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Pyrochlore from Russia
Pyrochlore from Russia
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Niobium
Niobium
English chemist Charles Hatchett identified the element columbium in 1801 within a mineral discovered in Connecticut, US.
English chemist Charles Hatchett identified the element columbium in 1801 within a mineral discovered in Connecticut, US.
Picture of a Hellenistic sculpture representing Niobe by Giorgio Sommer
Picture of a Hellenistic sculpture representing Niobe by Giorgio Sommer
A very pure sample of niobium pentachloride
A very pure sample of niobium pentachloride