The structure described by NpB8O17 crystallizes in the monoclinic Cc space group. Np(1) is bonded in a distorted linear geometry to one O(10), one O(3), and one O(7) atom. There are eight inequivalent B sites. In the first B site, B(1) is bonded to one O(11), one O(5), one O(6), and one O(7) atom to form corner-sharing BO4 tetrahedra. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(6) atom. In the third B site, B(3) is bonded to one O(12), one O(2), one O(7), and one O(8) atom to form corner-sharing BO4 tetrahedra. In the fourth B site, B(4) is bonded to one O(1), one O(4), one O(5), and one O(8) atom to form corner-sharing BO4 tetrahedra. In the fifth B site, B(5) is bonded to one O(12), one O(15), one O(4), and one O(9) atom to form corner-sharing BO4 tetrahedra. In the sixth B site, B(6) is bonded in a trigonal planar geometry to one O(11), one O(13), and one O(9) atom. In the seventh B site, B(7) is bonded in a trigonal planar geometry to one O(13), one O(14), and one O(15) atom. In the eighth B site, B(8) is bonded in a trigonal planar geometry to one O(14), one O(16), and one O(17) atom. There are seventeen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one B(2) and one B(4) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one B(2) and one B(3) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Np(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one B(4) and one B(5) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one B(1) and one B(4) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one B(1) and one B(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Np(1), one B(1), and one B(3) atom. In the eighth O site, O(8) is bonded in a distorted water-like geometry to one B(3) and one B(4) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one B(5) and one B(6) atom. In the tenth O site, O(10) is bonded in a single-bond geometry to one Np(1) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one B(1) and one B(6) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one B(3) and one B(5) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one B(6) and one B(7) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one B(7) and one B(8) atom. In the fifteenth O site, O(15) is bonded in a bent 120 degrees geometry to one B(5) and one B(7) atom. In the sixteenth O site, O(16) is bonded in a single-bond geometry to one B(8) atom. In the seventeenth O site, O(17) is bonded in a single-bond geometry to one B(8) atom. is represented by the CIF card [CIF]
data_NpB8O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.499
_cell_length_b   9.153
_cell_length_c   11.094
_cell_angle_alpha   89.867
_cell_angle_beta   89.626
_cell_angle_gamma   69.204
_symmetry_Int_Tables_number   1
_cell_volume   616.933
_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
  Np  Np0  1  0.010  0.464  0.753  1.0
  Np  Np1  1  0.474  0.536  0.253  1.0
  B  B2  1  0.492  0.399  0.689  1.0
  B  B3  1  0.891  0.601  0.189  1.0
  B  B4  1  0.206  0.463  0.051  1.0
  B  B5  1  0.669  0.537  0.551  1.0
  B  B6  1  0.860  0.406  0.017  1.0
  B  B7  1  0.267  0.594  0.517  1.0
  B  B8  1  0.545  0.386  0.916  1.0
  B  B9  1  0.931  0.614  0.416  1.0
  B  B10  1  0.847  0.116  0.004  1.0
  B  B11  1  0.963  0.884  0.504  1.0
  B  B12  1  0.749  0.144  0.587  1.0
  B  B13  1  0.893  0.856  0.087  1.0
  B  B14  1  0.124  0.877  0.926  1.0
  B  B15  1  0.001  0.123  0.426  1.0
  B  B16  1  0.406  0.887  0.788  1.0
  B  B17  1  0.293  0.113  0.288  1.0
  O  O18  1  0.870  0.544  0.527  1.0
  O  O19  1  0.414  0.456  0.027  1.0
  O  O20  1  0.072  0.420  0.974  1.0
  O  O21  1  0.492  0.580  0.474  1.0
  O  O22  1  0.096  0.262  0.726  1.0
  O  O23  1  0.358  0.738  0.226  1.0
  O  O24  1  0.639  0.216  0.941  1.0
  O  O25  1  0.855  0.784  0.441  1.0
  O  O26  1  0.402  0.424  0.812  1.0
  O  O27  1  0.826  0.576  0.312  1.0
  O  O28  1  0.651  0.484  0.667  1.0
  O  O29  1  0.136  0.516  0.167  1.0
  O  O30  1  0.285  0.480  0.618  1.0
  O  O31  1  0.765  0.520  0.118  1.0
  O  O32  1  0.729  0.446  0.907  1.0
  O  O33  1  0.175  0.554  0.407  1.0
  O  O34  1  0.816  0.985  0.591  1.0
  O  O35  1  0.802  0.015  0.091  1.0
  O  O36  1  0.912  0.666  0.780  1.0
  O  O37  1  0.578  0.334  0.281  1.0
  O  O38  1  0.591  0.237  0.664  1.0
  O  O39  1  0.828  0.763  0.164  1.0
  O  O40  1  0.881  0.252  0.062  1.0
  O  O41  1  0.133  0.748  0.562  1.0
  O  O42  1  0.059  0.783  0.003  1.0
  O  O43  1  0.842  0.217  0.503  1.0
  O  O44  1  0.303  0.806  0.853  1.0
  O  O45  1  0.109  0.194  0.353  1.0
  O  O46  1  0.019  0.036  0.920  1.0
  O  O47  1  0.054  0.964  0.420  1.0
  O  O48  1  0.451  0.876  0.668  1.0
  O  O49  1  0.328  0.124  0.168  1.0
  O  O50  1  0.507  0.986  0.829  1.0
  O  O51  1  0.493  0.014  0.329  1.0
[/CIF]
.
