The material described by RbUAsO9 crystallizes in the monoclinic P2/c space group. Rb(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(3), one O(4), one O(5), one O(7), and two equivalent O(11) atoms. There are two inequivalent U sites. In the first U site, U(1) is bonded to one O(3), one O(6), two equivalent O(8), and two equivalent O(9) atoms to form UO6 octahedra that share corners with four equivalent As(1)O4 tetrahedra. In the second U site, U(2) is bonded to one O(10), one O(7), two equivalent O(1), and two equivalent O(2) atoms to form UO6 octahedra that share corners with four equivalent As(2)O4 tetrahedra. There are two inequivalent As sites. In the first As site, As(1) is bonded to two equivalent O(8) and two equivalent O(9) atoms to form AsO4 tetrahedra that share corners with four equivalent U(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-38°. In the second As site, As(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form AsO4 tetrahedra that share corners with four equivalent U(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-43°. There are eleven inequivalent O sites. In the first O site, O(7) is bonded in a single-bond geometry to two equivalent Rb(1) and one U(2) atom. In the second O site, O(8) is bonded in a bent 150 degrees geometry to one U(1) and one As(1) atom. In the third O site, O(9) is bonded in a bent 150 degrees geometry to one U(1) and one As(1) atom. In the fourth O site, O(10) is bonded in a single-bond geometry to two equivalent Rb(1) and one U(2) atom. In the fifth O site, O(1) is bonded in a 3-coordinate geometry to one Rb(1), one U(2), and one As(2) atom. In the sixth O site, O(11) is bonded in an L-shaped geometry to two equivalent Rb(1) atoms. In the seventh O site, O(2) is bonded in a distorted bent 150 degrees geometry to one U(2) and one As(2) atom. In the eighth O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one U(1) atom. In the ninth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Rb(1) and one O(5) atom. In the tenth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Rb(1) and one O(4) atom. In the eleventh O site, O(6) is bonded in a single-bond geometry to one U(1) atom. is represented by the CIF file [CIF]
data_RbUAsO9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   16.640
_cell_length_b   7.221
_cell_length_c   10.189
_cell_angle_alpha   45.994
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   880.705
_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  0.710  0.392  0.011  1.0
  Rb  Rb1  1  0.710  0.608  0.489  1.0
  Rb  Rb2  1  0.290  0.608  0.989  1.0
  Rb  Rb3  1  0.290  0.392  0.511  1.0
  U  U4  1  0.939  0.500  0.750  1.0
  U  U5  1  0.061  0.500  0.250  1.0
  U  U6  1  0.449  0.500  0.750  1.0
  U  U7  1  0.551  0.500  0.250  1.0
  As  As8  1  0.003  0.000  0.750  1.0
  As  As9  1  0.997  0.000  0.250  1.0
  As  As10  1  0.503  0.000  0.750  1.0
  As  As11  1  0.497  0.000  0.250  1.0
  O  O12  1  0.440  0.211  0.726  1.0
  O  O13  1  0.440  0.789  0.774  1.0
  O  O14  1  0.438  0.830  0.441  1.0
  O  O15  1  0.438  0.170  0.059  1.0
  O  O16  1  0.560  0.789  0.274  1.0
  O  O17  1  0.560  0.211  0.226  1.0
  O  O18  1  0.562  0.170  0.559  1.0
  O  O19  1  0.562  0.830  0.941  1.0
  O  O20  1  0.825  0.500  0.750  1.0
  O  O21  1  0.175  0.500  0.250  1.0
  O  O22  1  0.191  0.814  0.615  1.0
  O  O23  1  0.191  0.186  0.885  1.0
  O  O24  1  0.186  0.237  0.977  1.0
  O  O25  1  0.186  0.763  0.523  1.0
  O  O26  1  0.809  0.186  0.385  1.0
  O  O27  1  0.809  0.814  0.115  1.0
  O  O28  1  0.814  0.763  0.023  1.0
  O  O29  1  0.814  0.237  0.477  1.0
  O  O30  1  0.048  0.500  0.750  1.0
  O  O31  1  0.952  0.500  0.250  1.0
  O  O32  1  0.560  0.500  0.750  1.0
  O  O33  1  0.440  0.500  0.250  1.0
  O  O34  1  0.941  0.204  0.737  1.0
  O  O35  1  0.941  0.796  0.763  1.0
  O  O36  1  0.936  0.823  0.440  1.0
  O  O37  1  0.936  0.177  0.060  1.0
  O  O38  1  0.059  0.796  0.263  1.0
  O  O39  1  0.059  0.204  0.237  1.0
  O  O40  1  0.064  0.177  0.560  1.0
  O  O41  1  0.064  0.823  0.940  1.0
  O  O42  1  0.340  0.500  0.750  1.0
  O  O43  1  0.660  0.500  0.250  1.0
  O  O44  1  0.704  0.134  0.864  1.0
  O  O45  1  0.704  0.866  0.636  1.0
  O  O46  1  0.296  0.866  0.136  1.0
  O  O47  1  0.296  0.134  0.364  1.0
[/CIF]
.
