kalkowskite
noun
kal·kow·skite
kalˈkȯfˌskīt
plural -s
: a mineral Fe2Ti3O9(?) consisting of an oxide of iron and titanium and usually containing small amounts of rare-earth elements, niobium, and tantalum
Word History
Etymology
German kalkowskyn (irregular from E. L. Kalkowsky †1938 German mineralogist + German -in -ine) + English -ite