elpidite

== English == === Etymology === From Ancient Greek ἐλπίς (elpís, “hope”) + -ite. === Noun === elpidite (usually uncountable, plural elpidites) (mineralogy) An orthorhombic-pyramidal mineral containing hydrogen, oxygen, silicon, sodium, and zirconium. ==== References ==== David Barthelmy (1997–2026), “Elpidite”, in Webmineral Mineralogy Database.