tranquillityite

English

Etymology

From tranquillity +‎ -ite, after the Sea of Tranquillity, a basin on the Moon where the mineral was first found.

Noun

tranquillityite (plural tranquillityites)

1. (mineralogy) A hexagonal dark red mineral containing iron, oxygen, silicon, titanium, yttrium, and zirconium.

References

• David Barthelmy (1997–2025) “Tranquillityite”, in Webmineral Mineralogy Database.