Note 2 — Chapter XII · SODIUM
George Kamensky translation
Anhydrous (ignited) sodium sulphate, Na2SO4, is known in trade as ‘sulphate’ or salt-cake, in mineralogy thenardite. Crystalline decahydrated salt is termed in mineralogy mirabilite, and in trade Glauber's salt. On fusing it, the monohydrate Na2SO4H2O is obtained, together with a supersaturated solution.