The crystal structure described by K4H5(SeO4)4 crystallizes in the triclinic P-1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one H(2), one O(1), one O(2), one O(4), one O(5), one O(6), one O(7), and two equivalent O(3) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(5), one O(8), and two equivalent O(7) atoms. There are three inequivalent H sites. In the first H site, H(1) is bonded in a distorted linear geometry to one O(6) and one O(8) atom. In the second H site, H(2) is bonded in a distorted linear geometry to one K(1), one O(2), and one O(5) atom. In the third H site, H(3) is bonded in a linear geometry to two equivalent O(4) atoms. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a tetrahedral geometry to one O(1), one O(3), one O(7), and one O(8) atom. In the second Se site, Se(2) is bonded in a tetrahedral geometry to one O(2), one O(4), one O(5), and one O(6) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one K(2), and one Se(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one K(2), one H(2), and one Se(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent K(1) and one Se(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one K(1), one H(3), and one Se(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one H(2), and one Se(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one K(1), one H(1), and one Se(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one K(1), two equivalent K(2), and one Se(1) atom. In the eighth O site, O(8) is bonded in a 1-coordinate geometry to one K(2), one H(1), and one Se(1) atom. is represented by the CIF card [CIF]
data_K4H5(SeO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.661
_cell_length_b   7.930
_cell_length_c   7.968
_cell_angle_alpha   72.233
_cell_angle_beta   86.786
_cell_angle_gamma   85.209
_symmetry_Int_Tables_number   1
_cell_volume   459.151
_cell_formula_units_Z   1
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  0.665  0.188  0.337  1.0
  K  K1  1  0.335  0.812  0.663  1.0
  K  K2  1  0.033  0.747  0.217  1.0
  K  K3  1  0.967  0.253  0.783  1.0
  H  H4  1  0.252  0.425  0.031  1.0
  H  H5  1  0.748  0.575  0.969  1.0
  H  H6  1  0.643  0.012  0.081  1.0
  H  H7  1  0.357  0.988  0.919  1.0
  H  H8  1  0.500  0.500  0.500  1.0
  Se  Se9  1  0.129  0.218  0.279  1.0
  Se  Se10  1  0.871  0.782  0.721  1.0
  Se  Se11  1  0.530  0.721  0.199  1.0
  Se  Se12  1  0.470  0.279  0.801  1.0
  O  O13  1  0.005  0.270  0.435  1.0
  O  O14  1  0.995  0.730  0.565  1.0
  O  O15  1  0.323  0.098  0.816  1.0
  O  O16  1  0.677  0.902  0.184  1.0
  O  O17  1  0.311  0.096  0.348  1.0
  O  O18  1  0.689  0.904  0.652  1.0
  O  O19  1  0.433  0.641  0.411  1.0
  O  O20  1  0.567  0.359  0.589  1.0
  O  O21  1  0.369  0.798  0.051  1.0
  O  O22  1  0.631  0.202  0.949  1.0
  O  O23  1  0.664  0.556  0.163  1.0
  O  O24  1  0.336  0.444  0.837  1.0
  O  O25  1  0.014  0.137  0.154  1.0
  O  O26  1  0.986  0.863  0.846  1.0
  O  O27  1  0.191  0.431  0.147  1.0
  O  O28  1  0.809  0.569  0.853  1.0
[/CIF]
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The crystal structure described by K4H5(SeO4)4 crystallizes in the triclinic P-1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one H(2), one O(1), one O(2), one O(4), one O(5), one O(6), one O(7), and two equivalent O(3) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(5), one O(8), and two equivalent O(7) atoms. There are three inequivalent H sites. In the first H site, H(1) is bonded in a distorted linear geometry to one O(6) and one O(8) atom. In the second H site, H(2) is bonded in a distorted linear geometry to one K(1), one O(2), and one O(5) atom. In the third H site, H(3) is bonded in a linear geometry to two equivalent O(4) atoms. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a tetrahedral geometry to one O(1), one O(3), one O(7), and one O(8) atom. In the second Se site, Se(2) is bonded in a tetrahedral geometry to one O(2), one O(4), one O(5), and one O(6) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one K(1), one K(2), and one Se(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one K(1), one K(2), one H(2), and one Se(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent K(1) and one Se(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one K(1), one H(3), and one Se(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one K(1), one K(2), one H(2), and one Se(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one K(1), one H(1), and one Se(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one K(1), two equivalent K(2), and one Se(1) atom. In the eighth O site, O(8) is bonded in a 1-coordinate geometry to one K(2), one H(1), and one Se(1) atom. is represented by the CIF card [CIF]
data_K4H5(SeO4)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.661
_cell_length_b   7.930
_cell_length_c   7.968
_cell_angle_alpha   72.233
_cell_angle_beta   86.786
_cell_angle_gamma   85.209
_symmetry_Int_Tables_number   1
_cell_volume   459.151
_cell_formula_units_Z   1
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  0.665  0.188  0.337  1.0
  K  K1  1  0.335  0.812  0.663  1.0
  K  K2  1  0.033  0.747  0.217  1.0
  K  K3  1  0.967  0.253  0.783  1.0
  H  H4  1  0.252  0.425  0.031  1.0
  H  H5  1  0.748  0.575  0.969  1.0
  H  H6  1  0.643  0.012  0.081  1.0
  H  H7  1  0.357  0.988  0.919  1.0
  H  H8  1  0.500  0.500  0.500  1.0
  Se  Se9  1  0.129  0.218  0.279  1.0
  Se  Se10  1  0.871  0.782  0.721  1.0
  Se  Se11  1  0.530  0.721  0.199  1.0
  Se  Se12  1  0.470  0.279  0.801  1.0
  O  O13  1  0.005  0.270  0.435  1.0
  O  O14  1  0.995  0.730  0.565  1.0
  O  O15  1  0.323  0.098  0.816  1.0
  O  O16  1  0.677  0.902  0.184  1.0
  O  O17  1  0.311  0.096  0.348  1.0
  O  O18  1  0.689  0.904  0.652  1.0
  O  O19  1  0.433  0.641  0.411  1.0
  O  O20  1  0.567  0.359  0.589  1.0
  O  O21  1  0.369  0.798  0.051  1.0
  O  O22  1  0.631  0.202  0.949  1.0
  O  O23  1  0.664  0.556  0.163  1.0
  O  O24  1  0.336  0.444  0.837  1.0
  O  O25  1  0.014  0.137  0.154  1.0
  O  O26  1  0.986  0.863  0.846  1.0
  O  O27  1  0.191  0.431  0.147  1.0
  O  O28  1  0.809  0.569  0.853  1.0
[/CIF]
.