The compound described by K2FeO4 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 3-coordinate geometry to one O(2), one O(3), and one O(4) atom. In the second K site, K(2) is bonded in a 7-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. Fe(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to two equivalent K(2) and one Fe(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one 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(1), two equivalent K(2), and one Fe(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one Fe(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2FeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.992
_cell_length_b   8.628
_cell_length_c   11.776
_cell_angle_alpha   90.000
_cell_angle_beta   121.064
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   521.518
_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  0.216  0.715  0.907  1.0
  K  K1  1  0.431  0.491  0.710  1.0
  K  K2  1  0.216  0.785  0.407  1.0
  K  K3  1  0.569  0.991  0.790  1.0
  K  K4  1  0.431  0.009  0.210  1.0
  K  K5  1  0.784  0.215  0.593  1.0
  K  K6  1  0.569  0.509  0.290  1.0
  K  K7  1  0.784  0.285  0.093  1.0
  Fe  Fe8  1  0.124  0.272  0.935  1.0
  Fe  Fe9  1  0.124  0.228  0.435  1.0
  Fe  Fe10  1  0.876  0.772  0.565  1.0
  Fe  Fe11  1  0.876  0.728  0.065  1.0
  O  O12  1  0.215  0.097  0.914  1.0
  O  O13  1  0.236  0.406  0.876  1.0
  O  O14  1  0.249  0.202  0.597  1.0
  O  O15  1  0.200  0.778  0.643  1.0
  O  O16  1  0.215  0.403  0.414  1.0
  O  O17  1  0.236  0.094  0.376  1.0
  O  O18  1  0.800  0.278  0.857  1.0
  O  O19  1  0.751  0.702  0.903  1.0
  O  O20  1  0.249  0.298  0.097  1.0
  O  O21  1  0.200  0.722  0.143  1.0
  O  O22  1  0.764  0.906  0.624  1.0
  O  O23  1  0.785  0.597  0.586  1.0
  O  O24  1  0.800  0.222  0.357  1.0
  O  O25  1  0.751  0.798  0.403  1.0
  O  O26  1  0.764  0.594  0.124  1.0
  O  O27  1  0.785  0.903  0.086  1.0
[/CIF]
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The compound described by K2FeO4 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 3-coordinate geometry to one O(2), one O(3), and one O(4) atom. In the second K site, K(2) is bonded in a 7-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. Fe(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to two equivalent K(2) and one Fe(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one 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(1), two equivalent K(2), and one Fe(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one Fe(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K2FeO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.992
_cell_length_b   8.628
_cell_length_c   11.776
_cell_angle_alpha   90.000
_cell_angle_beta   121.064
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   521.518
_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  0.216  0.715  0.907  1.0
  K  K1  1  0.431  0.491  0.710  1.0
  K  K2  1  0.216  0.785  0.407  1.0
  K  K3  1  0.569  0.991  0.790  1.0
  K  K4  1  0.431  0.009  0.210  1.0
  K  K5  1  0.784  0.215  0.593  1.0
  K  K6  1  0.569  0.509  0.290  1.0
  K  K7  1  0.784  0.285  0.093  1.0
  Fe  Fe8  1  0.124  0.272  0.935  1.0
  Fe  Fe9  1  0.124  0.228  0.435  1.0
  Fe  Fe10  1  0.876  0.772  0.565  1.0
  Fe  Fe11  1  0.876  0.728  0.065  1.0
  O  O12  1  0.215  0.097  0.914  1.0
  O  O13  1  0.236  0.406  0.876  1.0
  O  O14  1  0.249  0.202  0.597  1.0
  O  O15  1  0.200  0.778  0.643  1.0
  O  O16  1  0.215  0.403  0.414  1.0
  O  O17  1  0.236  0.094  0.376  1.0
  O  O18  1  0.800  0.278  0.857  1.0
  O  O19  1  0.751  0.702  0.903  1.0
  O  O20  1  0.249  0.298  0.097  1.0
  O  O21  1  0.200  0.722  0.143  1.0
  O  O22  1  0.764  0.906  0.624  1.0
  O  O23  1  0.785  0.597  0.586  1.0
  O  O24  1  0.800  0.222  0.357  1.0
  O  O25  1  0.751  0.798  0.403  1.0
  O  O26  1  0.764  0.594  0.124  1.0
  O  O27  1  0.785  0.903  0.086  1.0
[/CIF]
.