The compound described by K2Cr2AsHO10 crystallizes in the trigonal P3_1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(5), one O(7), one O(8), and one O(9) atom. In the second K site, K(2) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(6), one O(7), one O(8), and one O(9) atom. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form CrO4 tetrahedra that share  a cornercorner with one As(1)O4 tetrahedra. In the second Cr site, Cr(2) is bonded to one O(10), one O(7), one O(8), and one O(9) atom to form CrO4 tetrahedra that share  a cornercorner with one As(1)O4 tetrahedra. As(1) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form AsO4 tetrahedra that share  a cornercorner with one Cr(1)O4 tetrahedra and  a cornercorner with one Cr(2)O4 tetrahedra. H(1) is bonded in a linear geometry to one O(5) and one O(6) atom. There are ten inequivalent O sites. In the first O site, O(6) is bonded in a 3-coordinate geometry to one K(2), one As(1), and one H(1) atom. In the second O site, O(7) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one Cr(2), and one As(1) atom. In the third O site, O(8) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one Cr(2) atom. In the fourth O site, O(9) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one Cr(2) atom. In the fifth O site, O(10) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one Cr(2) atom. In the sixth O site, O(1) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one Cr(1) atom. In the seventh O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one Cr(1) atom. In the eighth O site, O(3) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one Cr(1) atom. In the ninth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one K(2), one Cr(1), and one As(1) atom. In the tenth O site, O(5) is bonded in a 2-coordinate geometry to one K(1), one As(1), and one H(1) atom. is represented by the CIF file [CIF]
data_K2Cr2AsHO10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.689
_cell_length_b   7.689
_cell_length_c   14.436
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   739.055
_cell_formula_units_Z   3
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  0.553  0.014  0.014  1.0
  K  K1  1  0.461  0.447  0.681  1.0
  K  K2  1  0.986  0.539  0.348  1.0
  K  K3  1  0.386  0.391  0.187  1.0
  K  K4  1  0.005  0.614  0.854  1.0
  K  K5  1  0.609  0.995  0.520  1.0
  Cr  Cr6  1  0.572  0.994  0.277  1.0
  Cr  Cr7  1  0.422  0.428  0.944  1.0
  Cr  Cr8  1  0.006  0.578  0.610  1.0
  Cr  Cr9  1  0.988  0.574  0.095  1.0
  Cr  Cr10  1  0.585  0.012  0.761  1.0
  Cr  Cr11  1  0.426  0.415  0.428  1.0
  As  As12  1  0.865  0.889  0.166  1.0
  As  As13  1  0.024  0.135  0.833  1.0
  As  As14  1  0.111  0.976  0.500  1.0
  H  H15  1  0.947  0.967  0.975  1.0
  H  H16  1  0.020  0.053  0.641  1.0
  H  H17  1  0.033  0.980  0.308  1.0
  O  O18  1  0.756  0.138  0.344  1.0
  O  O19  1  0.382  0.244  0.010  1.0
  O  O20  1  0.862  0.618  0.677  1.0
  O  O21  1  0.535  0.123  0.200  1.0
  O  O22  1  0.589  0.465  0.866  1.0
  O  O23  1  0.877  0.411  0.533  1.0
  O  O24  1  0.375  0.859  0.339  1.0
  O  O25  1  0.484  0.625  0.005  1.0
  O  O26  1  0.141  0.516  0.672  1.0
  O  O27  1  0.638  0.826  0.218  1.0
  O  O28  1  0.188  0.362  0.884  1.0
  O  O29  1  0.174  0.812  0.551  1.0
  O  O30  1  0.900  0.011  0.068  1.0
  O  O31  1  0.111  0.100  0.735  1.0
  O  O32  1  0.989  0.889  0.402  1.0
  O  O33  1  0.059  0.029  0.240  1.0
  O  O34  1  0.970  0.941  0.907  1.0
  O  O35  1  0.971  0.030  0.573  1.0
  O  O36  1  0.834  0.650  0.160  1.0
  O  O37  1  0.816  0.166  0.827  1.0
  O  O38  1  0.350  0.184  0.493  1.0
  O  O39  1  0.156  0.766  0.040  1.0
  O  O40  1  0.610  0.844  0.707  1.0
  O  O41  1  0.234  0.390  0.373  1.0
  O  O42  1  0.088  0.490  0.168  1.0
  O  O43  1  0.402  0.912  0.834  1.0
  O  O44  1  0.510  0.598  0.501  1.0
  O  O45  1  0.848  0.404  0.021  1.0
  O  O46  1  0.556  0.152  0.688  1.0
  O  O47  1  0.596  0.444  0.355  1.0
[/CIF]
.
