The material described by K3Np(H3O4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to two equivalent H(3), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. In the second K site, K(2) is bonded in a 9-coordinate geometry to one H(1), one H(2), one H(3), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. Np(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one K(2) and one O(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one K(2) and one O(4) atom. In the third H site, H(3) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(4) is bonded in a water-like geometry to two equivalent K(2), one H(2), and one H(3) atom. In the second O site, O(1) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one Np(1) atom. In the third O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one K(1), two equivalent K(2), and one Np(1) atom. In the fourth O site, O(3) is bonded in a distorted single-bond geometry to one K(1), one Np(1), and one H(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K3Np(H3O4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.682
_cell_length_b   7.809
_cell_length_c   8.313
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.559
_symmetry_Int_Tables_number   1
_cell_volume   433.819
_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  0.500  0.500  0.000  1.0
  K  K1  1  0.000  0.500  0.500  1.0
  K  K2  1  0.545  0.086  0.194  1.0
  K  K3  1  0.955  0.914  0.694  1.0
  K  K4  1  0.455  0.914  0.806  1.0
  K  K5  1  0.045  0.086  0.306  1.0
  Np  Np6  1  0.000  0.500  0.000  1.0
  Np  Np7  1  0.500  0.500  0.500  1.0
  H  H8  1  0.143  0.308  0.783  1.0
  H  H9  1  0.357  0.692  0.283  1.0
  H  H10  1  0.857  0.692  0.217  1.0
  H  H11  1  0.643  0.308  0.717  1.0
  H  H12  1  0.124  0.928  0.039  1.0
  H  H13  1  0.376  0.072  0.539  1.0
  H  H14  1  0.876  0.072  0.961  1.0
  H  H15  1  0.624  0.928  0.461  1.0
  H  H16  1  0.183  0.137  0.961  1.0
  H  H17  1  0.317  0.863  0.461  1.0
  H  H18  1  0.817  0.863  0.039  1.0
  H  H19  1  0.683  0.137  0.539  1.0
  O  O20  1  0.731  0.329  0.931  1.0
  O  O21  1  0.769  0.671  0.431  1.0
  O  O22  1  0.269  0.671  0.069  1.0
  O  O23  1  0.231  0.329  0.569  1.0
  O  O24  1  0.943  0.364  0.196  1.0
  O  O25  1  0.557  0.636  0.696  1.0
  O  O26  1  0.057  0.636  0.804  1.0
  O  O27  1  0.443  0.364  0.304  1.0
  O  O28  1  0.097  0.278  0.895  1.0
  O  O29  1  0.403  0.722  0.395  1.0
  O  O30  1  0.903  0.722  0.105  1.0
  O  O31  1  0.597  0.278  0.605  1.0
  O  O32  1  0.239  0.052  0.999  1.0
  O  O33  1  0.261  0.948  0.499  1.0
  O  O34  1  0.761  0.948  0.001  1.0
  O  O35  1  0.739  0.052  0.501  1.0
[/CIF]
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The material described by K3Np(H3O4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to two equivalent H(3), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. In the second K site, K(2) is bonded in a 9-coordinate geometry to one H(1), one H(2), one H(3), two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms. Np(1) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one K(2) and one O(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one K(2) and one O(4) atom. In the third H site, H(3) is bonded in a distorted single-bond geometry to one K(1), one K(2), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(4) is bonded in a water-like geometry to two equivalent K(2), one H(2), and one H(3) atom. In the second O site, O(1) is bonded in a distorted single-bond geometry to one K(1), two equivalent K(2), and one Np(1) atom. In the third O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to one K(1), two equivalent K(2), and one Np(1) atom. In the fourth O site, O(3) is bonded in a distorted single-bond geometry to one K(1), one Np(1), and one H(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_K3Np(H3O4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.682
_cell_length_b   7.809
_cell_length_c   8.313
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.559
_symmetry_Int_Tables_number   1
_cell_volume   433.819
_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  0.500  0.500  0.000  1.0
  K  K1  1  0.000  0.500  0.500  1.0
  K  K2  1  0.545  0.086  0.194  1.0
  K  K3  1  0.955  0.914  0.694  1.0
  K  K4  1  0.455  0.914  0.806  1.0
  K  K5  1  0.045  0.086  0.306  1.0
  Np  Np6  1  0.000  0.500  0.000  1.0
  Np  Np7  1  0.500  0.500  0.500  1.0
  H  H8  1  0.143  0.308  0.783  1.0
  H  H9  1  0.357  0.692  0.283  1.0
  H  H10  1  0.857  0.692  0.217  1.0
  H  H11  1  0.643  0.308  0.717  1.0
  H  H12  1  0.124  0.928  0.039  1.0
  H  H13  1  0.376  0.072  0.539  1.0
  H  H14  1  0.876  0.072  0.961  1.0
  H  H15  1  0.624  0.928  0.461  1.0
  H  H16  1  0.183  0.137  0.961  1.0
  H  H17  1  0.317  0.863  0.461  1.0
  H  H18  1  0.817  0.863  0.039  1.0
  H  H19  1  0.683  0.137  0.539  1.0
  O  O20  1  0.731  0.329  0.931  1.0
  O  O21  1  0.769  0.671  0.431  1.0
  O  O22  1  0.269  0.671  0.069  1.0
  O  O23  1  0.231  0.329  0.569  1.0
  O  O24  1  0.943  0.364  0.196  1.0
  O  O25  1  0.557  0.636  0.696  1.0
  O  O26  1  0.057  0.636  0.804  1.0
  O  O27  1  0.443  0.364  0.304  1.0
  O  O28  1  0.097  0.278  0.895  1.0
  O  O29  1  0.403  0.722  0.395  1.0
  O  O30  1  0.903  0.722  0.105  1.0
  O  O31  1  0.597  0.278  0.605  1.0
  O  O32  1  0.239  0.052  0.999  1.0
  O  O33  1  0.261  0.948  0.499  1.0
  O  O34  1  0.761  0.948  0.001  1.0
  O  O35  1  0.739  0.052  0.501  1.0
[/CIF]
.