The structure described by K2Be2Cu(O3F4)2 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(2), one F(1), one F(3), two equivalent F(2), 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. Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Cu(1) and one O(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent K(1) and one O(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one K(1) and one Cu(1) atom. There are four inequivalent F sites. In the first F site, F(4) is bonded in a single-bond geometry to two equivalent K(1) and one Be(1) atom. In the second F site, F(1) is bonded in a distorted bent 120 degrees geometry to one K(1) and one Be(1) atom. In the third F site, F(2) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Be(1) atom. In the fourth F site, F(3) is bonded in a distorted single-bond geometry to one K(1) and one Be(1) atom. is represented by the CIF card [CIF]
data_K2Be2Cu(O3F4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.948
_cell_length_b   7.477
_cell_length_c   13.524
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   107.737
_symmetry_Int_Tables_number   1
_cell_volume   572.936
_cell_formula_units_Z   2
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  0.873  0.609  0.120  1.0
  K  K1  1  0.127  0.391  0.880  1.0
  K  K2  1  0.127  0.891  0.620  1.0
  K  K3  1  0.873  0.109  0.380  1.0
  Be  Be4  1  0.735  0.612  0.855  1.0
  Be  Be5  1  0.265  0.388  0.145  1.0
  Be  Be6  1  0.265  0.888  0.355  1.0
  Be  Be7  1  0.735  0.112  0.645  1.0
  Cu  Cu8  1  0.500  0.000  0.000  1.0
  Cu  Cu9  1  0.500  0.500  0.500  1.0
  O  O10  1  0.336  0.931  0.868  1.0
  O  O11  1  0.664  0.069  0.132  1.0
  O  O12  1  0.664  0.569  0.368  1.0
  O  O13  1  0.336  0.431  0.632  1.0
  O  O14  1  0.250  0.546  0.670  1.0
  O  O15  1  0.750  0.454  0.330  1.0
  O  O16  1  0.750  0.954  0.170  1.0
  O  O17  1  0.250  0.046  0.830  1.0
  O  O18  1  0.781  0.029  0.938  1.0
  O  O19  1  0.219  0.971  0.062  1.0
  O  O20  1  0.219  0.471  0.438  1.0
  O  O21  1  0.781  0.529  0.562  1.0
  F  F22  1  0.504  0.646  0.828  1.0
  F  F23  1  0.496  0.354  0.172  1.0
  F  F24  1  0.496  0.854  0.328  1.0
  F  F25  1  0.504  0.146  0.672  1.0
  F  F26  1  0.708  0.931  0.583  1.0
  F  F27  1  0.292  0.069  0.417  1.0
  F  F28  1  0.292  0.569  0.083  1.0
  F  F29  1  0.708  0.431  0.917  1.0
  F  F30  1  0.858  0.775  0.944  1.0
  F  F31  1  0.142  0.225  0.056  1.0
  F  F32  1  0.142  0.725  0.444  1.0
  F  F33  1  0.858  0.275  0.556  1.0
  F  F34  1  0.918  0.638  0.772  1.0
  F  F35  1  0.082  0.362  0.228  1.0
  F  F36  1  0.082  0.862  0.272  1.0
  F  F37  1  0.918  0.138  0.728  1.0
[/CIF]
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The structure described by K2Be2Cu(O3F4)2 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(2), one F(1), one F(3), two equivalent F(2), 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. Cu(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Cu(1) and one O(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent K(1) and one O(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one K(1) and one Cu(1) atom. There are four inequivalent F sites. In the first F site, F(4) is bonded in a single-bond geometry to two equivalent K(1) and one Be(1) atom. In the second F site, F(1) is bonded in a distorted bent 120 degrees geometry to one K(1) and one Be(1) atom. In the third F site, F(2) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Be(1) atom. In the fourth F site, F(3) is bonded in a distorted single-bond geometry to one K(1) and one Be(1) atom. is represented by the CIF card [CIF]
data_K2Be2Cu(O3F4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.948
_cell_length_b   7.477
_cell_length_c   13.524
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   107.737
_symmetry_Int_Tables_number   1
_cell_volume   572.936
_cell_formula_units_Z   2
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  0.873  0.609  0.120  1.0
  K  K1  1  0.127  0.391  0.880  1.0
  K  K2  1  0.127  0.891  0.620  1.0
  K  K3  1  0.873  0.109  0.380  1.0
  Be  Be4  1  0.735  0.612  0.855  1.0
  Be  Be5  1  0.265  0.388  0.145  1.0
  Be  Be6  1  0.265  0.888  0.355  1.0
  Be  Be7  1  0.735  0.112  0.645  1.0
  Cu  Cu8  1  0.500  0.000  0.000  1.0
  Cu  Cu9  1  0.500  0.500  0.500  1.0
  O  O10  1  0.336  0.931  0.868  1.0
  O  O11  1  0.664  0.069  0.132  1.0
  O  O12  1  0.664  0.569  0.368  1.0
  O  O13  1  0.336  0.431  0.632  1.0
  O  O14  1  0.250  0.546  0.670  1.0
  O  O15  1  0.750  0.454  0.330  1.0
  O  O16  1  0.750  0.954  0.170  1.0
  O  O17  1  0.250  0.046  0.830  1.0
  O  O18  1  0.781  0.029  0.938  1.0
  O  O19  1  0.219  0.971  0.062  1.0
  O  O20  1  0.219  0.471  0.438  1.0
  O  O21  1  0.781  0.529  0.562  1.0
  F  F22  1  0.504  0.646  0.828  1.0
  F  F23  1  0.496  0.354  0.172  1.0
  F  F24  1  0.496  0.854  0.328  1.0
  F  F25  1  0.504  0.146  0.672  1.0
  F  F26  1  0.708  0.931  0.583  1.0
  F  F27  1  0.292  0.069  0.417  1.0
  F  F28  1  0.292  0.569  0.083  1.0
  F  F29  1  0.708  0.431  0.917  1.0
  F  F30  1  0.858  0.775  0.944  1.0
  F  F31  1  0.142  0.225  0.056  1.0
  F  F32  1  0.142  0.725  0.444  1.0
  F  F33  1  0.858  0.275  0.556  1.0
  F  F34  1  0.918  0.638  0.772  1.0
  F  F35  1  0.082  0.362  0.228  1.0
  F  F36  1  0.082  0.862  0.272  1.0
  F  F37  1  0.918  0.138  0.728  1.0
[/CIF]
.