The crystal structure described by K2FeO4 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 O(2), three equivalent O(3), and four equivalent O(1) atoms. In the second K site, K(2) is bonded in a 10-coordinate geometry to one O(3), three equivalent O(2), and six equivalent O(1) atoms. Fe(1) is bonded in a tetrahedral geometry to one O(2), one O(3), and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(1), three equivalent K(2), and one Fe(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1), three equivalent K(2), and one Fe(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one K(2), three equivalent K(1), and one Fe(1) atom. is represented by the CIF card [CIF]
data_K2FeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.791
_cell_length_b   7.638
_cell_length_c   10.244
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   453.086
_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  0.514  0.804  1.0
  K  K1  1  0.750  0.486  0.196  1.0
  K  K2  1  0.250  0.014  0.696  1.0
  K  K3  1  0.750  0.986  0.304  1.0
  K  K4  1  0.250  0.840  0.088  1.0
  K  K5  1  0.750  0.160  0.912  1.0
  K  K6  1  0.750  0.660  0.588  1.0
  K  K7  1  0.250  0.340  0.412  1.0
  Fe  Fe8  1  0.250  0.270  0.078  1.0
  Fe  Fe9  1  0.750  0.730  0.922  1.0
  Fe  Fe10  1  0.250  0.770  0.422  1.0
  Fe  Fe11  1  0.750  0.230  0.578  1.0
  O  O12  1  0.981  0.808  0.849  1.0
  O  O13  1  0.481  0.192  0.151  1.0
  O  O14  1  0.519  0.308  0.651  1.0
  O  O15  1  0.019  0.692  0.349  1.0
  O  O16  1  0.019  0.192  0.151  1.0
  O  O17  1  0.519  0.808  0.849  1.0
  O  O18  1  0.481  0.692  0.349  1.0
  O  O19  1  0.981  0.308  0.651  1.0
  O  O20  1  0.250  0.199  0.926  1.0
  O  O21  1  0.750  0.801  0.074  1.0
  O  O22  1  0.250  0.699  0.574  1.0
  O  O23  1  0.750  0.301  0.426  1.0
  O  O24  1  0.750  0.016  0.584  1.0
  O  O25  1  0.250  0.984  0.416  1.0
  O  O26  1  0.250  0.484  0.084  1.0
  O  O27  1  0.750  0.516  0.916  1.0
[/CIF]
.
The crystal structure described by K2FeO4 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 O(2), three equivalent O(3), and four equivalent O(1) atoms. In the second K site, K(2) is bonded in a 10-coordinate geometry to one O(3), three equivalent O(2), and six equivalent O(1) atoms. Fe(1) is bonded in a tetrahedral geometry to one O(2), one O(3), and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(1), three equivalent K(2), and one Fe(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent K(1), three equivalent K(2), and one Fe(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one K(2), three equivalent K(1), and one Fe(1) atom. is represented by the CIF card [CIF]
data_K2FeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.791
_cell_length_b   7.638
_cell_length_c   10.244
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   453.086
_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  0.514  0.804  1.0
  K  K1  1  0.750  0.486  0.196  1.0
  K  K2  1  0.250  0.014  0.696  1.0
  K  K3  1  0.750  0.986  0.304  1.0
  K  K4  1  0.250  0.840  0.088  1.0
  K  K5  1  0.750  0.160  0.912  1.0
  K  K6  1  0.750  0.660  0.588  1.0
  K  K7  1  0.250  0.340  0.412  1.0
  Fe  Fe8  1  0.250  0.270  0.078  1.0
  Fe  Fe9  1  0.750  0.730  0.922  1.0
  Fe  Fe10  1  0.250  0.770  0.422  1.0
  Fe  Fe11  1  0.750  0.230  0.578  1.0
  O  O12  1  0.981  0.808  0.849  1.0
  O  O13  1  0.481  0.192  0.151  1.0
  O  O14  1  0.519  0.308  0.651  1.0
  O  O15  1  0.019  0.692  0.349  1.0
  O  O16  1  0.019  0.192  0.151  1.0
  O  O17  1  0.519  0.808  0.849  1.0
  O  O18  1  0.481  0.692  0.349  1.0
  O  O19  1  0.981  0.308  0.651  1.0
  O  O20  1  0.250  0.199  0.926  1.0
  O  O21  1  0.750  0.801  0.074  1.0
  O  O22  1  0.250  0.699  0.574  1.0
  O  O23  1  0.750  0.301  0.426  1.0
  O  O24  1  0.750  0.016  0.584  1.0
  O  O25  1  0.250  0.984  0.416  1.0
  O  O26  1  0.250  0.484  0.084  1.0
  O  O27  1  0.750  0.516  0.916  1.0
[/CIF]
.