The crystal structure described by Rb4C2H6O9 crystallizes in the monoclinic C2/c space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 11-coordinate geometry to one H(1), two equivalent H(3), one O(3), one O(4), one O(5), two equivalent O(2), and three equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded in a 10-coordinate geometry to two equivalent H(1), two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the third Rb site, Rb(3) is bonded in a 10-coordinate geometry to two equivalent H(2), two equivalent O(1), two equivalent O(2), and four equivalent O(4) atoms. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are three inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), one O(3), and one O(4) atom. In the second H site, H(2) is bonded in a single-bond geometry to one Rb(3) and one O(4) atom. In the third H site, H(3) is bonded in a distorted single-bond geometry to two equivalent Rb(1), one O(3), and one O(5) atom. There are five inequivalent O sites. In the first O site, O(5) is bonded in a water-like geometry to two equivalent Rb(1) and two equivalent H(3) atoms. In the second O site, O(1) is bonded in a distorted single-bond geometry to one Rb(2), one Rb(3), three equivalent Rb(1), and one C(1) atom. In the third O site, O(2) is bonded in a distorted single-bond geometry to one Rb(2), one Rb(3), two equivalent Rb(1), and one C(1) atom. In the fourth O site, O(3) is bonded in a 3-coordinate geometry to one Rb(1), one Rb(2), one C(1), one H(1), and one H(3) atom. In the fifth O site, O(4) is bonded in a water-like geometry to one Rb(1), one Rb(2), two equivalent Rb(3), one H(1), and one H(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb4H6C2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.424
_cell_length_b   9.424
_cell_length_c   7.593
_cell_angle_alpha   70.325
_cell_angle_beta   70.325
_cell_angle_gamma   95.825
_symmetry_Int_Tables_number   1
_cell_volume   580.101
_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
  Rb  Rb0  1  0.994  0.717  0.041  1.0
  Rb  Rb1  1  0.283  0.006  0.459  1.0
  Rb  Rb2  1  0.006  0.283  0.959  1.0
  Rb  Rb3  1  0.717  0.994  0.541  1.0
  Rb  Rb4  1  0.311  0.689  0.250  1.0
  Rb  Rb5  1  0.689  0.311  0.750  1.0
  Rb  Rb6  1  0.618  0.382  0.250  1.0
  Rb  Rb7  1  0.382  0.618  0.750  1.0
  H  H8  1  0.224  0.359  0.536  1.0
  H  H9  1  0.641  0.776  0.964  1.0
  H  H10  1  0.776  0.641  0.464  1.0
  H  H11  1  0.359  0.224  0.036  1.0
  H  H12  1  0.353  0.297  0.622  1.0
  H  H13  1  0.703  0.647  0.878  1.0
  H  H14  1  0.647  0.703  0.378  1.0
  H  H15  1  0.297  0.353  0.122  1.0
  H  H16  1  0.008  0.126  0.655  1.0
  H  H17  1  0.874  0.992  0.845  1.0
  H  H18  1  0.992  0.874  0.345  1.0
  H  H19  1  0.126  0.008  0.155  1.0
  C  C20  1  0.030  0.361  0.344  1.0
  C  C21  1  0.639  0.970  0.156  1.0
  C  C22  1  0.970  0.639  0.656  1.0
  C  C23  1  0.361  0.030  0.844  1.0
  O  O24  1  0.892  0.326  0.350  1.0
  O  O25  1  0.674  0.108  0.150  1.0
  O  O26  1  0.108  0.674  0.650  1.0
  O  O27  1  0.326  0.892  0.850  1.0
  O  O28  1  0.147  0.442  0.169  1.0
  O  O29  1  0.558  0.853  0.331  1.0
  O  O30  1  0.853  0.558  0.831  1.0
  O  O31  1  0.442  0.147  0.669  1.0
  O  O32  1  0.055  0.315  0.512  1.0
  O  O33  1  0.685  0.945  0.988  1.0
  O  O34  1  0.945  0.685  0.488  1.0
  O  O35  1  0.315  0.055  0.012  1.0
  O  O36  1  0.313  0.391  0.571  1.0
  O  O37  1  0.609  0.687  0.929  1.0
  O  O38  1  0.687  0.609  0.429  1.0
  O  O39  1  0.391  0.313  0.071  1.0
  O  O40  1  0.986  0.014  0.750  1.0
  O  O41  1  0.014  0.986  0.250  1.0
[/CIF]
.
