942  0.406  0.676  1.0
  F  F24  1  0.743  0.646  0.249  1.0
  F  F25  1  0.257  0.354  0.751  1.0
  F  F26  1  0.285  0.709  0.090  1.0
  F  F27  1  0.715  0.291  0.910  1.0
  F  F28  1  0.232  0.055  0.260  1.0
  F  F29  1  0.768  0.945  0.740  1.0
  F  F30  1  0.261  0.226  0.457  1.0
  F  F31  1  0.739  0.774  0.543  1.0
  F  F32  1  0.041  0.710  0.645  1.0
  F  F33  1  0.959  0.290  0.355  1.0
  F  F34  1  0.445  0.866  0.765  1.0
  F  F35  1  0.555  0.134  0.235  1.0
  F  F36  1  0.231  0.924  0.573  1.0
  F  F37  1  0.769  0.076  0.427  1.0
  F  F38  1  0.411  0.637  0.636  1.0
  F  F39  1  0.589  0.363  0.364  1.0
[/CIF]
.