The crystal structure described by K2NS2O7 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 8-coordinate geometry to one O(3), one O(4), one O(5), one O(6), two equivalent O(2), and two equivalent O(7) atoms. In the second K site, K(2) is bonded in a 10-coordinate geometry to one O(2), one O(5), one O(6), one O(7), two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. N(1) is bonded in a trigonal planar geometry to one S(1), one S(2), and one O(6) atom. There are two inequivalent S sites. In the first S site, S(1) is bonded to one N(1), one O(1), one O(4), and one O(5) atom to form corner-sharing SNO3 tetrahedra. In the second S site, S(2) is bonded to one N(1), one O(2), one O(3), and one O(7) atom to form corner-sharing SNO3 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(2) and one S(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one K(2), two equivalent K(1), and one S(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one S(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one S(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one S(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one N(1) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one S(2) atom. is represented by the CIF card [CIF]
data_K2S2NO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.284
_cell_length_b   7.451
_cell_length_c   7.799
_cell_angle_alpha   67.795
_cell_angle_beta   81.195
_cell_angle_gamma   82.110
_symmetry_Int_Tables_number   1
_cell_volume   385.798
_cell_formula_units_Z   2
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  0.692  0.850  0.661  1.0
  K  K1  1  0.192  0.722  0.077  1.0
  K  K2  1  0.308  0.150  0.339  1.0
  K  K3  1  0.808  0.278  0.923  1.0
  S  S4  1  0.643  0.739  0.172  1.0
  S  S5  1  0.184  0.690  0.625  1.0
  S  S6  1  0.816  0.310  0.375  1.0
  S  S7  1  0.357  0.261  0.828  1.0
  N  N8  1  0.660  0.525  0.390  1.0
  N  N9  1  0.340  0.475  0.610  1.0
  O  O10  1  0.820  0.827  0.125  1.0
  O  O11  1  0.884  0.221  0.557  1.0
  O  O12  1  0.040  0.607  0.779  1.0
  O  O13  1  0.396  0.348  0.957  1.0
  O  O14  1  0.513  0.143  0.772  1.0
  O  O15  1  0.644  0.555  0.540  1.0
  O  O16  1  0.116  0.779  0.443  1.0
  O  O17  1  0.180  0.173  0.875  1.0
  O  O18  1  0.305  0.806  0.667  1.0
  O  O19  1  0.487  0.857  0.228  1.0
  O  O20  1  0.604  0.652  0.043  1.0
  O  O21  1  0.356  0.445  0.460  1.0
  O  O22  1  0.960  0.393  0.221  1.0
  O  O23  1  0.695  0.194  0.333  1.0
[/CIF]
.
The crystal structure described by K2NS2O7 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 8-coordinate geometry to one O(3), one O(4), one O(5), one O(6), two equivalent O(2), and two equivalent O(7) atoms. In the second K site, K(2) is bonded in a 10-coordinate geometry to one O(2), one O(5), one O(6), one O(7), two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. N(1) is bonded in a trigonal planar geometry to one S(1), one S(2), and one O(6) atom. There are two inequivalent S sites. In the first S site, S(1) is bonded to one N(1), one O(1), one O(4), and one O(5) atom to form corner-sharing SNO3 tetrahedra. In the second S site, S(2) is bonded to one N(1), one O(2), one O(3), and one O(7) atom to form corner-sharing SNO3 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent K(2) and one S(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one K(2), two equivalent K(1), and one S(2) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one S(2) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one S(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one S(1) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one N(1) atom. In the seventh O site, O(7) is bonded in a distorted single-bond geometry to one K(2), two equivalent K(1), and one S(2) atom. is represented by the CIF card [CIF]
data_K2S2NO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.284
_cell_length_b   7.451
_cell_length_c   7.799
_cell_angle_alpha   67.795
_cell_angle_beta   81.195
_cell_angle_gamma   82.110
_symmetry_Int_Tables_number   1
_cell_volume   385.798
_cell_formula_units_Z   2
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  0.692  0.850  0.661  1.0
  K  K1  1  0.192  0.722  0.077  1.0
  K  K2  1  0.308  0.150  0.339  1.0
  K  K3  1  0.808  0.278  0.923  1.0
  S  S4  1  0.643  0.739  0.172  1.0
  S  S5  1  0.184  0.690  0.625  1.0
  S  S6  1  0.816  0.310  0.375  1.0
  S  S7  1  0.357  0.261  0.828  1.0
  N  N8  1  0.660  0.525  0.390  1.0
  N  N9  1  0.340  0.475  0.610  1.0
  O  O10  1  0.820  0.827  0.125  1.0
  O  O11  1  0.884  0.221  0.557  1.0
  O  O12  1  0.040  0.607  0.779  1.0
  O  O13  1  0.396  0.348  0.957  1.0
  O  O14  1  0.513  0.143  0.772  1.0
  O  O15  1  0.644  0.555  0.540  1.0
  O  O16  1  0.116  0.779  0.443  1.0
  O  O17  1  0.180  0.173  0.875  1.0
  O  O18  1  0.305  0.806  0.667  1.0
  O  O19  1  0.487  0.857  0.228  1.0
  O  O20  1  0.604  0.652  0.043  1.0
  O  O21  1  0.356  0.445  0.460  1.0
  O  O22  1  0.960  0.393  0.221  1.0
  O  O23  1  0.695  0.194  0.333  1.0
[/CIF]
.