The material structure described by Rb2Si2O5 crystallizes in the monoclinic C2/c space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to one O(2), one O(5), two equivalent O(1), and two equivalent O(3) atoms. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(6), and two equivalent O(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form corner-sharing SiO4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form corner-sharing SiO4 tetrahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Rb(2), two equivalent Rb(1), one Si(1), and one Si(2) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to two equivalent Rb(2) and two equivalent Si(2) atoms. In the fifth O site, O(5) is bonded in a distorted linear geometry to one Rb(1), one Rb(2), one Si(1), and one Si(2) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to two equivalent Rb(2) and two equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_Rb2Si2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.619
_cell_length_b   6.619
_cell_length_c   14.743
_cell_angle_alpha   89.748
_cell_angle_beta   89.748
_cell_angle_gamma   77.841
_symmetry_Int_Tables_number   1
_cell_volume   631.446
_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  0.053  0.274  0.414  1.0
  Rb  Rb1  1  0.726  0.947  0.086  1.0
  Rb  Rb2  1  0.947  0.726  0.586  1.0
  Rb  Rb3  1  0.274  0.053  0.914  1.0
  Rb  Rb4  1  0.288  0.542  0.099  1.0
  Rb  Rb5  1  0.458  0.712  0.401  1.0
  Rb  Rb6  1  0.712  0.458  0.901  1.0
  Rb  Rb7  1  0.542  0.288  0.599  1.0
  Si  Si8  1  0.804  0.439  0.186  1.0
  Si  Si9  1  0.796  0.945  0.806  1.0
  Si  Si10  1  0.055  0.204  0.694  1.0
  Si  Si11  1  0.204  0.055  0.194  1.0
  Si  Si12  1  0.945  0.796  0.306  1.0
  Si  Si13  1  0.439  0.804  0.686  1.0
  Si  Si14  1  0.196  0.561  0.814  1.0
  Si  Si15  1  0.561  0.196  0.314  1.0
  O  O16  1  0.997  0.753  0.807  1.0
  O  O17  1  0.496  0.729  0.586  1.0
  O  O18  1  0.271  0.504  0.914  1.0
  O  O19  1  0.504  0.271  0.414  1.0
  O  O20  1  0.729  0.496  0.086  1.0
  O  O21  1  0.707  0.012  0.903  1.0
  O  O22  1  0.988  0.293  0.597  1.0
  O  O23  1  0.293  0.988  0.097  1.0
  O  O24  1  0.135  0.865  0.250  1.0
  O  O25  1  0.865  0.135  0.750  1.0
  O  O26  1  0.871  0.633  0.237  1.0
  O  O27  1  0.367  0.129  0.263  1.0
  O  O28  1  0.129  0.367  0.763  1.0
  O  O29  1  0.633  0.871  0.737  1.0
  O  O30  1  0.621  0.379  0.250  1.0
  O  O31  1  0.379  0.621  0.750  1.0
  O  O32  1  0.003  0.247  0.193  1.0
  O  O33  1  0.753  0.997  0.307  1.0
  O  O34  1  0.247  0.003  0.693  1.0
  O  O35  1  0.012  0.707  0.403  1.0
[/CIF]
.
The material structure described by Rb2Si2O5 crystallizes in the monoclinic C2/c space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 6-coordinate geometry to one O(2), one O(5), two equivalent O(1), and two equivalent O(3) atoms. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(6), and two equivalent O(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form corner-sharing SiO4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form corner-sharing SiO4 tetrahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a linear geometry to one Rb(2), two equivalent Rb(1), one Si(1), and one Si(2) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Rb(1), two equivalent Rb(2), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Rb(2), two equivalent Rb(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to two equivalent Rb(2) and two equivalent Si(2) atoms. In the fifth O site, O(5) is bonded in a distorted linear geometry to one Rb(1), one Rb(2), one Si(1), and one Si(2) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to two equivalent Rb(2) and two equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_Rb2Si2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.619
_cell_length_b   6.619
_cell_length_c   14.743
_cell_angle_alpha   89.748
_cell_angle_beta   89.748
_cell_angle_gamma   77.841
_symmetry_Int_Tables_number   1
_cell_volume   631.446
_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  0.053  0.274  0.414  1.0
  Rb  Rb1  1  0.726  0.947  0.086  1.0
  Rb  Rb2  1  0.947  0.726  0.586  1.0
  Rb  Rb3  1  0.274  0.053  0.914  1.0
  Rb  Rb4  1  0.288  0.542  0.099  1.0
  Rb  Rb5  1  0.458  0.712  0.401  1.0
  Rb  Rb6  1  0.712  0.458  0.901  1.0
  Rb  Rb7  1  0.542  0.288  0.599  1.0
  Si  Si8  1  0.804  0.439  0.186  1.0
  Si  Si9  1  0.796  0.945  0.806  1.0
  Si  Si10  1  0.055  0.204  0.694  1.0
  Si  Si11  1  0.204  0.055  0.194  1.0
  Si  Si12  1  0.945  0.796  0.306  1.0
  Si  Si13  1  0.439  0.804  0.686  1.0
  Si  Si14  1  0.196  0.561  0.814  1.0
  Si  Si15  1  0.561  0.196  0.314  1.0
  O  O16  1  0.997  0.753  0.807  1.0
  O  O17  1  0.496  0.729  0.586  1.0
  O  O18  1  0.271  0.504  0.914  1.0
  O  O19  1  0.504  0.271  0.414  1.0
  O  O20  1  0.729  0.496  0.086  1.0
  O  O21  1  0.707  0.012  0.903  1.0
  O  O22  1  0.988  0.293  0.597  1.0
  O  O23  1  0.293  0.988  0.097  1.0
  O  O24  1  0.135  0.865  0.250  1.0
  O  O25  1  0.865  0.135  0.750  1.0
  O  O26  1  0.871  0.633  0.237  1.0
  O  O27  1  0.367  0.129  0.263  1.0
  O  O28  1  0.129  0.367  0.763  1.0
  O  O29  1  0.633  0.871  0.737  1.0
  O  O30  1  0.621  0.379  0.250  1.0
  O  O31  1  0.379  0.621  0.750  1.0
  O  O32  1  0.003  0.247  0.193  1.0
  O  O33  1  0.753  0.997  0.307  1.0
  O  O34  1  0.247  0.003  0.693  1.0
  O  O35  1  0.012  0.707  0.403  1.0
[/CIF]
.