samarskite

noun

sa·​mar·​skite sə-ˈmär-ˌskīt 

ˈsa-mər-

: a black or brownish-black orthorhombic mineral that is a complex oxide of rare earths, uranium, iron, lead, thorium, niobium, tantalum, titanium, and tin

Word History

Etymology

German Samarskit, from V. E. Samarskiĭ-Bykhovets †1870 Russian mining engineer

First Known Use

1849, in the meaning defined above