MONAZITE
monazite
(noun) a reddish-brown mineral containing rare earth metals; an important source of thorium and cerium
Source: WordNet® 3.1
Etymology
Noun
monazite (plural monazites)
(mineral) any of a range of reddish-brown minerals that are mixed phosphates of the lighter rare earth elements lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium and yttrium
Usage notes
The dominant element is denoted by a suffix, e.g. monazite-Ce.
Source: Wiktionary
Mon"a*zite, n. Etym: [From Gr. (Min.)
Definition: A mineral occurring usually in small isolated crystals, --
phosphate of the cerium metals.
Source: Webster’s Unabridged Dictionary 1913 Edition