The crystal structure described by Na5(SiO3)6 crystallizes in the triclinic P-1 space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to two equivalent O(3), two equivalent O(5), and two equivalent O(9) atoms. In the second Na site, Na(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(5), two equivalent O(6), and two equivalent O(8) atoms. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), and two equivalent O(7) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form corner-sharing SiO4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(4), one O(6), and one O(9) atom to form corner-sharing SiO4 tetrahedra. In the third Si site, Si(3) is bonded to one O(1), one O(5), one O(7), and one O(8) atom to form corner-sharing SiO4 tetrahedra. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Na(2), one Na(3), one Si(2), and one Si(3) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Na(2) and one Si(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Na(1), one Na(3), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Na(3), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded to one Na(1), one Na(2), one Si(1), and one Si(3) atom to form distorted corner-sharing ONa2Si2 tetrahedra. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Na(2) and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to two equivalent Na(3) and one Si(3) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent Na(2) and one Si(3) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Na(1) and one Si(2) atom. is represented by the CIF file [CIF]
data_Na5(SiO3)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.817
_cell_length_b   8.337
_cell_length_c   9.607
_cell_angle_alpha   65.341
_cell_angle_beta   69.081
_cell_angle_gamma   57.460
_symmetry_Int_Tables_number   1
_cell_volume   472.451
_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
  Na  Na0  1  0.000  0.500  0.500  1.0
  Na  Na1  1  0.905  0.324  0.008  1.0
  Na  Na2  1  0.674  0.055  0.515  1.0
  Na  Na3  1  0.095  0.676  0.992  1.0
  Na  Na4  1  0.326  0.945  0.485  1.0
  Si  Si5  1  0.189  0.809  0.259  1.0
  Si  Si6  1  0.811  0.191  0.741  1.0
  Si  Si7  1  0.648  0.580  0.271  1.0
  Si  Si8  1  0.433  0.387  0.238  1.0
  Si  Si9  1  0.352  0.420  0.729  1.0
  Si  Si10  1  0.567  0.613  0.762  1.0
  O  O11  1  0.623  0.395  0.271  1.0
  O  O12  1  0.377  0.605  0.729  1.0
  O  O13  1  0.086  1.000  0.118  1.0
  O  O14  1  0.009  0.878  0.403  1.0
  O  O15  1  0.914  0.000  0.882  1.0
  O  O16  1  0.991  0.122  0.597  1.0
  O  O17  1  0.414  0.772  0.273  1.0
  O  O18  1  0.221  0.602  0.246  1.0
  O  O19  1  0.586  0.228  0.727  1.0
  O  O20  1  0.779  0.398  0.754  1.0
  O  O21  1  0.826  0.610  0.128  1.0
  O  O22  1  0.411  0.194  0.342  1.0
  O  O23  1  0.509  0.596  0.957  1.0
  O  O24  1  0.257  0.467  0.584  1.0
  O  O25  1  0.491  0.404  0.043  1.0
  O  O26  1  0.743  0.533  0.416  1.0
  O  O27  1  0.589  0.806  0.658  1.0
  O  O28  1  0.174  0.390  0.872  1.0
[/CIF]
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The crystal structure described by Na5(SiO3)6 crystallizes in the triclinic P-1 space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to two equivalent O(3), two equivalent O(5), and two equivalent O(9) atoms. In the second Na site, Na(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(5), two equivalent O(6), and two equivalent O(8) atoms. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(4), and two equivalent O(7) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form corner-sharing SiO4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(4), one O(6), and one O(9) atom to form corner-sharing SiO4 tetrahedra. In the third Si site, Si(3) is bonded to one O(1), one O(5), one O(7), and one O(8) atom to form corner-sharing SiO4 tetrahedra. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Na(2), one Na(3), one Si(2), and one Si(3) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Na(2) and one Si(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Na(1), one Na(3), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Na(3), one Si(1), and one Si(2) atom. In the fifth O site, O(5) is bonded to one Na(1), one Na(2), one Si(1), and one Si(3) atom to form distorted corner-sharing ONa2Si2 tetrahedra. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Na(2) and one Si(2) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to two equivalent Na(3) and one Si(3) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent Na(2) and one Si(3) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Na(1) and one Si(2) atom. is represented by the CIF file [CIF]
data_Na5(SiO3)6
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.817
_cell_length_b   8.337
_cell_length_c   9.607
_cell_angle_alpha   65.341
_cell_angle_beta   69.081
_cell_angle_gamma   57.460
_symmetry_Int_Tables_number   1
_cell_volume   472.451
_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
  Na  Na0  1  0.000  0.500  0.500  1.0
  Na  Na1  1  0.905  0.324  0.008  1.0
  Na  Na2  1  0.674  0.055  0.515  1.0
  Na  Na3  1  0.095  0.676  0.992  1.0
  Na  Na4  1  0.326  0.945  0.485  1.0
  Si  Si5  1  0.189  0.809  0.259  1.0
  Si  Si6  1  0.811  0.191  0.741  1.0
  Si  Si7  1  0.648  0.580  0.271  1.0
  Si  Si8  1  0.433  0.387  0.238  1.0
  Si  Si9  1  0.352  0.420  0.729  1.0
  Si  Si10  1  0.567  0.613  0.762  1.0
  O  O11  1  0.623  0.395  0.271  1.0
  O  O12  1  0.377  0.605  0.729  1.0
  O  O13  1  0.086  1.000  0.118  1.0
  O  O14  1  0.009  0.878  0.403  1.0
  O  O15  1  0.914  0.000  0.882  1.0
  O  O16  1  0.991  0.122  0.597  1.0
  O  O17  1  0.414  0.772  0.273  1.0
  O  O18  1  0.221  0.602  0.246  1.0
  O  O19  1  0.586  0.228  0.727  1.0
  O  O20  1  0.779  0.398  0.754  1.0
  O  O21  1  0.826  0.610  0.128  1.0
  O  O22  1  0.411  0.194  0.342  1.0
  O  O23  1  0.509  0.596  0.957  1.0
  O  O24  1  0.257  0.467  0.584  1.0
  O  O25  1  0.491  0.404  0.043  1.0
  O  O26  1  0.743  0.533  0.416  1.0
  O  O27  1  0.589  0.806  0.658  1.0
  O  O28  1  0.174  0.390  0.872  1.0
[/CIF]
.