The compound described by K2BeO2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to two equivalent O(2) and three equivalent O(1) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to one Be(1), two equivalent O(2), and three equivalent O(1) atoms. Be(1) is bonded in a distorted trigonal planar geometry to one K(2), one O(1), and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to three equivalent K(1), three equivalent K(2), and one Be(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to two equivalent K(1), two equivalent K(2), and two equivalent Be(1) atoms. is represented by the CIF file [CIF]
data_K2BeO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.733
_cell_length_b   7.074
_cell_length_c   7.854
_cell_angle_alpha   89.979
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   318.505
_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  0.659  0.140  0.111  1.0
  K  K1  1  0.159  0.360  0.389  1.0
  K  K2  1  0.341  0.860  0.889  1.0
  K  K3  1  0.841  0.640  0.611  1.0
  K  K4  1  0.561  0.597  0.243  1.0
  K  K5  1  0.061  0.903  0.257  1.0
  K  K6  1  0.439  0.403  0.757  1.0
  K  K7  1  0.939  0.097  0.743  1.0
  Be  Be8  1  0.084  0.375  0.023  1.0
  Be  Be9  1  0.416  0.875  0.523  1.0
  Be  Be10  1  0.916  0.625  0.977  1.0
  Be  Be11  1  0.584  0.125  0.477  1.0
  O  O12  1  0.796  0.809  0.944  1.0
  O  O13  1  0.641  0.918  0.410  1.0
  O  O14  1  0.359  0.082  0.590  1.0
  O  O15  1  0.859  0.418  0.910  1.0
  O  O16  1  0.296  0.691  0.556  1.0
  O  O17  1  0.204  0.191  0.056  1.0
  O  O18  1  0.704  0.309  0.444  1.0
  O  O19  1  0.141  0.582  0.090  1.0
[/CIF]
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The compound described by K2BeO2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to two equivalent O(2) and three equivalent O(1) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to one Be(1), two equivalent O(2), and three equivalent O(1) atoms. Be(1) is bonded in a distorted trigonal planar geometry to one K(2), one O(1), and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to three equivalent K(1), three equivalent K(2), and one Be(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to two equivalent K(1), two equivalent K(2), and two equivalent Be(1) atoms. is represented by the CIF file [CIF]
data_K2BeO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.733
_cell_length_b   7.074
_cell_length_c   7.854
_cell_angle_alpha   89.979
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   318.505
_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  0.659  0.140  0.111  1.0
  K  K1  1  0.159  0.360  0.389  1.0
  K  K2  1  0.341  0.860  0.889  1.0
  K  K3  1  0.841  0.640  0.611  1.0
  K  K4  1  0.561  0.597  0.243  1.0
  K  K5  1  0.061  0.903  0.257  1.0
  K  K6  1  0.439  0.403  0.757  1.0
  K  K7  1  0.939  0.097  0.743  1.0
  Be  Be8  1  0.084  0.375  0.023  1.0
  Be  Be9  1  0.416  0.875  0.523  1.0
  Be  Be10  1  0.916  0.625  0.977  1.0
  Be  Be11  1  0.584  0.125  0.477  1.0
  O  O12  1  0.796  0.809  0.944  1.0
  O  O13  1  0.641  0.918  0.410  1.0
  O  O14  1  0.359  0.082  0.590  1.0
  O  O15  1  0.859  0.418  0.910  1.0
  O  O16  1  0.296  0.691  0.556  1.0
  O  O17  1  0.204  0.191  0.056  1.0
  O  O18  1  0.704  0.309  0.444  1.0
  O  O19  1  0.141  0.582  0.090  1.0
[/CIF]
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