The compound described by RbK2NdV2O8 crystallizes in the trigonal P-3m1 space group. Rb(1) is bonded to six equivalent O(2) atoms to form distorted RbO6 cuboctahedra that share corners with six equivalent V(1)O4 tetrahedra, edges with six equivalent K(1)O7 hexagonal pyramids, and faces with two equivalent Nd(1)O6 octahedra. K(1) is bonded to one O(1) and six equivalent O(2) atoms to form distorted KO7 hexagonal pyramids that share corners with six equivalent K(1)O7 hexagonal pyramids,  a cornercorner with one V(1)O4 tetrahedra, edges with three equivalent Rb(1)O6 cuboctahedra, edges with three equivalent Nd(1)O6 octahedra, and edges with three equivalent V(1)O4 tetrahedra. Nd(1) is bonded to six equivalent O(2) atoms to form NdO6 octahedra that share corners with six equivalent V(1)O4 tetrahedra, edges with six equivalent K(1)O7 hexagonal pyramids, and faces with two equivalent Rb(1)O6 cuboctahedra. V(1) is bonded to one O(1) and three equivalent O(2) atoms to form VO4 tetrahedra that share corners with three equivalent Rb(1)O6 cuboctahedra,  a cornercorner with one K(1)O7 hexagonal pyramid, corners with three equivalent Nd(1)O6 octahedra, and edges with three equivalent K(1)O7 hexagonal pyramids. The corner-sharing octahedral tilt angles are 16°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one K(1) and one V(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Rb(1), two equivalent K(1), one Nd(1), and one V(1) atom. is represented by the CIF card [CIF]
data_K2RbNdV2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.152
_cell_length_b   6.152
_cell_length_c   7.969
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   261.224
_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
  K  K0  1  0.333  0.667  0.704  1.0
  K  K1  1  0.667  0.333  0.296  1.0
  Rb  Rb2  1  0.000  0.000  0.000  1.0
  Nd  Nd3  1  0.000  0.000  0.500  1.0
  V  V4  1  0.333  0.667  0.249  1.0
  V  V5  1  0.667  0.333  0.751  1.0
  O  O6  1  0.333  0.667  0.038  1.0
  O  O7  1  0.667  0.333  0.962  1.0
  O  O8  1  0.178  0.822  0.325  1.0
  O  O9  1  0.822  0.178  0.675  1.0
  O  O10  1  0.178  0.355  0.325  1.0
  O  O11  1  0.822  0.645  0.675  1.0
  O  O12  1  0.645  0.822  0.325  1.0
  O  O13  1  0.355  0.178  0.675  1.0
[/CIF]
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The compound described by RbK2NdV2O8 crystallizes in the trigonal P-3m1 space group. Rb(1) is bonded to six equivalent O(2) atoms to form distorted RbO6 cuboctahedra that share corners with six equivalent V(1)O4 tetrahedra, edges with six equivalent K(1)O7 hexagonal pyramids, and faces with two equivalent Nd(1)O6 octahedra. K(1) is bonded to one O(1) and six equivalent O(2) atoms to form distorted KO7 hexagonal pyramids that share corners with six equivalent K(1)O7 hexagonal pyramids,  a cornercorner with one V(1)O4 tetrahedra, edges with three equivalent Rb(1)O6 cuboctahedra, edges with three equivalent Nd(1)O6 octahedra, and edges with three equivalent V(1)O4 tetrahedra. Nd(1) is bonded to six equivalent O(2) atoms to form NdO6 octahedra that share corners with six equivalent V(1)O4 tetrahedra, edges with six equivalent K(1)O7 hexagonal pyramids, and faces with two equivalent Rb(1)O6 cuboctahedra. V(1) is bonded to one O(1) and three equivalent O(2) atoms to form VO4 tetrahedra that share corners with three equivalent Rb(1)O6 cuboctahedra,  a cornercorner with one K(1)O7 hexagonal pyramid, corners with three equivalent Nd(1)O6 octahedra, and edges with three equivalent K(1)O7 hexagonal pyramids. The corner-sharing octahedral tilt angles are 16°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one K(1) and one V(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Rb(1), two equivalent K(1), one Nd(1), and one V(1) atom. is represented by the CIF card [CIF]
data_K2RbNdV2O8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.152
_cell_length_b   6.152
_cell_length_c   7.969
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   261.224
_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
  K  K0  1  0.333  0.667  0.704  1.0
  K  K1  1  0.667  0.333  0.296  1.0
  Rb  Rb2  1  0.000  0.000  0.000  1.0
  Nd  Nd3  1  0.000  0.000  0.500  1.0
  V  V4  1  0.333  0.667  0.249  1.0
  V  V5  1  0.667  0.333  0.751  1.0
  O  O6  1  0.333  0.667  0.038  1.0
  O  O7  1  0.667  0.333  0.962  1.0
  O  O8  1  0.178  0.822  0.325  1.0
  O  O9  1  0.822  0.178  0.675  1.0
  O  O10  1  0.178  0.355  0.325  1.0
  O  O11  1  0.822  0.645  0.675  1.0
  O  O12  1  0.645  0.822  0.325  1.0
  O  O13  1  0.355  0.178  0.675  1.0
[/CIF]
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