The compound described by Rb2U5(PO7)4 crystallizes in the monoclinic Cm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 10-coordinate geometry to one O(15), one O(16), two equivalent O(14), two equivalent O(2), two equivalent O(5), and two equivalent O(8) atoms. In the second Rb site, Rb(2) is bonded to one O(11), one O(12), one O(16), two equivalent O(1), and two equivalent O(9) atoms to form RbO7 hexagonal pyramids that share corners with two equivalent U(3)O7 pentagonal bipyramids. There are three inequivalent U sites. In the first U site, U(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom. In the second U site, U(2) is bonded in a 7-coordinate geometry to one O(10), one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. In the third U site, U(3) is bonded to one O(11), one O(12), one O(15), two equivalent O(13), and two equivalent O(14) atoms to form distorted UO7 pentagonal bipyramids that share corners with two equivalent Rb(2)O7 hexagonal pyramids, 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(13), one O(3), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one U(3)O7 pentagonal bipyramid. In the second P site, P(2) is bonded to one O(10), one O(14), one O(4), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one U(3)O7 pentagonal bipyramid. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Rb(2) and one U(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Rb(1) and one U(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one U(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one U(1), one U(2), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Rb(1), one U(1), one U(2), and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one U(1), one U(2), and one P(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one U(1), one U(2), and one P(1) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one Rb(1) and one U(2) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Rb(2) and one U(2) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one U(2) and one P(2) atom. In the eleventh O site, O(11) is bonded in a single-bond geometry to one Rb(2) and one U(3) atom. In the twelfth O site, O(12) is bonded in a single-bond geometry to one Rb(2) and one U(3) atom. In the thirteenth O site, O(13) is bonded in a distorted linear geometry to one U(3) and one P(1) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one Rb(1), one U(3), and one P(2) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 120 degrees geometry to one Rb(1) and one U(3) atom. In the sixteenth O site, O(16) is bonded in a bent 150 degrees geometry to one Rb(1) and one Rb(2) atom. is represented by the CIF card [CIF]
data_Rb2U5(PO7)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.321
_cell_length_b   10.321
_cell_length_c   9.516
_cell_angle_alpha   64.299
_cell_angle_beta   64.299
_cell_angle_gamma   100.580
_symmetry_Int_Tables_number   1
_cell_volume   731.736
_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
  Rb  Rb0  1  0.651  0.651  0.433  1.0
  Rb  Rb1  1  0.214  0.214  0.429  1.0
  U  U2  1  0.732  0.265  0.697  1.0
  U  U3  1  0.265  0.732  0.697  1.0
  U  U4  1  0.124  0.671  0.202  1.0
  U  U5  1  0.671  0.124  0.202  1.0
  U  U6  1  0.711  0.711  0.909  1.0
  P  P7  1  0.948  0.513  0.716  1.0
  P  P8  1  0.513  0.948  0.716  1.0
  P  P9  1  0.853  0.479  0.184  1.0
  P  P10  1  0.479  0.853  0.184  1.0
  O  O11  1  0.882  0.199  0.616  1.0
  O  O12  1  0.199  0.882  0.616  1.0
  O  O13  1  0.594  0.346  0.766  1.0
  O  O14  1  0.346  0.594  0.766  1.0
  O  O15  1  0.116  0.555  0.679  1.0
  O  O16  1  0.555  0.116  0.679  1.0
  O  O17  1  0.038  0.599  0.021  1.0
  O  O18  1  0.599  0.038  0.021  1.0
  O  O19  1  0.841  0.456  0.365  1.0
  O  O20  1  0.456  0.841  0.365  1.0
  O  O21  1  0.955  0.538  0.539  1.0
  O  O22  1  0.538  0.955  0.539  1.0
  O  O23  1  0.833  0.327  0.869  1.0
  O  O24  1  0.327  0.833  0.869  1.0
  O  O25  1  0.040  0.812  0.175  1.0
  O  O26  1  0.812  0.040  0.175  1.0
  O  O27  1  0.193  0.519  0.240  1.0
  O  O28  1  0.519  0.193  0.240  1.0
  O  O29  1  0.814  0.318  0.204  1.0
  O  O30  1  0.318  0.814  0.204  1.0
  O  O31  1  0.535  0.535  0.011  1.0
  O  O32  1  0.887  0.887  0.809  1.0
  O  O33  1  0.876  0.611  0.779  1.0
  O  O34  1  0.611  0.876  0.779  1.0
  O  O35  1  0.745  0.553  0.152  1.0
  O  O36  1  0.553  0.745  0.152  1.0
  O  O37  1  0.803  0.803  0.600  1.0
  O  O38  1  0.349  0.349  0.593  1.0
[/CIF]
.