The crystal structure described by Rb4C2H6O9 crystallizes in the monoclinic C2/c space group. There are three inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 11-coordinate geometry to one H(1), two equivalent H(3), one O(3), one O(4), one O(5), two equivalent O(2), and three equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded in a 10-coordinate geometry to two equivalent H(1), two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the third Rb site, Rb(3) is bonded in a 10-coordinate geometry to two equivalent H(2), two equivalent O(1), two equivalent O(2), and four equivalent O(4) atoms. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are three inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), one O(3), and one O(4) atom. In the second H site, H(2) is bonded in a single-bond geometry to one Rb(3) and one O(4) atom. In the third H site, H(3) is bonded in a distorted single-bond geometry to two equivalent Rb(1), one O(3), and one O(5) atom. There are five inequivalent O sites. In the first O site, O(5) is bonded in a water-like geometry to two equivalent Rb(1) and two equivalent H(3) atoms. In the second O site, O(1) is bonded in a distorted single-bond geometry to one Rb(2), one Rb(3), three equivalent Rb(1), and one C(1) atom. In the third O site, O(2) is bonded in a distorted single-bond geometry to one Rb(2), one Rb(3), two equivalent Rb(1), and one C(1) atom. In the fourth O site, O(3) is bonded in a 3-coordinate geometry to one Rb(1), one Rb(2), one C(1), one H(1), and one H(3) atom. In the fifth O site, O(4) is bonded in a water-like geometry to one Rb(1), one Rb(2), two equivalent Rb(3), one H(1), and one H(2) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Rb4H6C2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.424
_cell_length_b   9.424
_cell_length_c   7.593
_cell_angle_alpha   70.325
_cell_angle_beta   70.325
_cell_angle_gamma   95.825
_symmetry_Int_Tables_number   1
_cell_volume   580.101
_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
  Rb  Rb0  1  0.994  0.717  0.041  1.0
  Rb  Rb1  1  0.283  0.006  0.459  1.0
  Rb  Rb2  1  0.006  0.283  0.959  1.0
  Rb  Rb3  1  0.717  0.994  0.541  1.0
  Rb  Rb4  1  0.311  0.689  0.250  1.0
  Rb  Rb5  1  0.689  0.311  0.750  1.0
  Rb  Rb6  1  0.618  0.382  0.250  1.0
  Rb  Rb7  1  0.382  0.618  0.750  1.0
  H  H8  1  0.224  0.359  0.536  1.0
  H  H9  1  0.641  0.776  0.964  1.0
  H  H10  1  0.776  0.641  0.464  1.0
  H  H11  1  0.359  0.224  0.036  1.0
  H  H12  1  0.353  0.297  0.622  1.0
  H  H13  1  0.703  0.647  0.878  1.0
  H  H14  1  0.647  0.703  0.378  1.0
  H  H15  1  0.297  0.353  0.122  1.0
  H  H16  1  0.008  0.126  0.655  1.0
  H  H17  1  0.874  0.992  0.845  1.0
  H  H18  1  0.992  0.874  0.345  1.0
  H  H19  1  0.126  0.008  0.155  1.0
  C  C20  1  0.030  0.361  0.344  1.0
  C  C21  1  0.639  0.970  0.156  1.0
  C  C22  1  0.970  0.639  0.656  1.0
  C  C23  1  0.361  0.030  0.844  1.0
  O  O24  1  0.892  0.326  0.350  1.0
  O  O25  1  0.674  0.108  0.150  1.0
  O  O26  1  0.108  0.674  0.650  1.0
  O  O27  1  0.326  0.892  0.850  1.0
  O  O28  1  0.147  0.442  0.169  1.0
  O  O29  1  0.558  0.853  0.331  1.0
  O  O30  1  0.853  0.558  0.831  1.0
  O  O31  1  0.442  0.147  0.669  1.0
  O  O32  1  0.055  0.315  0.512  1.0
  O  O33  1  0.685  0.945  0.988  1.0
  O  O34  1  0.945  0.685  0.488  1.0
  O  O35  1  0.315  0.055  0.012  1.0
  O  O36  1  0.313  0.391  0.571  1.0
  O  O37  1  0.609  0.687  0.929  1.0
  O  O38  1  0.687  0.609  0.429  1.0
  O  O39  1  0.391  0.313  0.071  1.0
  O  O40  1  0.986  0.014  0.750  1.0
  O  O41  1  0.014  0.986  0.250  1.0
[/CIF]
.