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Group: Christians, Assyrian (Assyrian Church of the East)

Gay-Lussac and Thénard first obtain impure silicon …

Years: 1811 - 1811

Gay-Lussac and Thénard first obtain impure silicon in 1811 by passing silicon fluoride over heated potassium, but they fail to identity it as an element.

This same year, Bernard Courtois, a manufacturer of saltpeter from seaweeds, observes an unknown element when he obtains a violet vapor by heating seaweed ashes with sulfuric acid, a process used as a source of sodium and potassium salts.

This vapor condenses to a black crystalline substance with a metallic luster, which he calls “substance X”.

It will later be named iodine.

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