Wiktionary
hutchinsonite
n. (context mineral English) A rare sulfosalt mineral of thallium, arsenic and lead.
Wikipedia
Hutchinsonite
Hutchinsonite is a sulfosalt mineral of thallium, arsenic and lead with formula (Tl,Pb)AsS. Hutchinsonite is a rare hydrothermal mineral.
It was first discovered in Binnental, Switzerland in 1904 and named after Cambridge mineralogist Arthur Hutchinson, F.R.S. (1866–1937).