ishikawaite
noun
ishi·ka·wa·ite
ˌishēˈkäwəˌīt
plural -s
: a rare mineral (U, Fe, Y, etc.)(Nb, Ta)O4 consisting of an oxide of uranium, iron, niobium, tantalum, yttrium, and the rare-earth metals
Word History
Etymology
Ishikawa district, north central Honshu, Japan, its locality + English -ite