The structure described by Np2SO9 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Np sites. In the first Np site, Np(1) is bonded to one O(1), one O(2), one O(4), two equivalent O(3), and two equivalent O(5) atoms to form distorted NpO7 pentagonal bipyramids that share corners with three equivalent S(1)O4 tetrahedra. In the second Np site, Np(2) is bonded in a 3-coordinate geometry to one O(1), one O(2), one O(6), one O(7), and two equivalent O(3) atoms. S(1) is bonded to one O(4), one O(6), and two equivalent O(5) atoms to form SO4 tetrahedra that share corners with three equivalent Np(1)O7 pentagonal bipyramids. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a distorted single-bond geometry to one Np(1) and one S(1) atom. In the second O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Np(2) and one S(1) atom. In the third O site, O(1) is bonded in a distorted single-bond geometry to one Np(1) and one Np(2) atom. In the fourth O site, O(7) is bonded in a single-bond geometry to one Np(2) atom. In the fifth O site, O(2) is bonded in a distorted linear geometry to one Np(1) and one Np(2) atom. In the sixth O site, O(3) is bonded in a bent 120 degrees geometry to one Np(1) and one Np(2) atom. In the seventh O site, O(4) is bonded in a distorted single-bond geometry to one Np(1) and one S(1) atom. is represented by the CIF file [CIF]
data_Np2SO9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.448
_cell_length_b   6.828
_cell_length_c   15.835
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   697.145
_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
  Np  Np0  1  0.679  0.750  0.395  1.0
  Np  Np1  1  0.821  0.750  0.895  1.0
  Np  Np2  1  0.321  0.250  0.605  1.0
  Np  Np3  1  0.179  0.250  0.105  1.0
  Np  Np4  1  0.967  0.750  0.155  1.0
  Np  Np5  1  0.533  0.750  0.655  1.0
  Np  Np6  1  0.033  0.250  0.845  1.0
  Np  Np7  1  0.467  0.250  0.345  1.0
  S  S8  1  0.070  0.750  0.560  1.0
  S  S9  1  0.430  0.750  0.060  1.0
  S  S10  1  0.930  0.250  0.440  1.0
  S  S11  1  0.570  0.250  0.940  1.0
  O  O12  1  0.566  0.750  0.499  1.0
  O  O13  1  0.934  0.750  0.999  1.0
  O  O14  1  0.434  0.250  0.501  1.0
  O  O15  1  0.066  0.250  0.001  1.0
  O  O16  1  0.791  0.750  0.290  1.0
  O  O17  1  0.709  0.750  0.790  1.0
  O  O18  1  0.209  0.250  0.710  1.0
  O  O19  1  0.291  0.250  0.210  1.0
  O  O20  1  0.949  0.467  0.149  1.0
  O  O21  1  0.551  0.033  0.649  1.0
  O  O22  1  0.051  0.967  0.851  1.0
  O  O23  1  0.449  0.533  0.351  1.0
  O  O24  1  0.051  0.533  0.851  1.0
  O  O25  1  0.449  0.967  0.351  1.0
  O  O26  1  0.949  0.033  0.149  1.0
  O  O27  1  0.551  0.467  0.649  1.0
  O  O28  1  0.007  0.750  0.472  1.0
  O  O29  1  0.493  0.750  0.972  1.0
  O  O30  1  0.993  0.250  0.528  1.0
  O  O31  1  0.507  0.250  0.028  1.0
  O  O32  1  0.205  0.579  0.578  1.0
  O  O33  1  0.295  0.921  0.078  1.0
  O  O34  1  0.795  0.079  0.422  1.0
  O  O35  1  0.705  0.421  0.922  1.0
  O  O36  1  0.795  0.421  0.422  1.0
  O  O37  1  0.705  0.079  0.922  1.0
  O  O38  1  0.205  0.921  0.578  1.0
  O  O39  1  0.295  0.579  0.078  1.0
  O  O40  1  0.891  0.750  0.617  1.0
  O  O41  1  0.609  0.750  0.117  1.0
  O  O42  1  0.109  0.250  0.383  1.0
  O  O43  1  0.391  0.250  0.883  1.0
  O  O44  1  0.178  0.750  0.231  1.0
  O  O45  1  0.322  0.750  0.731  1.0
  O  O46  1  0.822  0.250  0.769  1.0
  O  O47  1  0.678  0.250  0.269  1.0
[/CIF]
.
