Na2 O3 S Zachariasen W, Buckley H Physical Review 37 (1931) 1295-1305 The Crystal Lattice of Anhydrous Sodium Sulphite, Na2 S O3 _cod_database_code 1010523 _database_code_amcsd 0017434 5.441 5.441 6.133 90 90 120 P-3 atom x y z Na1 0 0 0 Na2 0 0 .5 Na3 1/3 2/3 2/3 S1 1/3 2/3 1/6 O1 .139 .403 .25