Lucium was confimed to be an impure sample of yttrium by an English chemist who became the president of what?
Lucium: Lucium was the proposed name for an alleged new element found by chemist Prosper Barrière in 1896 in the mineral monazite. Lucium:  Later, William Crookes confirmed that the new element was actually an impure sample of yttrium. William Crookes: Sir William Crookes {'1': ", '2': ", '3': ", '4': "} ( ; 17 June 1832 – 4 April 1919) was an English chemist and physicist who attended the Royal College of Chemistry in London, and worked on spectroscopy. William Crookes:  Late in life, he became interested in spiritualism, and became the president of the Society for Psychical Research.
i don't know