sillenite

== English == === Etymology === From Swedish Sillén +‎ -ite, named after the Swedish chemist Lars Gunnar Sillén. === Noun === sillenite (countable and uncountable, plural sillenites) (mineralogy) A cubic mineral with the chemical formula Bi12SiO20, typically found in association with bismuthite. === Further reading === David Barthelmy (1997–2026), “Sillenite”, in Webmineral Mineralogy Database.