The material structure described by K2BeF4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to two equivalent F(3), three equivalent F(2), and four equivalent F(1) atoms. In the second K site, K(2) is bonded in a 10-coordinate geometry to one F(2), three equivalent F(3), and six equivalent F(1) atoms. Be(1) is bonded in a tetrahedral geometry to one F(2), one F(3), and two equivalent F(1) atoms. There are three inequivalent F sites. In the first F site, F(1) is bonded in a distorted single-bond geometry to two equivalent K(1), three equivalent K(2), and one Be(1) atom. In the second F site, F(2) is bonded in a distorted single-bond geometry to one K(2), three equivalent K(1), and one Be(1) atom. In the third F site, F(3) is bonded in a distorted single-bond geometry to two equivalent K(1), three equivalent K(2), and one Be(1) atom. is represented by the CIF file [CIF]
data_K2BeF4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.620
_cell_length_b   7.258
_cell_length_c   9.799
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   399.744
_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  0.250  0.989  0.309  1.0
  K  K1  1  0.750  0.011  0.691  1.0
  K  K2  1  0.750  0.511  0.809  1.0
  K  K3  1  0.250  0.489  0.191  1.0
  K  K4  1  0.250  0.156  0.910  1.0
  K  K5  1  0.750  0.844  0.090  1.0
  K  K6  1  0.750  0.344  0.410  1.0
  K  K7  1  0.250  0.656  0.590  1.0
  Be  Be8  1  0.250  0.233  0.582  1.0
  Be  Be9  1  0.750  0.767  0.418  1.0
  Be  Be10  1  0.750  0.267  0.082  1.0
  Be  Be11  1  0.250  0.733  0.918  1.0
  F  F12  1  0.025  0.307  0.655  1.0
  F  F13  1  0.525  0.693  0.345  1.0
  F  F14  1  0.525  0.193  0.155  1.0
  F  F15  1  0.025  0.807  0.845  1.0
  F  F16  1  0.475  0.807  0.845  1.0
  F  F17  1  0.975  0.193  0.155  1.0
  F  F18  1  0.975  0.693  0.345  1.0
  F  F19  1  0.475  0.307  0.655  1.0
  F  F20  1  0.250  0.520  0.916  1.0
  F  F21  1  0.750  0.480  0.084  1.0
  F  F22  1  0.750  0.980  0.416  1.0
  F  F23  1  0.250  0.020  0.584  1.0
  F  F24  1  0.250  0.812  0.067  1.0
  F  F25  1  0.750  0.188  0.933  1.0
  F  F26  1  0.750  0.688  0.567  1.0
  F  F27  1  0.250  0.312  0.433  1.0
[/CIF]
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The material structure described by K2BeF4 crystallizes in the orthorhombic Pnma space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to two equivalent F(3), three equivalent F(2), and four equivalent F(1) atoms. In the second K site, K(2) is bonded in a 10-coordinate geometry to one F(2), three equivalent F(3), and six equivalent F(1) atoms. Be(1) is bonded in a tetrahedral geometry to one F(2), one F(3), and two equivalent F(1) atoms. There are three inequivalent F sites. In the first F site, F(1) is bonded in a distorted single-bond geometry to two equivalent K(1), three equivalent K(2), and one Be(1) atom. In the second F site, F(2) is bonded in a distorted single-bond geometry to one K(2), three equivalent K(1), and one Be(1) atom. In the third F site, F(3) is bonded in a distorted single-bond geometry to two equivalent K(1), three equivalent K(2), and one Be(1) atom. is represented by the CIF file [CIF]
data_K2BeF4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.620
_cell_length_b   7.258
_cell_length_c   9.799
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   399.744
_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  0.250  0.989  0.309  1.0
  K  K1  1  0.750  0.011  0.691  1.0
  K  K2  1  0.750  0.511  0.809  1.0
  K  K3  1  0.250  0.489  0.191  1.0
  K  K4  1  0.250  0.156  0.910  1.0
  K  K5  1  0.750  0.844  0.090  1.0
  K  K6  1  0.750  0.344  0.410  1.0
  K  K7  1  0.250  0.656  0.590  1.0
  Be  Be8  1  0.250  0.233  0.582  1.0
  Be  Be9  1  0.750  0.767  0.418  1.0
  Be  Be10  1  0.750  0.267  0.082  1.0
  Be  Be11  1  0.250  0.733  0.918  1.0
  F  F12  1  0.025  0.307  0.655  1.0
  F  F13  1  0.525  0.693  0.345  1.0
  F  F14  1  0.525  0.193  0.155  1.0
  F  F15  1  0.025  0.807  0.845  1.0
  F  F16  1  0.475  0.807  0.845  1.0
  F  F17  1  0.975  0.193  0.155  1.0
  F  F18  1  0.975  0.693  0.345  1.0
  F  F19  1  0.475  0.307  0.655  1.0
  F  F20  1  0.250  0.520  0.916  1.0
  F  F21  1  0.750  0.480  0.084  1.0
  F  F22  1  0.750  0.980  0.416  1.0
  F  F23  1  0.250  0.020  0.584  1.0
  F  F24  1  0.250  0.812  0.067  1.0
  F  F25  1  0.750  0.188  0.933  1.0
  F  F26  1  0.750  0.688  0.567  1.0
  F  F27  1  0.250  0.312  0.433  1.0
[/CIF]
.