The structure described by K2BeF4 crystallizes in the orthorhombic Pna2_1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 10-coordinate geometry to one F(3), three equivalent F(1), three equivalent F(2), and three equivalent F(4) atoms. In the second K site, K(2) is bonded in a 8-coordinate geometry to two equivalent F(1), two equivalent F(2), two equivalent F(3), and two equivalent F(4) atoms. Be(1) is bonded in a tetrahedral geometry to one F(1), one F(2), one F(3), and one F(4) atom. There are four inequivalent F sites. In the first F site, F(1) is bonded in a distorted single-bond geometry to two equivalent K(2), three equivalent K(1), and one Be(1) atom. In the second F site, F(2) is bonded in a distorted single-bond geometry to two equivalent 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 one K(1), two equivalent K(2), and one Be(1) atom. In the fourth F site, F(4) is bonded in a distorted single-bond geometry to two equivalent K(2), three equivalent K(1), 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   5.782
_cell_length_b   7.401
_cell_length_c   10.053
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   430.194
_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  0.749  0.340  0.587  1.0
  K  K1  1  0.249  0.660  0.413  1.0
  K  K2  1  0.249  0.160  0.087  1.0
  K  K3  1  0.749  0.840  0.913  1.0
  K  K4  1  0.260  0.497  0.805  1.0
  K  K5  1  0.760  0.503  0.195  1.0
  K  K6  1  0.760  0.003  0.305  1.0
  K  K7  1  0.260  0.997  0.695  1.0
  Be  Be8  1  0.750  0.271  0.917  1.0
  Be  Be9  1  0.250  0.729  0.083  1.0
  Be  Be10  1  0.250  0.229  0.417  1.0
  Be  Be11  1  0.750  0.771  0.583  1.0
  F  F12  1  0.536  0.192  0.841  1.0
  F  F13  1  0.036  0.808  0.159  1.0
  F  F14  1  0.036  0.308  0.341  1.0
  F  F15  1  0.536  0.692  0.659  1.0
  F  F16  1  0.979  0.210  0.845  1.0
  F  F17  1  0.479  0.790  0.155  1.0
  F  F18  1  0.479  0.290  0.345  1.0
  F  F19  1  0.979  0.710  0.655  1.0
  F  F20  1  0.730  0.479  0.920  1.0
  F  F21  1  0.230  0.521  0.080  1.0
  F  F22  1  0.230  0.021  0.420  1.0
  F  F23  1  0.730  0.979  0.580  1.0
  F  F24  1  0.252  0.314  0.561  1.0
  F  F25  1  0.752  0.686  0.439  1.0
  F  F26  1  0.752  0.186  0.061  1.0
  F  F27  1  0.252  0.814  0.939  1.0
[/CIF]
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The structure described by K2BeF4 crystallizes in the orthorhombic Pna2_1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 10-coordinate geometry to one F(3), three equivalent F(1), three equivalent F(2), and three equivalent F(4) atoms. In the second K site, K(2) is bonded in a 8-coordinate geometry to two equivalent F(1), two equivalent F(2), two equivalent F(3), and two equivalent F(4) atoms. Be(1) is bonded in a tetrahedral geometry to one F(1), one F(2), one F(3), and one F(4) atom. There are four inequivalent F sites. In the first F site, F(1) is bonded in a distorted single-bond geometry to two equivalent K(2), three equivalent K(1), and one Be(1) atom. In the second F site, F(2) is bonded in a distorted single-bond geometry to two equivalent 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 one K(1), two equivalent K(2), and one Be(1) atom. In the fourth F site, F(4) is bonded in a distorted single-bond geometry to two equivalent K(2), three equivalent K(1), 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   5.782
_cell_length_b   7.401
_cell_length_c   10.053
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   430.194
_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  0.749  0.340  0.587  1.0
  K  K1  1  0.249  0.660  0.413  1.0
  K  K2  1  0.249  0.160  0.087  1.0
  K  K3  1  0.749  0.840  0.913  1.0
  K  K4  1  0.260  0.497  0.805  1.0
  K  K5  1  0.760  0.503  0.195  1.0
  K  K6  1  0.760  0.003  0.305  1.0
  K  K7  1  0.260  0.997  0.695  1.0
  Be  Be8  1  0.750  0.271  0.917  1.0
  Be  Be9  1  0.250  0.729  0.083  1.0
  Be  Be10  1  0.250  0.229  0.417  1.0
  Be  Be11  1  0.750  0.771  0.583  1.0
  F  F12  1  0.536  0.192  0.841  1.0
  F  F13  1  0.036  0.808  0.159  1.0
  F  F14  1  0.036  0.308  0.341  1.0
  F  F15  1  0.536  0.692  0.659  1.0
  F  F16  1  0.979  0.210  0.845  1.0
  F  F17  1  0.479  0.790  0.155  1.0
  F  F18  1  0.479  0.290  0.345  1.0
  F  F19  1  0.979  0.710  0.655  1.0
  F  F20  1  0.730  0.479  0.920  1.0
  F  F21  1  0.230  0.521  0.080  1.0
  F  F22  1  0.230  0.021  0.420  1.0
  F  F23  1  0.730  0.979  0.580  1.0
  F  F24  1  0.252  0.314  0.561  1.0
  F  F25  1  0.752  0.686  0.439  1.0
  F  F26  1  0.752  0.186  0.061  1.0
  F  F27  1  0.252  0.814  0.939  1.0
[/CIF]
.