The compound described by K2Cr2AsHO10 crystallizes in the trigonal P3_1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(5), one O(7), one O(8), and one O(9) atom. In the second K site, K(2) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(4), one O(6), one O(7), one O(8), and one O(9) atom. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form CrO4 tetrahedra that share  a cornercorner with one As(1)O4 tetrahedra. In the second Cr site, Cr(2) is bonded to one O(10), one O(7), one O(8), and one O(9) atom to form CrO4 tetrahedra that share  a cornercorner with one As(1)O4 tetrahedra. As(1) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form AsO4 tetrahedra that share  a cornercorner with one Cr(1)O4 tetrahedra and  a cornercorner with one Cr(2)O4 tetrahedra. H(1) is bonded in a linear geometry to one O(5) and one O(6) atom. There are ten inequivalent O sites. In the first O site, O(6) is bonded in a 3-coordinate geometry to one K(2), one As(1), and one H(1) atom. In the second O site, O(7) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one Cr(2), and one As(1) atom. In the third O site, O(8) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one Cr(2) atom. In the fourth O site, O(9) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one Cr(2) atom. In the fifth O site, O(10) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one Cr(2) atom. In the sixth O site, O(1) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one Cr(1) atom. In the seventh O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one Cr(1) atom. In the eighth O site, O(3) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one Cr(1) atom. In the ninth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one K(2), one Cr(1), and one As(1) atom. In the tenth O site, O(5) is bonded in a 2-coordinate geometry to one K(1), one As(1), and one H(1) atom. is represented by the CIF file [CIF]
data_K2Cr2AsHO10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.689
_cell_length_b   7.689
_cell_length_c   14.436
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   739.055
_cell_formula_units_Z   3
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  0.553  0.014  0.014  1.0
  K  K1  1  0.461  0.447  0.681  1.0
  K  K2  1  0.986  0.539  0.348  1.0
  K  K3  1  0.386  0.391  0.187  1.0
  K  K4  1  0.005  0.614  0.854  1.0
  K  K5  1  0.609  0.995  0.520  1.0
  Cr  Cr6  1  0.572  0.994  0.277  1.0
  Cr  Cr7  1  0.422  0.428  0.944  1.0
  Cr  Cr8  1  0.006  0.578  0.610  1.0
  Cr  Cr9  1  0.988  0.574  0.095  1.0
  Cr  Cr10  1  0.585  0.012  0.761  1.0
  Cr  Cr11  1  0.426  0.415  0.428  1.0
  As  As12  1  0.865  0.889  0.166  1.0
  As  As13  1  0.024  0.135  0.833  1.0
  As  As14  1  0.111  0.976  0.500  1.0
  H  H15  1  0.947  0.967  0.975  1.0
  H  H16  1  0.020  0.053  0.641  1.0
  H  H17  1  0.033  0.980  0.308  1.0
  O  O18  1  0.756  0.138  0.344  1.0
  O  O19  1  0.382  0.244  0.010  1.0
  O  O20  1  0.862  0.618  0.677  1.0
  O  O21  1  0.535  0.123  0.200  1.0
  O  O22  1  0.589  0.465  0.866  1.0
  O  O23  1  0.877  0.411  0.533  1.0
  O  O24  1  0.375  0.859  0.339  1.0
  O  O25  1  0.484  0.625  0.005  1.0
  O  O26  1  0.141  0.516  0.672  1.0
  O  O27  1  0.638  0.826  0.218  1.0
  O  O28  1  0.188  0.362  0.884  1.0
  O  O29  1  0.174  0.812  0.551  1.0
  O  O30  1  0.900  0.011  0.068  1.0
  O  O31  1  0.111  0.100  0.735  1.0
  O  O32  1  0.989  0.889  0.402  1.0
  O  O33  1  0.059  0.029  0.240  1.0
  O  O34  1  0.970  0.941  0.907  1.0
  O  O35  1  0.971  0.030  0.573  1.0
  O  O36  1  0.834  0.650  0.160  1.0
  O  O37  1  0.816  0.166  0.827  1.0
  O  O38  1  0.350  0.184  0.493  1.0
  O  O39  1  0.156  0.766  0.040  1.0
  O  O40  1  0.610  0.844  0.707  1.0
  O  O41  1  0.234  0.390  0.373  1.0
  O  O42  1  0.088  0.490  0.168  1.0
  O  O43  1  0.402  0.912  0.834  1.0
  O  O44  1  0.510  0.598  0.501  1.0
  O  O45  1  0.848  0.404  0.021  1.0
  O  O46  1  0.556  0.152  0.688  1.0
  O  O47  1  0.596  0.444  0.355  1.0
[/CIF]
.