The material described by RbUAsO9 crystallizes in the monoclinic P2/c space group. Rb(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(3), one O(4), one O(5), one O(7), and two equivalent O(11) atoms. There are two inequivalent U sites. In the first U site, U(1) is bonded to one O(3), one O(6), two equivalent O(8), and two equivalent O(9) atoms to form UO6 octahedra that share corners with four equivalent As(1)O4 tetrahedra. In the second U site, U(2) is bonded to one O(10), one O(7), two equivalent O(1), and two equivalent O(2) atoms to form UO6 octahedra that share corners with four equivalent As(2)O4 tetrahedra. There are two inequivalent As sites. In the first As site, As(1) is bonded to two equivalent O(8) and two equivalent O(9) atoms to form AsO4 tetrahedra that share corners with four equivalent U(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 36-38°. In the second As site, As(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form AsO4 tetrahedra that share corners with four equivalent U(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-43°. There are eleven inequivalent O sites. In the first O site, O(7) is bonded in a single-bond geometry to two equivalent Rb(1) and one U(2) atom. In the second O site, O(8) is bonded in a bent 150 degrees geometry to one U(1) and one As(1) atom. In the third O site, O(9) is bonded in a bent 150 degrees geometry to one U(1) and one As(1) atom. In the fourth O site, O(10) is bonded in a single-bond geometry to two equivalent Rb(1) and one U(2) atom. In the fifth O site, O(1) is bonded in a 3-coordinate geometry to one Rb(1), one U(2), and one As(2) atom. In the sixth O site, O(11) is bonded in an L-shaped geometry to two equivalent Rb(1) atoms. In the seventh O site, O(2) is bonded in a distorted bent 150 degrees geometry to one U(2) and one As(2) atom. In the eighth O site, O(3) is bonded in a distorted single-bond geometry to two equivalent Rb(1) and one U(1) atom. In the ninth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Rb(1) and one O(5) atom. In the tenth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Rb(1) and one O(4) atom. In the eleventh O site, O(6) is bonded in a single-bond geometry to one U(1) atom. is represented by the CIF file [CIF]
data_RbUAsO9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   16.640
_cell_length_b   7.221
_cell_length_c   10.189
_cell_angle_alpha   45.994
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   880.705
_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  0.710  0.392  0.011  1.0
  Rb  Rb1  1  0.710  0.608  0.489  1.0
  Rb  Rb2  1  0.290  0.608  0.989  1.0
  Rb  Rb3  1  0.290  0.392  0.511  1.0
  U  U4  1  0.939  0.500  0.750  1.0
  U  U5  1  0.061  0.500  0.250  1.0
  U  U6  1  0.449  0.500  0.750  1.0
  U  U7  1  0.551  0.500  0.250  1.0
  As  As8  1  0.003  0.000  0.750  1.0
  As  As9  1  0.997  0.000  0.250  1.0
  As  As10  1  0.503  0.000  0.750  1.0
  As  As11  1  0.497  0.000  0.250  1.0
  O  O12  1  0.440  0.211  0.726  1.0
  O  O13  1  0.440  0.789  0.774  1.0
  O  O14  1  0.438  0.830  0.441  1.0
  O  O15  1  0.438  0.170  0.059  1.0
  O  O16  1  0.560  0.789  0.274  1.0
  O  O17  1  0.560  0.211  0.226  1.0
  O  O18  1  0.562  0.170  0.559  1.0
  O  O19  1  0.562  0.830  0.941  1.0
  O  O20  1  0.825  0.500  0.750  1.0
  O  O21  1  0.175  0.500  0.250  1.0
  O  O22  1  0.191  0.814  0.615  1.0
  O  O23  1  0.191  0.186  0.885  1.0
  O  O24  1  0.186  0.237  0.977  1.0
  O  O25  1  0.186  0.763  0.523  1.0
  O  O26  1  0.809  0.186  0.385  1.0
  O  O27  1  0.809  0.814  0.115  1.0
  O  O28  1  0.814  0.763  0.023  1.0
  O  O29  1  0.814  0.237  0.477  1.0
  O  O30  1  0.048  0.500  0.750  1.0
  O  O31  1  0.952  0.500  0.250  1.0
  O  O32  1  0.560  0.500  0.750  1.0
  O  O33  1  0.440  0.500  0.250  1.0
  O  O34  1  0.941  0.204  0.737  1.0
  O  O35  1  0.941  0.796  0.763  1.0
  O  O36  1  0.936  0.823  0.440  1.0
  O  O37  1  0.936  0.177  0.060  1.0
  O  O38  1  0.059  0.796  0.263  1.0
  O  O39  1  0.059  0.204  0.237  1.0
  O  O40  1  0.064  0.177  0.560  1.0
  O  O41  1  0.064  0.823  0.940  1.0
  O  O42  1  0.340  0.500  0.750  1.0
  O  O43  1  0.660  0.500  0.250  1.0
  O  O44  1  0.704  0.134  0.864  1.0
  O  O45  1  0.704  0.866  0.636  1.0
  O  O46  1  0.296  0.866  0.136  1.0
  O  O47  1  0.296  0.134  0.364  1.0
[/CIF]
.