The material described by Na3NpO10 crystallizes in the triclinic P-1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms to form NaO6 octahedra that share corners with four equivalent Np(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-61°. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms. Np(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NpO6 octahedra that share corners with four equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-61°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Na(2), one Np(1), and one O(5) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Na(1), one Na(2), and one Np(1) atom. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Na(1), one Na(2), and one Np(1) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to two equivalent Na(2) and one O(5) atom. In the fifth O site, O(5) is bonded in a see-saw-like geometry to one Na(1), one Na(2), one O(1), and one O(4) atom. is represented by the CIF card [CIF]
data_Na3NpO10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.241
_cell_length_b   5.741
_cell_length_c   7.824
_cell_angle_alpha   102.978
_cell_angle_beta   108.540
_cell_angle_gamma   95.092
_symmetry_Int_Tables_number   1
_cell_volume   214.175
_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
  Na  Na0  1  0.500  0.500  0.000  1.0
  Na  Na1  1  0.619  0.200  0.368  1.0
  Na  Na2  1  0.381  0.800  0.632  1.0
  Np  Np3  1  0.000  0.000  0.000  1.0
  O  O4  1  0.911  0.955  0.281  1.0
  O  O5  1  0.089  0.045  0.719  1.0
  O  O6  1  0.711  0.174  0.946  1.0
  O  O7  1  0.289  0.826  0.054  1.0
  O  O8  1  0.251  0.289  0.147  1.0
  O  O9  1  0.749  0.711  0.853  1.0
  O  O10  1  0.236  0.292  0.564  1.0
  O  O11  1  0.764  0.708  0.436  1.0
  O  O12  1  0.097  0.273  0.679  1.0
  O  O13  1  0.903  0.727  0.321  1.0
[/CIF]
.
The material described by Na3NpO10 crystallizes in the triclinic P-1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms to form NaO6 octahedra that share corners with four equivalent Np(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-61°. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms. Np(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NpO6 octahedra that share corners with four equivalent Na(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-61°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Na(2), one Np(1), and one O(5) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Na(1), one Na(2), and one Np(1) atom. In the third O site, O(3) is bonded in a trigonal non-coplanar geometry to one Na(1), one Na(2), and one Np(1) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to two equivalent Na(2) and one O(5) atom. In the fifth O site, O(5) is bonded in a see-saw-like geometry to one Na(1), one Na(2), one O(1), and one O(4) atom. is represented by the CIF card [CIF]
data_Na3NpO10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.241
_cell_length_b   5.741
_cell_length_c   7.824
_cell_angle_alpha   102.978
_cell_angle_beta   108.540
_cell_angle_gamma   95.092
_symmetry_Int_Tables_number   1
_cell_volume   214.175
_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
  Na  Na0  1  0.500  0.500  0.000  1.0
  Na  Na1  1  0.619  0.200  0.368  1.0
  Na  Na2  1  0.381  0.800  0.632  1.0
  Np  Np3  1  0.000  0.000  0.000  1.0
  O  O4  1  0.911  0.955  0.281  1.0
  O  O5  1  0.089  0.045  0.719  1.0
  O  O6  1  0.711  0.174  0.946  1.0
  O  O7  1  0.289  0.826  0.054  1.0
  O  O8  1  0.251  0.289  0.147  1.0
  O  O9  1  0.749  0.711  0.853  1.0
  O  O10  1  0.236  0.292  0.564  1.0
  O  O11  1  0.764  0.708  0.436  1.0
  O  O12  1  0.097  0.273  0.679  1.0
  O  O13  1  0.903  0.727  0.321  1.0
[/CIF]
.