Tellurium is sometimes found free in nature but is most commonly bonded to Gold and Silver in ores. Tellurium is used as an alloy with Copper and steel to improve its malleability. Tellurium is also used in the electronics industry for making semiconductors and in solar panel production. Tellurium is very toxic and known to cause development issues in embryos. In 1782 Baron Franz Muller von Reichenstein purified what he thought to be Antimony but upon examination in 1798 by Martin Klaproth he isolated Tellurium. It is located in Group 16 as a metal. It has a melting point of 450°c and a boiling point of 990°c.
Franz Müller von Reichenstein