The story
From Takeuchi + -ite; named in honor of Yoshio Takeuchi (1924–2009), Japanese mineralogist who predicted the existence of a compound with a structure found in this mineral.
Etymology from Wiktionary, CC BY-SA 4.0.
takeuchiite
Today it means: An orthorhombic-dipyramidal black mineral containing boron, magnesium, manganese, and oxygen. Full definition →