The structure described by Rb4SiO4 crystallizes in the monoclinic P2_1/c space group. There are four inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one O(3), one O(4), two equivalent O(2), and three equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), and two equivalent O(1) atoms. In the third Rb site, Rb(3) is bonded in a 4-coordinate geometry to one O(2), one O(3), and two equivalent O(4) atoms. In the fourth Rb site, Rb(4) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(3), and two equivalent O(4) atoms. Si(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Rb(2), three equivalent Rb(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Rb(2), one Rb(3), one Rb(4), two equivalent Rb(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), one Rb(3), two equivalent Rb(4), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), two equivalent Rb(3), two equivalent Rb(4), and one Si(1) atom. is represented by the CIF file [CIF]
data_Rb4SiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.602
_cell_length_b   10.665
_cell_length_c   10.965
_cell_angle_alpha   67.128
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   711.332
_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  0.578  0.288  0.074  1.0
  Rb  Rb1  1  0.124  0.430  0.149  1.0
  Rb  Rb2  1  0.922  0.788  0.074  1.0
  Rb  Rb3  1  0.325  0.104  0.379  1.0
  Rb  Rb4  1  0.828  0.219  0.411  1.0
  Rb  Rb5  1  0.376  0.930  0.149  1.0
  Rb  Rb6  1  0.175  0.604  0.379  1.0
  Rb  Rb7  1  0.328  0.281  0.589  1.0
  Rb  Rb8  1  0.672  0.719  0.411  1.0
  Rb  Rb9  1  0.825  0.396  0.621  1.0
  Rb  Rb10  1  0.624  0.070  0.851  1.0
  Rb  Rb11  1  0.172  0.781  0.589  1.0
  Rb  Rb12  1  0.675  0.896  0.621  1.0
  Rb  Rb13  1  0.078  0.212  0.926  1.0
  Rb  Rb14  1  0.876  0.570  0.851  1.0
  Rb  Rb15  1  0.422  0.712  0.926  1.0
  Si  Si16  1  0.879  0.015  0.239  1.0
  Si  Si17  1  0.621  0.515  0.239  1.0
  Si  Si18  1  0.379  0.485  0.761  1.0
  Si  Si19  1  0.121  0.985  0.761  1.0
  O  O20  1  0.782  0.019  0.099  1.0
  O  O21  1  0.011  0.157  0.207  1.0
  O  O22  1  0.718  0.519  0.099  1.0
  O  O23  1  0.474  0.379  0.311  1.0
  O  O24  1  0.489  0.657  0.207  1.0
  O  O25  1  0.812  0.508  0.341  1.0
  O  O26  1  0.026  0.879  0.311  1.0
  O  O27  1  0.312  0.992  0.659  1.0
  O  O28  1  0.688  0.008  0.341  1.0
  O  O29  1  0.974  0.121  0.689  1.0
  O  O30  1  0.188  0.492  0.659  1.0
  O  O31  1  0.511  0.343  0.793  1.0
  O  O32  1  0.526  0.621  0.689  1.0
  O  O33  1  0.282  0.481  0.901  1.0
  O  O34  1  0.989  0.843  0.793  1.0
  O  O35  1  0.218  0.981  0.901  1.0
[/CIF]
.
The structure described by Rb4SiO4 crystallizes in the monoclinic P2_1/c space group. There are four inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 7-coordinate geometry to one O(3), one O(4), two equivalent O(2), and three equivalent O(1) atoms. In the second Rb site, Rb(2) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), and two equivalent O(1) atoms. In the third Rb site, Rb(3) is bonded in a 4-coordinate geometry to one O(2), one O(3), and two equivalent O(4) atoms. In the fourth Rb site, Rb(4) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(3), and two equivalent O(4) atoms. Si(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Rb(2), three equivalent Rb(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Rb(2), one Rb(3), one Rb(4), two equivalent Rb(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), one Rb(3), two equivalent Rb(4), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Rb(1), one Rb(2), two equivalent Rb(3), two equivalent Rb(4), and one Si(1) atom. is represented by the CIF file [CIF]
data_Rb4SiO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.602
_cell_length_b   10.665
_cell_length_c   10.965
_cell_angle_alpha   67.128
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   711.332
_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  0.578  0.288  0.074  1.0
  Rb  Rb1  1  0.124  0.430  0.149  1.0
  Rb  Rb2  1  0.922  0.788  0.074  1.0
  Rb  Rb3  1  0.325  0.104  0.379  1.0
  Rb  Rb4  1  0.828  0.219  0.411  1.0
  Rb  Rb5  1  0.376  0.930  0.149  1.0
  Rb  Rb6  1  0.175  0.604  0.379  1.0
  Rb  Rb7  1  0.328  0.281  0.589  1.0
  Rb  Rb8  1  0.672  0.719  0.411  1.0
  Rb  Rb9  1  0.825  0.396  0.621  1.0
  Rb  Rb10  1  0.624  0.070  0.851  1.0
  Rb  Rb11  1  0.172  0.781  0.589  1.0
  Rb  Rb12  1  0.675  0.896  0.621  1.0
  Rb  Rb13  1  0.078  0.212  0.926  1.0
  Rb  Rb14  1  0.876  0.570  0.851  1.0
  Rb  Rb15  1  0.422  0.712  0.926  1.0
  Si  Si16  1  0.879  0.015  0.239  1.0
  Si  Si17  1  0.621  0.515  0.239  1.0
  Si  Si18  1  0.379  0.485  0.761  1.0
  Si  Si19  1  0.121  0.985  0.761  1.0
  O  O20  1  0.782  0.019  0.099  1.0
  O  O21  1  0.011  0.157  0.207  1.0
  O  O22  1  0.718  0.519  0.099  1.0
  O  O23  1  0.474  0.379  0.311  1.0
  O  O24  1  0.489  0.657  0.207  1.0
  O  O25  1  0.812  0.508  0.341  1.0
  O  O26  1  0.026  0.879  0.311  1.0
  O  O27  1  0.312  0.992  0.659  1.0
  O  O28  1  0.688  0.008  0.341  1.0
  O  O29  1  0.974  0.121  0.689  1.0
  O  O30  1  0.188  0.492  0.659  1.0
  O  O31  1  0.511  0.343  0.793  1.0
  O  O32  1  0.526  0.621  0.689  1.0
  O  O33  1  0.282  0.481  0.901  1.0
  O  O34  1  0.989  0.843  0.793  1.0
  O  O35  1  0.218  0.981  0.901  1.0
[/CIF]
.