The structure described by NpB8O17 crystallizes in the monoclinic Cc space group. Np(1) is bonded in a distorted linear geometry to one O(10), one O(3), and one O(7) atom. There are eight inequivalent B sites. In the first B site, B(1) is bonded to one O(11), one O(5), one O(6), and one O(7) atom to form corner-sharing BO4 tetrahedra. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(6) atom. In the third B site, B(3) is bonded to one O(12), one O(2), one O(7), and one O(8) atom to form corner-sharing BO4 tetrahedra. In the fourth B site, B(4) is bonded to one O(1), one O(4), one O(5), and one O(8) atom to form corner-sharing BO4 tetrahedra. In the fifth B site, B(5) is bonded to one O(12), one O(15), one O(4), and one O(9) atom to form corner-sharing BO4 tetrahedra. In the sixth B site, B(6) is bonded in a trigonal planar geometry to one O(11), one O(13), and one O(9) atom. In the seventh B site, B(7) is bonded in a trigonal planar geometry to one O(13), one O(14), and one O(15) atom. In the eighth B site, B(8) is bonded in a trigonal planar geometry to one O(14), one O(16), and one O(17) atom. There are seventeen inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one B(2) and one B(4) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one B(2) and one B(3) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Np(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one B(4) and one B(5) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one B(1) and one B(4) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one B(1) and one B(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Np(1), one B(1), and one B(3) atom. In the eighth O site, O(8) is bonded in a distorted water-like geometry to one B(3) and one B(4) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one B(5) and one B(6) atom. In the tenth O site, O(10) is bonded in a single-bond geometry to one Np(1) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one B(1) and one B(6) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one B(3) and one B(5) atom. In the thirteenth O site, O(13) is bonded in a bent 120 degrees geometry to one B(6) and one B(7) atom. In the fourteenth O site, O(14) is bonded in a bent 120 degrees geometry to one B(7) and one B(8) atom. In the fifteenth O site, O(15) is bonded in a bent 120 degrees geometry to one B(5) and one B(7) atom. In the sixteenth O site, O(16) is bonded in a single-bond geometry to one B(8) atom. In the seventeenth O site, O(17) is bonded in a single-bond geometry to one B(8) atom. is represented by the CIF card [CIF]
data_NpB8O17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.499
_cell_length_b   9.153
_cell_length_c   11.094
_cell_angle_alpha   89.867
_cell_angle_beta   89.626
_cell_angle_gamma   69.204
_symmetry_Int_Tables_number   1
_cell_volume   616.933
_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
  Np  Np0  1  0.010  0.464  0.753  1.0
  Np  Np1  1  0.474  0.536  0.253  1.0
  B  B2  1  0.492  0.399  0.689  1.0
  B  B3  1  0.891  0.601  0.189  1.0
  B  B4  1  0.206  0.463  0.051  1.0
  B  B5  1  0.669  0.537  0.551  1.0
  B  B6  1  0.860  0.406  0.017  1.0
  B  B7  1  0.267  0.594  0.517  1.0
  B  B8  1  0.545  0.386  0.916  1.0
  B  B9  1  0.931  0.614  0.416  1.0
  B  B10  1  0.847  0.116  0.004  1.0
  B  B11  1  0.963  0.884  0.504  1.0
  B  B12  1  0.749  0.144  0.587  1.0
  B  B13  1  0.893  0.856  0.087  1.0
  B  B14  1  0.124  0.877  0.926  1.0
  B  B15  1  0.001  0.123  0.426  1.0
  B  B16  1  0.406  0.887  0.788  1.0
  B  B17  1  0.293  0.113  0.288  1.0
  O  O18  1  0.870  0.544  0.527  1.0
  O  O19  1  0.414  0.456  0.027  1.0
  O  O20  1  0.072  0.420  0.974  1.0
  O  O21  1  0.492  0.580  0.474  1.0
  O  O22  1  0.096  0.262  0.726  1.0
  O  O23  1  0.358  0.738  0.226  1.0
  O  O24  1  0.639  0.216  0.941  1.0
  O  O25  1  0.855  0.784  0.441  1.0
  O  O26  1  0.402  0.424  0.812  1.0
  O  O27  1  0.826  0.576  0.312  1.0
  O  O28  1  0.651  0.484  0.667  1.0
  O  O29  1  0.136  0.516  0.167  1.0
  O  O30  1  0.285  0.480  0.618  1.0
  O  O31  1  0.765  0.520  0.118  1.0
  O  O32  1  0.729  0.446  0.907  1.0
  O  O33  1  0.175  0.554  0.407  1.0
  O  O34  1  0.816  0.985  0.591  1.0
  O  O35  1  0.802  0.015  0.091  1.0
  O  O36  1  0.912  0.666  0.780  1.0
  O  O37  1  0.578  0.334  0.281  1.0
  O  O38  1  0.591  0.237  0.664  1.0
  O  O39  1  0.828  0.763  0.164  1.0
  O  O40  1  0.881  0.252  0.062  1.0
  O  O41  1  0.133  0.748  0.562  1.0
  O  O42  1  0.059  0.783  0.003  1.0
  O  O43  1  0.842  0.217  0.503  1.0
  O  O44  1  0.303  0.806  0.853  1.0
  O  O45  1  0.109  0.194  0.353  1.0
  O  O46  1  0.019  0.036  0.920  1.0
  O  O47  1  0.054  0.964  0.420  1.0
  O  O48  1  0.451  0.876  0.668  1.0
  O  O49  1  0.328  0.124  0.168  1.0
  O  O50  1  0.507  0.986  0.829  1.0
  O  O51  1  0.493  0.014  0.329  1.0
[/CIF]
.