The compound described by Rb2U5(PO7)4 crystallizes in the monoclinic Cm space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 10-coordinate geometry to one O(15), one O(16), two equivalent O(14), two equivalent O(2), two equivalent O(5), and two equivalent O(8) atoms. In the second Rb site, Rb(2) is bonded to one O(11), one O(12), one O(16), two equivalent O(1), and two equivalent O(9) atoms to form RbO7 hexagonal pyramids that share corners with two equivalent U(3)O7 pentagonal bipyramids. There are three inequivalent U sites. In the first U site, U(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom. In the second U site, U(2) is bonded in a 7-coordinate geometry to one O(10), one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. In the third U site, U(3) is bonded to one O(11), one O(12), one O(15), two equivalent O(13), and two equivalent O(14) atoms to form distorted UO7 pentagonal bipyramids that share corners with two equivalent Rb(2)O7 hexagonal pyramids, 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(13), one O(3), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one U(3)O7 pentagonal bipyramid. In the second P site, P(2) is bonded to one O(10), one O(14), one O(4), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one U(3)O7 pentagonal bipyramid. There are sixteen inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Rb(2) and one U(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Rb(1) and one U(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one U(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one U(1), one U(2), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Rb(1), one U(1), one U(2), and one P(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one U(1), one U(2), and one P(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one U(1), one U(2), and one P(1) atom. In the eighth O site, O(8) is bonded in a single-bond geometry to one Rb(1) and one U(2) atom. In the ninth O site, O(9) is bonded in a distorted single-bond geometry to one Rb(2) and one U(2) atom. In the tenth O site, O(10) is bonded in a bent 150 degrees geometry to one U(2) and one P(2) atom. In the eleventh O site, O(11) is bonded in a single-bond geometry to one Rb(2) and one U(3) atom. In the twelfth O site, O(12) is bonded in a single-bond geometry to one Rb(2) and one U(3) atom. In the thirteenth O site, O(13) is bonded in a distorted linear geometry to one U(3) and one P(1) atom. In the fourteenth O site, O(14) is bonded in a distorted single-bond geometry to one Rb(1), one U(3), and one P(2) atom. In the fifteenth O site, O(15) is bonded in a distorted bent 120 degrees geometry to one Rb(1) and one U(3) atom. In the sixteenth O site, O(16) is bonded in a bent 150 degrees geometry to one Rb(1) and one Rb(2) atom. is represented by the CIF card [CIF]
data_Rb2U5(PO7)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.321
_cell_length_b   10.321
_cell_length_c   9.516
_cell_angle_alpha   64.299
_cell_angle_beta   64.299
_cell_angle_gamma   100.580
_symmetry_Int_Tables_number   1
_cell_volume   731.736
_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
  Rb  Rb0  1  0.651  0.651  0.433  1.0
  Rb  Rb1  1  0.214  0.214  0.429  1.0
  U  U2  1  0.732  0.265  0.697  1.0
  U  U3  1  0.265  0.732  0.697  1.0
  U  U4  1  0.124  0.671  0.202  1.0
  U  U5  1  0.671  0.124  0.202  1.0
  U  U6  1  0.711  0.711  0.909  1.0
  P  P7  1  0.948  0.513  0.716  1.0
  P  P8  1  0.513  0.948  0.716  1.0
  P  P9  1  0.853  0.479  0.184  1.0
  P  P10  1  0.479  0.853  0.184  1.0
  O  O11  1  0.882  0.199  0.616  1.0
  O  O12  1  0.199  0.882  0.616  1.0
  O  O13  1  0.594  0.346  0.766  1.0
  O  O14  1  0.346  0.594  0.766  1.0
  O  O15  1  0.116  0.555  0.679  1.0
  O  O16  1  0.555  0.116  0.679  1.0
  O  O17  1  0.038  0.599  0.021  1.0
  O  O18  1  0.599  0.038  0.021  1.0
  O  O19  1  0.841  0.456  0.365  1.0
  O  O20  1  0.456  0.841  0.365  1.0
  O  O21  1  0.955  0.538  0.539  1.0
  O  O22  1  0.538  0.955  0.539  1.0
  O  O23  1  0.833  0.327  0.869  1.0
  O  O24  1  0.327  0.833  0.869  1.0
  O  O25  1  0.040  0.812  0.175  1.0
  O  O26  1  0.812  0.040  0.175  1.0
  O  O27  1  0.193  0.519  0.240  1.0
  O  O28  1  0.519  0.193  0.240  1.0
  O  O29  1  0.814  0.318  0.204  1.0
  O  O30  1  0.318  0.814  0.204  1.0
  O  O31  1  0.535  0.535  0.011  1.0
  O  O32  1  0.887  0.887  0.809  1.0
  O  O33  1  0.876  0.611  0.779  1.0
  O  O34  1  0.611  0.876  0.779  1.0
  O  O35  1  0.745  0.553  0.152  1.0
  O  O36  1  0.553  0.745  0.152  1.0
  O  O37  1  0.803  0.803  0.600  1.0
  O  O38  1  0.349  0.349  0.593  1.0
[/CIF]
.