data_9007639
_publ_section_title
;
 Structures of potassium sodium sulphate and tripotassium sodium disulphate
;
_journal_name_full               'Acta Crystallographica, Section B'
_journal_page_first              919
_journal_page_last               921
_journal_paper_doi               10.1107/S0567740880004852
_journal_volume                  36
_journal_year                    1980
_chemical_formula_sum            'K3 Na O8 S2'
_chemical_name_mineral           Aphthitalite
_space_group_IT_number           164
_symmetry_space_group_name_Hall  '-P 3 2"'
_symmetry_space_group_name_H-M   'P -3 m 1'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_length_a                   5.6801
_cell_length_b                   5.6801
_cell_length_c                   7.309
_cell_volume                     204.221
_exptl_crystal_density_diffrn    2.703
_[local]_cod_chemical_formula_sum_orig 'K3 Na S2 O8'
_cod_database_code               9007639
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-y,-x,z
y,-x+y,-z
-x,-x+y,-z
-x+y,-x,z
-x+y,y,z
-x,-y,-z
y,x,-z
-y,x-y,z
x,x-y,z
x-y,x,-z
x-y,-y,-z
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
K1 0.00000 0.00000 0.00000
Na2 0.00000 0.00000 0.50000
K3 0.66667 0.33333 0.68310
S 0.66667 0.33333 0.23380
O1 0.66667 0.33333 0.03160
O2 0.80730 -0.80730 0.30180
