The crystal structure described by KAsO3 crystallizes in the orthorhombic Pbcn space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. In the second K site, K(2) is bonded in a body-centered cubic geometry to two equivalent O(2) and six equivalent O(1) atoms. As(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form corner-sharing AsO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(3) is bonded in a distorted trigonal planar geometry to one K(1) and two equivalent As(1) atoms. In the second O site, O(1) is bonded in a distorted single-bond geometry to one K(1), three equivalent K(2), and one As(1) atom. In the third O site, O(2) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one As(1) atom. is represented by the CIF file [CIF]
data_KAsO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.903
_cell_length_b   11.383
_cell_length_c   11.510
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   642.395
_cell_formula_units_Z   8
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  0.500  0.810  1.0
  K  K1  1  0.750  0.000  0.690  1.0
  K  K2  1  0.750  0.500  0.190  1.0
  K  K3  1  0.250  0.000  0.310  1.0
  K  K4  1  0.750  0.500  0.610  1.0
  K  K5  1  0.250  0.000  0.890  1.0
  K  K6  1  0.250  0.500  0.390  1.0
  K  K7  1  0.750  0.000  0.110  1.0
  As  As8  1  0.720  0.730  0.911  1.0
  As  As9  1  0.220  0.770  0.589  1.0
  As  As10  1  0.280  0.230  0.589  1.0
  As  As11  1  0.780  0.270  0.911  1.0
  As  As12  1  0.280  0.270  0.089  1.0
  As  As13  1  0.780  0.230  0.411  1.0
  As  As14  1  0.720  0.770  0.411  1.0
  As  As15  1  0.220  0.730  0.089  1.0
  O  O16  1  0.749  0.874  0.900  1.0
  O  O17  1  0.249  0.626  0.600  1.0
  O  O18  1  0.251  0.374  0.600  1.0
  O  O19  1  0.751  0.126  0.900  1.0
  O  O20  1  0.251  0.126  0.100  1.0
  O  O21  1  0.751  0.374  0.400  1.0
  O  O22  1  0.749  0.626  0.400  1.0
  O  O23  1  0.249  0.874  0.100  1.0
  O  O24  1  0.791  0.639  0.805  1.0
  O  O25  1  0.291  0.861  0.695  1.0
  O  O26  1  0.209  0.139  0.695  1.0
  O  O27  1  0.709  0.361  0.805  1.0
  O  O28  1  0.209  0.361  0.195  1.0
  O  O29  1  0.709  0.139  0.305  1.0
  O  O30  1  0.791  0.861  0.305  1.0
  O  O31  1  0.291  0.639  0.195  1.0
  O  O32  1  0.390  0.686  0.958  1.0
  O  O33  1  0.890  0.814  0.542  1.0
  O  O34  1  0.610  0.186  0.542  1.0
  O  O35  1  0.110  0.314  0.958  1.0
  O  O36  1  0.610  0.314  0.042  1.0
  O  O37  1  0.110  0.186  0.458  1.0
  O  O38  1  0.390  0.814  0.458  1.0
  O  O39  1  0.890  0.686  0.042  1.0
[/CIF]
.
The crystal structure described by KAsO3 crystallizes in the orthorhombic Pbcn space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms. In the second K site, K(2) is bonded in a body-centered cubic geometry to two equivalent O(2) and six equivalent O(1) atoms. As(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form corner-sharing AsO4 tetrahedra. There are three inequivalent O sites. In the first O site, O(3) is bonded in a distorted trigonal planar geometry to one K(1) and two equivalent As(1) atoms. In the second O site, O(1) is bonded in a distorted single-bond geometry to one K(1), three equivalent K(2), and one As(1) atom. In the third O site, O(2) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one As(1) atom. is represented by the CIF file [CIF]
data_KAsO3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.903
_cell_length_b   11.383
_cell_length_c   11.510
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   642.395
_cell_formula_units_Z   8
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  0.500  0.810  1.0
  K  K1  1  0.750  0.000  0.690  1.0
  K  K2  1  0.750  0.500  0.190  1.0
  K  K3  1  0.250  0.000  0.310  1.0
  K  K4  1  0.750  0.500  0.610  1.0
  K  K5  1  0.250  0.000  0.890  1.0
  K  K6  1  0.250  0.500  0.390  1.0
  K  K7  1  0.750  0.000  0.110  1.0
  As  As8  1  0.720  0.730  0.911  1.0
  As  As9  1  0.220  0.770  0.589  1.0
  As  As10  1  0.280  0.230  0.589  1.0
  As  As11  1  0.780  0.270  0.911  1.0
  As  As12  1  0.280  0.270  0.089  1.0
  As  As13  1  0.780  0.230  0.411  1.0
  As  As14  1  0.720  0.770  0.411  1.0
  As  As15  1  0.220  0.730  0.089  1.0
  O  O16  1  0.749  0.874  0.900  1.0
  O  O17  1  0.249  0.626  0.600  1.0
  O  O18  1  0.251  0.374  0.600  1.0
  O  O19  1  0.751  0.126  0.900  1.0
  O  O20  1  0.251  0.126  0.100  1.0
  O  O21  1  0.751  0.374  0.400  1.0
  O  O22  1  0.749  0.626  0.400  1.0
  O  O23  1  0.249  0.874  0.100  1.0
  O  O24  1  0.791  0.639  0.805  1.0
  O  O25  1  0.291  0.861  0.695  1.0
  O  O26  1  0.209  0.139  0.695  1.0
  O  O27  1  0.709  0.361  0.805  1.0
  O  O28  1  0.209  0.361  0.195  1.0
  O  O29  1  0.709  0.139  0.305  1.0
  O  O30  1  0.791  0.861  0.305  1.0
  O  O31  1  0.291  0.639  0.195  1.0
  O  O32  1  0.390  0.686  0.958  1.0
  O  O33  1  0.890  0.814  0.542  1.0
  O  O34  1  0.610  0.186  0.542  1.0
  O  O35  1  0.110  0.314  0.958  1.0
  O  O36  1  0.610  0.314  0.042  1.0
  O  O37  1  0.110  0.186  0.458  1.0
  O  O38  1  0.390  0.814  0.458  1.0
  O  O39  1  0.890  0.686  0.042  1.0
[/CIF]
.