Genuine spare part for select models of Hoover fridge freezers. Faulty products will replaced upon receipt of the faulty item unless authorized by us.
Strontium was recognized as a new element in 1790 when Adair Crawford analyzed a mineral sample from a lead mine near Strontian, Scotland. Until then scientists had thought strontium and barium were the same element, and only bariumâs existence had been recognized. The mineral took its name from the Scottish town and was called strontianite (strontium carbonate).
He named the new element that was producing the green line thallium, after the greek word for 'green twig', thallos. He isolated samples of thallium the next year.Thallium is found in the minerals crooksite (CuThSe), lorandite (TlAsS 2) and hutchinsonite ((Pb, Tl) 2 As 5 S 9), but is usually obtained as a byproduct of the production of sulfuric acid or as a byproduct of refining zinc or lead.istory and Uses: Thallium was discovered spectroscopically by Sir William Crookes, an English chemist, in 1861. Crooks had obtained the sludge left over from the production of sulfuric acid (H 2 SO 4) from a friend.