hausmannite

== English == === Etymology === From Hausmann +‎ -ite, named for J. F. L. Hausmann, German mineralogist. === Noun === hausmannite (countable and uncountable, plural hausmannites) (mineralogy) A dark mineral composed of manganese tetroxide, sometimes used as an ore of manganese. ==== Derived terms ==== hydrohausmannite === Further reading === David Barthelmy (1997–2026), “Hausmannite”, in Webmineral Mineralogy Database. “hausmannite”, in Mindat.org, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026.