The crystal structure described by Rb2V(PO4)2 crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(8), and two equivalent O(7) atoms. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(7), two equivalent O(1), and two equivalent O(8) atoms. V(1) is bonded to one O(2), one O(4), one O(5), one O(6), and one O(7) atom to form distorted VO5 trigonal bipyramids that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with two equivalent V(1)O5 trigonal bipyramids. In the second P site, P(2) is bonded to one O(3), one O(5), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with two equivalent V(1)O5 trigonal bipyramids. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Rb(1), one Rb(2), one V(1), and one P(1) atom. In the second O site, O(5) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one V(1), and one P(2) atom. In the third O site, O(6) is bonded in a 3-coordinate geometry to one Rb(1), one V(1), and one P(2) atom. In the fourth O site, O(7) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one V(1) atom. In the fifth O site, O(8) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one P(2) atom. In the sixth O site, O(1) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one P(1) atom. In the seventh O site, O(2) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one V(1), and one P(1) atom. In the eighth O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Rb(2), one P(1), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2V(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.042
_cell_length_b   9.081
_cell_length_c   12.865
_cell_angle_alpha   89.996
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   822.754
_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
  Rb  Rb0  1  0.769  0.391  0.593  1.0
  Rb  Rb1  1  0.269  0.109  0.407  1.0
  Rb  Rb2  1  0.230  0.891  0.907  1.0
  Rb  Rb3  1  0.730  0.609  0.093  1.0
  Rb  Rb4  1  0.729  0.169  0.907  1.0
  Rb  Rb5  1  0.229  0.331  0.093  1.0
  Rb  Rb6  1  0.271  0.669  0.593  1.0
  Rb  Rb7  1  0.771  0.831  0.407  1.0
  V  V8  1  0.746  0.243  0.308  1.0
  V  V9  1  0.246  0.257  0.692  1.0
  V  V10  1  0.754  0.757  0.808  1.0
  V  V11  1  0.254  0.743  0.192  1.0
  P  P12  1  0.586  0.010  0.662  1.0
  P  P13  1  0.086  0.490  0.338  1.0
  P  P14  1  0.414  0.510  0.838  1.0
  P  P15  1  0.914  0.990  0.162  1.0
  P  P16  1  0.494  0.530  0.349  1.0
  P  P17  1  0.006  0.470  0.849  1.0
  P  P18  1  0.506  0.030  0.151  1.0
  P  P19  1  0.994  0.970  0.651  1.0
  O  O20  1  0.525  0.923  0.571  1.0
  O  O21  1  0.025  0.577  0.429  1.0
  O  O22  1  0.475  0.423  0.929  1.0
  O  O23  1  0.975  0.077  0.071  1.0
  O  O24  1  0.591  0.924  0.765  1.0
  O  O25  1  0.091  0.576  0.235  1.0
  O  O26  1  0.409  0.424  0.735  1.0
  O  O27  1  0.909  0.076  0.265  1.0
  O  O28  1  0.303  0.432  0.352  1.0
  O  O29  1  0.803  0.068  0.648  1.0
  O  O30  1  0.697  0.932  0.148  1.0
  O  O31  1  0.197  0.568  0.852  1.0
  O  O32  1  0.488  0.157  0.680  1.0
  O  O33  1  0.988  0.343  0.320  1.0
  O  O34  1  0.512  0.657  0.820  1.0
  O  O35  1  0.012  0.843  0.180  1.0
  O  O36  1  0.555  0.171  0.211  1.0
  O  O37  1  0.055  0.329  0.789  1.0
  O  O38  1  0.445  0.671  0.289  1.0
  O  O39  1  0.945  0.829  0.711  1.0
  O  O40  1  0.868  0.561  0.784  1.0
  O  O41  1  0.368  0.939  0.216  1.0
  O  O42  1  0.132  0.061  0.716  1.0
  O  O43  1  0.632  0.439  0.284  1.0
  O  O44  1  0.827  0.805  0.922  1.0
  O  O45  1  0.327  0.695  0.078  1.0
  O  O46  1  0.555  0.562  0.457  1.0
  O  O47  1  0.673  0.195  0.422  1.0
  O  O48  1  0.945  0.438  0.957  1.0
  O  O49  1  0.445  0.062  0.043  1.0
  O  O50  1  0.055  0.938  0.543  1.0
  O  O51  1  0.173  0.305  0.578  1.0
[/CIF]
.
