Charles Hatchett FRS FRSE was an English mineralogist and analytical chemist who discovered the element niobium, for which he proposed the name "columbium".

Heinrich Rose was a German mineralogist and analytical chemist. He was the brother of the mineralogist Gustav Rose and a son of Valentin Rose. Rose's early works on phosphorescence were noted in the Quarterly Journal of Science in 1821, and on the strength of these works, he was elected privatdozent at the University of Berlin from 1822, then Professor from 1832.