The compound described by KW2AsO9 crystallizes in the orthorhombic P2_12_12_1 space group. K(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(7), one O(8), one O(9), and two equivalent O(6) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(2), one O(3), one O(6), one O(7), and two equivalent O(1) atoms to form distorted WO6 octahedra that share corners with two equivalent W(1)O6 octahedra, corners with two equivalent W(2)O6 octahedra, and  a cornercorner with one As(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 24-40°. In the second W site, W(2) is bonded to one O(2), one O(3), one O(4), one O(5), one O(8), and one O(9) atom to form WO6 octahedra that share corners with two equivalent W(1)O6 octahedra and corners with three equivalent As(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 24-40°. As(1) is bonded to one O(4), one O(5), one O(7), and one O(8) atom to form AsO4 tetrahedra that share  a cornercorner with one W(1)O6 octahedra and corners with three equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-53°. There are nine inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to one W(2) and one As(1) atom. In the second O site, O(6) is bonded in a 3-coordinate geometry to two equivalent K(1) and one W(1) atom. In the third O site, O(7) is bonded in a 3-coordinate geometry to one K(1), one W(1), and one As(1) atom. In the fourth O site, O(8) is bonded in a distorted trigonal planar geometry to one K(1), one W(2), and one As(1) atom. In the fifth O site, O(1) is bonded in a distorted bent 150 degrees geometry to one K(1) and two equivalent W(1) atoms. In the sixth O site, O(9) is bonded in a bent 150 degrees geometry to one K(1) and one W(2) atom. In the seventh O site, O(2) is bonded in a distorted bent 150 degrees geometry to one K(1), one W(1), and one W(2) atom. In the eighth O site, O(3) is bonded in a bent 150 degrees geometry to one W(1) and one W(2) atom. In the ninth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one W(2) and one As(1) atom. is represented by the CIF card [CIF]
data_KAsW2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.065
_cell_length_b   9.379
_cell_length_c   17.150
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   814.757
_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  0.277  0.050  0.092  1.0
  K  K1  1  0.223  0.950  0.592  1.0
  K  K2  1  0.777  0.450  0.908  1.0
  K  K3  1  0.723  0.550  0.408  1.0
  As  As4  1  0.351  0.268  0.276  1.0
  As  As5  1  0.149  0.732  0.776  1.0
  As  As6  1  0.851  0.232  0.724  1.0
  As  As7  1  0.649  0.768  0.224  1.0
  W  W8  1  0.362  0.634  0.051  1.0
  W  W9  1  0.138  0.366  0.551  1.0
  W  W10  1  0.862  0.866  0.949  1.0
  W  W11  1  0.638  0.134  0.449  1.0
  W  W12  1  0.883  0.434  0.166  1.0
  W  W13  1  0.617  0.566  0.666  1.0
  W  W14  1  0.383  0.066  0.834  1.0
  W  W15  1  0.117  0.934  0.334  1.0
  O  O16  1  0.124  0.784  0.023  1.0
  O  O17  1  0.376  0.216  0.523  1.0
  O  O18  1  0.624  0.716  0.977  1.0
  O  O19  1  0.876  0.284  0.477  1.0
  O  O20  1  0.654  0.514  0.090  1.0
  O  O21  1  0.846  0.486  0.590  1.0
  O  O22  1  0.154  0.986  0.910  1.0
  O  O23  1  0.346  0.014  0.410  1.0
  O  O24  1  0.150  0.573  0.140  1.0
  O  O25  1  0.350  0.427  0.640  1.0
  O  O26  1  0.650  0.927  0.860  1.0
  O  O27  1  0.850  0.073  0.360  1.0
  O  O28  1  0.084  0.384  0.266  1.0
  O  O29  1  0.416  0.616  0.766  1.0
  O  O30  1  0.584  0.116  0.734  1.0
  O  O31  1  0.916  0.884  0.234  1.0
  O  O32  1  0.582  0.314  0.206  1.0
  O  O33  1  0.918  0.686  0.706  1.0
  O  O34  1  0.082  0.186  0.794  1.0
  O  O35  1  0.418  0.814  0.294  1.0
  O  O36  1  0.250  0.503  0.986  1.0
  O  O37  1  0.250  0.497  0.486  1.0
  O  O38  1  0.750  0.997  0.014  1.0
  O  O39  1  0.750  0.003  0.514  1.0
  O  O40  1  0.476  0.292  0.367  1.0
  O  O41  1  0.024  0.708  0.867  1.0
  O  O42  1  0.976  0.208  0.633  1.0
  O  O43  1  0.524  0.792  0.133  1.0
  O  O44  1  0.266  0.096  0.254  1.0
  O  O45  1  0.234  0.904  0.754  1.0
  O  O46  1  0.766  0.404  0.746  1.0
  O  O47  1  0.734  0.596  0.246  1.0
  O  O48  1  0.013  0.294  0.110  1.0
  O  O49  1  0.487  0.706  0.610  1.0
  O  O50  1  0.513  0.206  0.890  1.0
  O  O51  1  0.987  0.794  0.390  1.0
[/CIF]
.