The crystal structure described by Rb2V(PO4)2 crystallizes in the orthorhombic P2_12_12_1 space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(8), and two equivalent O(7) atoms. In the second Rb site, Rb(2) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(4), one O(5), one O(7), two equivalent O(1), and two equivalent O(8) atoms. V(1) is bonded to one O(2), one O(4), one O(5), one O(6), and one O(7) atom to form distorted VO5 trigonal bipyramids that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with two equivalent V(1)O5 trigonal bipyramids. In the second P site, P(2) is bonded to one O(3), one O(5), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with two equivalent V(1)O5 trigonal bipyramids. There are eight inequivalent O sites. In the first O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Rb(1), one Rb(2), one V(1), and one P(1) atom. In the second O site, O(5) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one V(1), and one P(2) atom. In the third O site, O(6) is bonded in a 3-coordinate geometry to one Rb(1), one V(1), and one P(2) atom. In the fourth O site, O(7) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one V(1) atom. In the fifth O site, O(8) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one P(2) atom. In the sixth O site, O(1) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one P(1) atom. In the seventh O site, O(2) is bonded in a 2-coordinate geometry to one Rb(1), one Rb(2), one V(1), and one P(1) atom. In the eighth O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Rb(1), one Rb(2), one P(1), and one P(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb2V(PO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.042
_cell_length_b   9.081
_cell_length_c   12.865
_cell_angle_alpha   89.996
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   822.754
_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
  Rb  Rb0  1  0.769  0.391  0.593  1.0
  Rb  Rb1  1  0.269  0.109  0.407  1.0
  Rb  Rb2  1  0.230  0.891  0.907  1.0
  Rb  Rb3  1  0.730  0.609  0.093  1.0
  Rb  Rb4  1  0.729  0.169  0.907  1.0
  Rb  Rb5  1  0.229  0.331  0.093  1.0
  Rb  Rb6  1  0.271  0.669  0.593  1.0
  Rb  Rb7  1  0.771  0.831  0.407  1.0
  V  V8  1  0.746  0.243  0.308  1.0
  V  V9  1  0.246  0.257  0.692  1.0
  V  V10  1  0.754  0.757  0.808  1.0
  V  V11  1  0.254  0.743  0.192  1.0
  P  P12  1  0.586  0.010  0.662  1.0
  P  P13  1  0.086  0.490  0.338  1.0
  P  P14  1  0.414  0.510  0.838  1.0
  P  P15  1  0.914  0.990  0.162  1.0
  P  P16  1  0.494  0.530  0.349  1.0
  P  P17  1  0.006  0.470  0.849  1.0
  P  P18  1  0.506  0.030  0.151  1.0
  P  P19  1  0.994  0.970  0.651  1.0
  O  O20  1  0.525  0.923  0.571  1.0
  O  O21  1  0.025  0.577  0.429  1.0
  O  O22  1  0.475  0.423  0.929  1.0
  O  O23  1  0.975  0.077  0.071  1.0
  O  O24  1  0.591  0.924  0.765  1.0
  O  O25  1  0.091  0.576  0.235  1.0
  O  O26  1  0.409  0.424  0.735  1.0
  O  O27  1  0.909  0.076  0.265  1.0
  O  O28  1  0.303  0.432  0.352  1.0
  O  O29  1  0.803  0.068  0.648  1.0
  O  O30  1  0.697  0.932  0.148  1.0
  O  O31  1  0.197  0.568  0.852  1.0
  O  O32  1  0.488  0.157  0.680  1.0
  O  O33  1  0.988  0.343  0.320  1.0
  O  O34  1  0.512  0.657  0.820  1.0
  O  O35  1  0.012  0.843  0.180  1.0
  O  O36  1  0.555  0.171  0.211  1.0
  O  O37  1  0.055  0.329  0.789  1.0
  O  O38  1  0.445  0.671  0.289  1.0
  O  O39  1  0.945  0.829  0.711  1.0
  O  O40  1  0.868  0.561  0.784  1.0
  O  O41  1  0.368  0.939  0.216  1.0
  O  O42  1  0.132  0.061  0.716  1.0
  O  O43  1  0.632  0.439  0.284  1.0
  O  O44  1  0.827  0.805  0.922  1.0
  O  O45  1  0.327  0.695  0.078  1.0
  O  O46  1  0.555  0.562  0.457  1.0
  O  O47  1  0.673  0.195  0.422  1.0
  O  O48  1  0.945  0.438  0.957  1.0
  O  O49  1  0.445  0.062  0.043  1.0
  O  O50  1  0.055  0.938  0.543  1.0
  O  O51  1  0.173  0.305  0.578  1.0
[/CIF]
.