guilleminite

== English == === Etymology === Named for Jean-Claude Guillemin (1923–1994), founder of the Service Géologique National of the Bureau de Recherches Géologiques et Minières: Guillemin +‎ -ite. === Noun === guilleminite (mineralogy) An orthorhombic-pyramidal mineral containing barium, hydrogen, oxygen, selenium, and uranium. === References === David Barthelmy (1997–2026), “Guilleminite”, in Webmineral Mineralogy Database. === Further reading === guilleminite on Wikipedia.Wikipedia