The compound described by KW2AsO9 crystallizes in the orthorhombic P2_12_12_1 space group. K(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(7), one O(8), one O(9), and two equivalent O(6) atoms. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(2), one O(3), one O(6), one O(7), and two equivalent O(1) atoms to form distorted WO6 octahedra that share corners with two equivalent W(1)O6 octahedra, corners with two equivalent W(2)O6 octahedra, and  a cornercorner with one As(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 24-40°. In the second W site, W(2) is bonded to one O(2), one O(3), one O(4), one O(5), one O(8), and one O(9) atom to form WO6 octahedra that share corners with two equivalent W(1)O6 octahedra and corners with three equivalent As(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 24-40°. As(1) is bonded to one O(4), one O(5), one O(7), and one O(8) atom to form AsO4 tetrahedra that share  a cornercorner with one W(1)O6 octahedra and corners with three equivalent W(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 28-53°. There are nine inequivalent O sites. In the first O site, O(5) is bonded in a bent 150 degrees geometry to one W(2) and one As(1) atom. In the second O site, O(6) is bonded in a 3-coordinate geometry to two equivalent K(1) and one W(1) atom. In the third O site, O(7) is bonded in a 3-coordinate geometry to one K(1), one W(1), and one As(1) atom. In the fourth O site, O(8) is bonded in a distorted trigonal planar geometry to one K(1), one W(2), and one As(1) atom. In the fifth O site, O(1) is bonded in a distorted bent 150 degrees geometry to one K(1) and two equivalent W(1) atoms. In the sixth O site, O(9) is bonded in a bent 150 degrees geometry to one K(1) and one W(2) atom. In the seventh O site, O(2) is bonded in a distorted bent 150 degrees geometry to one K(1), one W(1), and one W(2) atom. In the eighth O site, O(3) is bonded in a bent 150 degrees geometry to one W(1) and one W(2) atom. In the ninth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one W(2) and one As(1) atom. is represented by the CIF card [CIF]
data_KAsW2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.065
_cell_length_b   9.379
_cell_length_c   17.150
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   814.757
_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  0.277  0.050  0.092  1.0
  K  K1  1  0.223  0.950  0.592  1.0
  K  K2  1  0.777  0.450  0.908  1.0
  K  K3  1  0.723  0.550  0.408  1.0
  As  As4  1  0.351  0.268  0.276  1.0
  As  As5  1  0.149  0.732  0.776  1.0
  As  As6  1  0.851  0.232  0.724  1.0
  As  As7  1  0.649  0.768  0.224  1.0
  W  W8  1  0.362  0.634  0.051  1.0
  W  W9  1  0.138  0.366  0.551  1.0
  W  W10  1  0.862  0.866  0.949  1.0
  W  W11  1  0.638  0.134  0.449  1.0
  W  W12  1  0.883  0.434  0.166  1.0
  W  W13  1  0.617  0.566  0.666  1.0
  W  W14  1  0.383  0.066  0.834  1.0
  W  W15  1  0.117  0.934  0.334  1.0
  O  O16  1  0.124  0.784  0.023  1.0
  O  O17  1  0.376  0.216  0.523  1.0
  O  O18  1  0.624  0.716  0.977  1.0
  O  O19  1  0.876  0.284  0.477  1.0
  O  O20  1  0.654  0.514  0.090  1.0
  O  O21  1  0.846  0.486  0.590  1.0
  O  O22  1  0.154  0.986  0.910  1.0
  O  O23  1  0.346  0.014  0.410  1.0
  O  O24  1  0.150  0.573  0.140  1.0
  O  O25  1  0.350  0.427  0.640  1.0
  O  O26  1  0.650  0.927  0.860  1.0
  O  O27  1  0.850  0.073  0.360  1.0
  O  O28  1  0.084  0.384  0.266  1.0
  O  O29  1  0.416  0.616  0.766  1.0
  O  O30  1  0.584  0.116  0.734  1.0
  O  O31  1  0.916  0.884  0.234  1.0
  O  O32  1  0.582  0.314  0.206  1.0
  O  O33  1  0.918  0.686  0.706  1.0
  O  O34  1  0.082  0.186  0.794  1.0
  O  O35  1  0.418  0.814  0.294  1.0
  O  O36  1  0.250  0.503  0.986  1.0
  O  O37  1  0.250  0.497  0.486  1.0
  O  O38  1  0.750  0.997  0.014  1.0
  O  O39  1  0.750  0.003  0.514  1.0
  O  O40  1  0.476  0.292  0.367  1.0
  O  O41  1  0.024  0.708  0.867  1.0
  O  O42  1  0.976  0.208  0.633  1.0
  O  O43  1  0.524  0.792  0.133  1.0
  O  O44  1  0.266  0.096  0.254  1.0
  O  O45  1  0.234  0.904  0.754  1.0
  O  O46  1  0.766  0.404  0.746  1.0
  O  O47  1  0.734  0.596  0.246  1.0
  O  O48  1  0.013  0.294  0.110  1.0
  O  O49  1  0.487  0.706  0.610  1.0
  O  O50  1  0.513  0.206  0.890  1.0
  O  O51  1  0.987  0.794  0.390  1.0
[/CIF]
.