The crystal structure described by Na2S5 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 7-coordinate geometry to one S(2), two equivalent S(1), and four equivalent S(3) atoms. In the second Na site, Na(2) is bonded to two equivalent S(1) and four equivalent S(3) atoms to form NaS6 octahedra that share corners with four equivalent Na(2)S6 octahedra and corners with four equivalent S(1)Na2S2 tetrahedra. The corner-sharing octahedral tilt angles are 68°. There are three inequivalent S sites. In the first S site, S(1) is bonded to one Na(1), one Na(2), one S(2), and one S(3) atom to form distorted SNa2S2 tetrahedra that share corners with two equivalent Na(2)S6 octahedra,  a cornercorner with one S(1)Na2S2 tetrahedra, and  an edgeedge with one S(1)Na2S2 tetrahedra. The corner-sharing octahedral tilt angles range from 71-72°. In the second S site, S(2) is bonded in a distorted trigonal non-coplanar geometry to one Na(1) and two equivalent S(1) atoms. In the third S site, S(3) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Na(2), and one S(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2S5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.791
_cell_length_b   7.647
_cell_length_c   14.511
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   642.575
_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
  Na  Na0  1  0.202  0.948  0.750  1.0
  Na  Na1  1  0.702  0.552  0.250  1.0
  Na  Na2  1  0.298  0.448  0.750  1.0
  Na  Na3  1  0.798  0.052  0.250  1.0
  Na  Na4  1  0.000  0.000  0.500  1.0
  Na  Na5  1  0.500  0.500  0.500  1.0
  Na  Na6  1  0.500  0.500  0.000  1.0
  Na  Na7  1  0.000  0.000  0.000  1.0
  S  S8  1  0.110  0.457  0.134  1.0
  S  S9  1  0.610  0.043  0.866  1.0
  S  S10  1  0.390  0.957  0.366  1.0
  S  S11  1  0.890  0.543  0.634  1.0
  S  S12  1  0.890  0.543  0.866  1.0
  S  S13  1  0.390  0.957  0.134  1.0
  S  S14  1  0.610  0.043  0.634  1.0
  S  S15  1  0.110  0.457  0.366  1.0
  S  S16  1  0.271  0.358  0.250  1.0
  S  S17  1  0.771  0.142  0.750  1.0
  S  S18  1  0.229  0.858  0.250  1.0
  S  S19  1  0.729  0.642  0.750  1.0
  S  S20  1  0.836  0.297  0.397  1.0
  S  S21  1  0.336  0.203  0.603  1.0
  S  S22  1  0.664  0.797  0.103  1.0
  S  S23  1  0.164  0.703  0.897  1.0
  S  S24  1  0.164  0.703  0.603  1.0
  S  S25  1  0.664  0.797  0.397  1.0
  S  S26  1  0.336  0.203  0.897  1.0
  S  S27  1  0.836  0.297  0.103  1.0
[/CIF]
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The crystal structure described by Na2S5 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 7-coordinate geometry to one S(2), two equivalent S(1), and four equivalent S(3) atoms. In the second Na site, Na(2) is bonded to two equivalent S(1) and four equivalent S(3) atoms to form NaS6 octahedra that share corners with four equivalent Na(2)S6 octahedra and corners with four equivalent S(1)Na2S2 tetrahedra. The corner-sharing octahedral tilt angles are 68°. There are three inequivalent S sites. In the first S site, S(1) is bonded to one Na(1), one Na(2), one S(2), and one S(3) atom to form distorted SNa2S2 tetrahedra that share corners with two equivalent Na(2)S6 octahedra,  a cornercorner with one S(1)Na2S2 tetrahedra, and  an edgeedge with one S(1)Na2S2 tetrahedra. The corner-sharing octahedral tilt angles range from 71-72°. In the second S site, S(2) is bonded in a distorted trigonal non-coplanar geometry to one Na(1) and two equivalent S(1) atoms. In the third S site, S(3) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Na(2), and one S(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2S5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.791
_cell_length_b   7.647
_cell_length_c   14.511
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   642.575
_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
  Na  Na0  1  0.202  0.948  0.750  1.0
  Na  Na1  1  0.702  0.552  0.250  1.0
  Na  Na2  1  0.298  0.448  0.750  1.0
  Na  Na3  1  0.798  0.052  0.250  1.0
  Na  Na4  1  0.000  0.000  0.500  1.0
  Na  Na5  1  0.500  0.500  0.500  1.0
  Na  Na6  1  0.500  0.500  0.000  1.0
  Na  Na7  1  0.000  0.000  0.000  1.0
  S  S8  1  0.110  0.457  0.134  1.0
  S  S9  1  0.610  0.043  0.866  1.0
  S  S10  1  0.390  0.957  0.366  1.0
  S  S11  1  0.890  0.543  0.634  1.0
  S  S12  1  0.890  0.543  0.866  1.0
  S  S13  1  0.390  0.957  0.134  1.0
  S  S14  1  0.610  0.043  0.634  1.0
  S  S15  1  0.110  0.457  0.366  1.0
  S  S16  1  0.271  0.358  0.250  1.0
  S  S17  1  0.771  0.142  0.750  1.0
  S  S18  1  0.229  0.858  0.250  1.0
  S  S19  1  0.729  0.642  0.750  1.0
  S  S20  1  0.836  0.297  0.397  1.0
  S  S21  1  0.336  0.203  0.603  1.0
  S  S22  1  0.664  0.797  0.103  1.0
  S  S23  1  0.164  0.703  0.897  1.0
  S  S24  1  0.164  0.703  0.603  1.0
  S  S25  1  0.664  0.797  0.397  1.0
  S  S26  1  0.336  0.203  0.897  1.0
  S  S27  1  0.836  0.297  0.103  1.0
[/CIF]
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