The structure described by Np2SO9 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Np sites. In the first Np site, Np(1) is bonded to one O(1), one O(2), one O(4), two equivalent O(3), and two equivalent O(5) atoms to form distorted NpO7 pentagonal bipyramids that share corners with three equivalent S(1)O4 tetrahedra. In the second Np site, Np(2) is bonded in a 3-coordinate geometry to one O(1), one O(2), one O(6), one O(7), and two equivalent O(3) atoms. S(1) is bonded to one O(4), one O(6), and two equivalent O(5) atoms to form SO4 tetrahedra that share corners with three equivalent Np(1)O7 pentagonal bipyramids. There are seven inequivalent O sites. In the first O site, O(5) is bonded in a distorted single-bond geometry to one Np(1) and one S(1) atom. In the second O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Np(2) and one S(1) atom. In the third O site, O(1) is bonded in a distorted single-bond geometry to one Np(1) and one Np(2) atom. In the fourth O site, O(7) is bonded in a single-bond geometry to one Np(2) atom. In the fifth O site, O(2) is bonded in a distorted linear geometry to one Np(1) and one Np(2) atom. In the sixth O site, O(3) is bonded in a bent 120 degrees geometry to one Np(1) and one Np(2) atom. In the seventh O site, O(4) is bonded in a distorted single-bond geometry to one Np(1) and one S(1) atom. is represented by the CIF file [CIF]
data_Np2SO9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.448
_cell_length_b   6.828
_cell_length_c   15.835
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   697.145
_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
  Np  Np0  1  0.679  0.750  0.395  1.0
  Np  Np1  1  0.821  0.750  0.895  1.0
  Np  Np2  1  0.321  0.250  0.605  1.0
  Np  Np3  1  0.179  0.250  0.105  1.0
  Np  Np4  1  0.967  0.750  0.155  1.0
  Np  Np5  1  0.533  0.750  0.655  1.0
  Np  Np6  1  0.033  0.250  0.845  1.0
  Np  Np7  1  0.467  0.250  0.345  1.0
  S  S8  1  0.070  0.750  0.560  1.0
  S  S9  1  0.430  0.750  0.060  1.0
  S  S10  1  0.930  0.250  0.440  1.0
  S  S11  1  0.570  0.250  0.940  1.0
  O  O12  1  0.566  0.750  0.499  1.0
  O  O13  1  0.934  0.750  0.999  1.0
  O  O14  1  0.434  0.250  0.501  1.0
  O  O15  1  0.066  0.250  0.001  1.0
  O  O16  1  0.791  0.750  0.290  1.0
  O  O17  1  0.709  0.750  0.790  1.0
  O  O18  1  0.209  0.250  0.710  1.0
  O  O19  1  0.291  0.250  0.210  1.0
  O  O20  1  0.949  0.467  0.149  1.0
  O  O21  1  0.551  0.033  0.649  1.0
  O  O22  1  0.051  0.967  0.851  1.0
  O  O23  1  0.449  0.533  0.351  1.0
  O  O24  1  0.051  0.533  0.851  1.0
  O  O25  1  0.449  0.967  0.351  1.0
  O  O26  1  0.949  0.033  0.149  1.0
  O  O27  1  0.551  0.467  0.649  1.0
  O  O28  1  0.007  0.750  0.472  1.0
  O  O29  1  0.493  0.750  0.972  1.0
  O  O30  1  0.993  0.250  0.528  1.0
  O  O31  1  0.507  0.250  0.028  1.0
  O  O32  1  0.205  0.579  0.578  1.0
  O  O33  1  0.295  0.921  0.078  1.0
  O  O34  1  0.795  0.079  0.422  1.0
  O  O35  1  0.705  0.421  0.922  1.0
  O  O36  1  0.795  0.421  0.422  1.0
  O  O37  1  0.705  0.079  0.922  1.0
  O  O38  1  0.205  0.921  0.578  1.0
  O  O39  1  0.295  0.579  0.078  1.0
  O  O40  1  0.891  0.750  0.617  1.0
  O  O41  1  0.609  0.750  0.117  1.0
  O  O42  1  0.109  0.250  0.383  1.0
  O  O43  1  0.391  0.250  0.883  1.0
  O  O44  1  0.178  0.750  0.231  1.0
  O  O45  1  0.322  0.750  0.731  1.0
  O  O46  1  0.822  0.250  0.769  1.0
  O  O47  1  0.678  0.250  0.269  1.0
[/CIF]
.