The material structure described by KSmF4 crystallizes in the orthorhombic Pnma space group. K(1) is bonded in a 7-coordinate geometry to one F(4), two equivalent F(2), and four equivalent F(1) atoms. Sm(1) is bonded in a 9-coordinate geometry to one F(1), two equivalent F(2), three equivalent F(3), and three equivalent F(4) atoms. There are four inequivalent F sites. In the first F site, F(1) is bonded in a 5-coordinate geometry to four equivalent K(1) and one Sm(1) atom. In the second F site, F(2) is bonded to two equivalent K(1) and two equivalent Sm(1) atoms to form FK2Sm2 tetrahedra that share corners with four equivalent F(2)K2Sm2 tetrahedra, corners with six equivalent F(4)KSm3 tetrahedra, and  an edgeedge with one F(4)KSm3 tetrahedra. In the third F site, F(3) is bonded in a trigonal non-coplanar geometry to three equivalent Sm(1) atoms. In the fourth F site, F(4) is bonded to one K(1) and three equivalent Sm(1) atoms to form FKSm3 tetrahedra that share corners with two equivalent F(4)KSm3 tetrahedra, corners with six equivalent F(2)K2Sm2 tetrahedra,  an edgeedge with one F(2)K2Sm2 tetrahedra, and edges with two equivalent F(4)KSm3 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_KSmF4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.675
_cell_length_b   6.152
_cell_length_c   15.432
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   348.963
_cell_formula_units_Z   4
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  0.750  0.723  0.797  1.0
  K  K1  1  0.250  0.277  0.203  1.0
  K  K2  1  0.750  0.223  0.703  1.0
  K  K3  1  0.250  0.777  0.297  1.0
  Sm  Sm4  1  0.250  0.749  0.560  1.0
  Sm  Sm5  1  0.750  0.251  0.440  1.0
  Sm  Sm6  1  0.250  0.249  0.940  1.0
  Sm  Sm7  1  0.750  0.751  0.060  1.0
  F  F8  1  0.250  0.909  0.692  1.0
  F  F9  1  0.750  0.091  0.308  1.0
  F  F10  1  0.250  0.409  0.808  1.0
  F  F11  1  0.750  0.591  0.192  1.0
  F  F12  1  0.750  0.604  0.633  1.0
  F  F13  1  0.250  0.396  0.367  1.0
  F  F14  1  0.750  0.104  0.867  1.0
  F  F15  1  0.250  0.896  0.133  1.0
  F  F16  1  0.750  0.636  0.463  1.0
  F  F17  1  0.250  0.364  0.537  1.0
  F  F18  1  0.750  0.136  0.037  1.0
  F  F19  1  0.250  0.864  0.963  1.0
  F  F20  1  0.250  0.495  0.058  1.0
  F  F21  1  0.750  0.505  0.942  1.0
  F  F22  1  0.250  0.995  0.442  1.0
  F  F23  1  0.750  0.005  0.558  1.0
[/CIF]
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The material structure described by KSmF4 crystallizes in the orthorhombic Pnma space group. K(1) is bonded in a 7-coordinate geometry to one F(4), two equivalent F(2), and four equivalent F(1) atoms. Sm(1) is bonded in a 9-coordinate geometry to one F(1), two equivalent F(2), three equivalent F(3), and three equivalent F(4) atoms. There are four inequivalent F sites. In the first F site, F(1) is bonded in a 5-coordinate geometry to four equivalent K(1) and one Sm(1) atom. In the second F site, F(2) is bonded to two equivalent K(1) and two equivalent Sm(1) atoms to form FK2Sm2 tetrahedra that share corners with four equivalent F(2)K2Sm2 tetrahedra, corners with six equivalent F(4)KSm3 tetrahedra, and  an edgeedge with one F(4)KSm3 tetrahedra. In the third F site, F(3) is bonded in a trigonal non-coplanar geometry to three equivalent Sm(1) atoms. In the fourth F site, F(4) is bonded to one K(1) and three equivalent Sm(1) atoms to form FKSm3 tetrahedra that share corners with two equivalent F(4)KSm3 tetrahedra, corners with six equivalent F(2)K2Sm2 tetrahedra,  an edgeedge with one F(2)K2Sm2 tetrahedra, and edges with two equivalent F(4)KSm3 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_KSmF4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.675
_cell_length_b   6.152
_cell_length_c   15.432
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   348.963
_cell_formula_units_Z   4
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  0.750  0.723  0.797  1.0
  K  K1  1  0.250  0.277  0.203  1.0
  K  K2  1  0.750  0.223  0.703  1.0
  K  K3  1  0.250  0.777  0.297  1.0
  Sm  Sm4  1  0.250  0.749  0.560  1.0
  Sm  Sm5  1  0.750  0.251  0.440  1.0
  Sm  Sm6  1  0.250  0.249  0.940  1.0
  Sm  Sm7  1  0.750  0.751  0.060  1.0
  F  F8  1  0.250  0.909  0.692  1.0
  F  F9  1  0.750  0.091  0.308  1.0
  F  F10  1  0.250  0.409  0.808  1.0
  F  F11  1  0.750  0.591  0.192  1.0
  F  F12  1  0.750  0.604  0.633  1.0
  F  F13  1  0.250  0.396  0.367  1.0
  F  F14  1  0.750  0.104  0.867  1.0
  F  F15  1  0.250  0.896  0.133  1.0
  F  F16  1  0.750  0.636  0.463  1.0
  F  F17  1  0.250  0.364  0.537  1.0
  F  F18  1  0.750  0.136  0.037  1.0
  F  F19  1  0.250  0.864  0.963  1.0
  F  F20  1  0.250  0.495  0.058  1.0
  F  F21  1  0.750  0.505  0.942  1.0
  F  F22  1  0.250  0.995  0.442  1.0
  F  F23  1  0.750  0.005  0.558  1.0
[/CIF]
.