H12 Mg O9 S Flack H Acta Crystallographica B29 (1973) 656-658 Etude de la structure cristalline du sulfite de magnesium hexahydrate, Mg S O3 (H2 O)6 _cod_database_code 1100103 _database_code_amcsd 0018267 8.830 8.830 9.075 90 90 120 R3 atom x y z Mg1 0 0 0 S1 0 0 .5001 O1 .1271 .1775 .4303 O2 -.1951 -.1975 -.1249 O3 .1845 .1931 .1392