The structure described by KAsO2 crystallizes in the orthorhombic Pbcm space group. K(1) is bonded in a 9-coordinate geometry to one As(1), four equivalent O(1), and four equivalent O(2) atoms. As(1) is bonded in a 3-coordinate geometry to one K(1), one O(2), and two equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to four equivalent K(1) and two equivalent As(1) atoms. In the second O site, O(2) is bonded to four equivalent K(1) and one As(1) atom to form a mixture of distorted corner and edge-sharing OK4As square pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_KAsO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.393
_cell_length_b   7.189
_cell_length_c   7.424
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   287.821
_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  0.366  0.406  1.0
  K  K1  1  0.750  0.366  0.094  1.0
  K  K2  1  0.750  0.634  0.594  1.0
  K  K3  1  0.250  0.634  0.906  1.0
  As  As4  1  0.250  0.855  0.376  1.0
  As  As5  1  0.750  0.145  0.624  1.0
  As  As6  1  0.750  0.855  0.124  1.0
  As  As7  1  0.250  0.145  0.876  1.0
  O  O8  1  0.500  0.265  0.750  1.0
  O  O9  1  0.000  0.735  0.250  1.0
  O  O10  1  0.500  0.735  0.250  1.0
  O  O11  1  0.000  0.265  0.750  1.0
  O  O12  1  0.250  0.714  0.559  1.0
  O  O13  1  0.250  0.286  0.059  1.0
  O  O14  1  0.750  0.714  0.941  1.0
  O  O15  1  0.750  0.286  0.441  1.0
[/CIF]
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The structure described by KAsO2 crystallizes in the orthorhombic Pbcm space group. K(1) is bonded in a 9-coordinate geometry to one As(1), four equivalent O(1), and four equivalent O(2) atoms. As(1) is bonded in a 3-coordinate geometry to one K(1), one O(2), and two equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to four equivalent K(1) and two equivalent As(1) atoms. In the second O site, O(2) is bonded to four equivalent K(1) and one As(1) atom to form a mixture of distorted corner and edge-sharing OK4As square pyramids. is represented by the Crystallographic Information File (CIF) [CIF]
data_KAsO2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.393
_cell_length_b   7.189
_cell_length_c   7.424
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   287.821
_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  0.366  0.406  1.0
  K  K1  1  0.750  0.366  0.094  1.0
  K  K2  1  0.750  0.634  0.594  1.0
  K  K3  1  0.250  0.634  0.906  1.0
  As  As4  1  0.250  0.855  0.376  1.0
  As  As5  1  0.750  0.145  0.624  1.0
  As  As6  1  0.750  0.855  0.124  1.0
  As  As7  1  0.250  0.145  0.876  1.0
  O  O8  1  0.500  0.265  0.750  1.0
  O  O9  1  0.000  0.735  0.250  1.0
  O  O10  1  0.500  0.735  0.250  1.0
  O  O11  1  0.000  0.265  0.750  1.0
  O  O12  1  0.250  0.714  0.559  1.0
  O  O13  1  0.250  0.286  0.059  1.0
  O  O14  1  0.750  0.714  0.941  1.0
  O  O15  1  0.750  0.286  0.441  1.0
[/CIF]
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