Eurostat, Luxembourg. 2511 (01/1988-..) Natural barium sulphate `barytes`, natural barium carbonate `witherite`, whether or not calcined (excl. barium oxide): CN 2511 /Exports /Unit = Prices (Euro/ton) /Partner: Serbia /Reporter: Eur27_2020 /2511:Natural Barium Sulphate `barytes`; Natural Barium Carbonate `witherite`, Whether or not Calcined (Excl. Barium Oxide).