The compound described by KGdF4 crystallizes in the orthorhombic Pnma space group. K(1) is bonded in a 7-coordinate geometry to one F(3), two equivalent F(1), and four equivalent F(4) atoms. Gd(1) is bonded in a 9-coordinate geometry to one F(4), two equivalent F(1), three equivalent F(2), and three equivalent F(3) atoms. There are four inequivalent F sites. In the first F site, F(1) is bonded to two equivalent K(1) and two equivalent Gd(1) atoms to form FK2Gd2 tetrahedra that share corners with four equivalent F(1)K2Gd2 tetrahedra, corners with six equivalent F(3)KGd3 tetrahedra, and  an edgeedge with one F(3)KGd3 tetrahedra. In the second F site, F(2) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Gd(1) atoms. In the third F site, F(3) is bonded to one K(1) and three equivalent Gd(1) atoms to form FKGd3 tetrahedra that share corners with two equivalent F(3)KGd3 tetrahedra, corners with six equivalent F(1)K2Gd2 tetrahedra,  an edgeedge with one F(1)K2Gd2 tetrahedra, and edges with two equivalent F(3)KGd3 tetrahedra. In the fourth F site, F(4) is bonded in a 5-coordinate geometry to four equivalent K(1) and one Gd(1) atom. is represented by the CIF file [CIF]
data_KGdF4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.643
_cell_length_b   6.134
_cell_length_c   15.381
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   343.776
_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  0.776  0.798  1.0
  K  K1  1  0.250  0.224  0.202  1.0
  K  K2  1  0.250  0.724  0.298  1.0
  K  K3  1  0.750  0.276  0.702  1.0
  Gd  Gd4  1  0.750  0.249  0.440  1.0
  Gd  Gd5  1  0.250  0.751  0.560  1.0
  Gd  Gd6  1  0.250  0.251  0.940  1.0
  Gd  Gd7  1  0.750  0.749  0.060  1.0
  F  F8  1  0.750  0.894  0.633  1.0
  F  F9  1  0.250  0.106  0.367  1.0
  F  F10  1  0.250  0.606  0.133  1.0
  F  F11  1  0.750  0.394  0.867  1.0
  F  F12  1  0.750  0.864  0.463  1.0
  F  F13  1  0.250  0.136  0.537  1.0
  F  F14  1  0.250  0.636  0.963  1.0
  F  F15  1  0.750  0.364  0.037  1.0
  F  F16  1  0.750  0.996  0.942  1.0
  F  F17  1  0.250  0.004  0.058  1.0
  F  F18  1  0.250  0.504  0.442  1.0
  F  F19  1  0.750  0.496  0.558  1.0
  F  F20  1  0.750  0.909  0.191  1.0
  F  F21  1  0.250  0.091  0.809  1.0
  F  F22  1  0.250  0.591  0.691  1.0
  F  F23  1  0.750  0.409  0.309  1.0
[/CIF]
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The compound described by KGdF4 crystallizes in the orthorhombic Pnma space group. K(1) is bonded in a 7-coordinate geometry to one F(3), two equivalent F(1), and four equivalent F(4) atoms. Gd(1) is bonded in a 9-coordinate geometry to one F(4), two equivalent F(1), three equivalent F(2), and three equivalent F(3) atoms. There are four inequivalent F sites. In the first F site, F(1) is bonded to two equivalent K(1) and two equivalent Gd(1) atoms to form FK2Gd2 tetrahedra that share corners with four equivalent F(1)K2Gd2 tetrahedra, corners with six equivalent F(3)KGd3 tetrahedra, and  an edgeedge with one F(3)KGd3 tetrahedra. In the second F site, F(2) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Gd(1) atoms. In the third F site, F(3) is bonded to one K(1) and three equivalent Gd(1) atoms to form FKGd3 tetrahedra that share corners with two equivalent F(3)KGd3 tetrahedra, corners with six equivalent F(1)K2Gd2 tetrahedra,  an edgeedge with one F(1)K2Gd2 tetrahedra, and edges with two equivalent F(3)KGd3 tetrahedra. In the fourth F site, F(4) is bonded in a 5-coordinate geometry to four equivalent K(1) and one Gd(1) atom. is represented by the CIF file [CIF]
data_KGdF4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.643
_cell_length_b   6.134
_cell_length_c   15.381
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   343.776
_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  0.776  0.798  1.0
  K  K1  1  0.250  0.224  0.202  1.0
  K  K2  1  0.250  0.724  0.298  1.0
  K  K3  1  0.750  0.276  0.702  1.0
  Gd  Gd4  1  0.750  0.249  0.440  1.0
  Gd  Gd5  1  0.250  0.751  0.560  1.0
  Gd  Gd6  1  0.250  0.251  0.940  1.0
  Gd  Gd7  1  0.750  0.749  0.060  1.0
  F  F8  1  0.750  0.894  0.633  1.0
  F  F9  1  0.250  0.106  0.367  1.0
  F  F10  1  0.250  0.606  0.133  1.0
  F  F11  1  0.750  0.394  0.867  1.0
  F  F12  1  0.750  0.864  0.463  1.0
  F  F13  1  0.250  0.136  0.537  1.0
  F  F14  1  0.250  0.636  0.963  1.0
  F  F15  1  0.750  0.364  0.037  1.0
  F  F16  1  0.750  0.996  0.942  1.0
  F  F17  1  0.250  0.004  0.058  1.0
  F  F18  1  0.250  0.504  0.442  1.0
  F  F19  1  0.750  0.496  0.558  1.0
  F  F20  1  0.750  0.909  0.191  1.0
  F  F21  1  0.250  0.091  0.809  1.0
  F  F22  1  0.250  0.591  0.691  1.0
  F  F23  1  0.750  0.409  0.309  1.0
[/CIF]
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