from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A reddish-brown phosphate mineral containing rare-earth metals, (Ce, La, Y, Th)PO4, important as a source of cerium and thorium.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. 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
from the GNU version of the Collaborative International Dictionary of English
- n. A mineral occurring usually in small isolated crystals, -- a phosphate of the cerium metals.
from The Century Dictionary and Cyclopedia
- n. A phosphate of the cerium metals, usually containing some thorium silicate.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a reddish-brown mineral containing rare earth metals; an important source of thorium and cerium
Some of the country's beach sands contain monazite that yield thorium, which find application in fuels for nuclear reactors.
It is mined with the shovel and pick, the soil and underlying gravel containing the monazite being thrown upon a perforated iron pan at the head of a sluice box, and as this is washed down by a current of water the monazite, which is nearly twice as heavy as ordinary sand, quickly settles to the bottom and is easily separated from the latter.
Here also is found monazite, which is mined to some extent.
At the Kulyk Lake showing, a series of red secondary fracture fillings has returned historical values up to 0.22 per cent U3O8 and 1.28 per cent Th. No historical analyses for REE's have been reported, but petrographic work indicated the presence of important REE carrier minerals such as monazite and the heavy rare earth element
The main source of titanium in the country are beach sands that contain monazite and ilmenite.
And there are plenty of studies which show no correlation between low doses from natural causes (both from high-altitude, such as residents of Denver, as well as people living in radiation-rich soil regions, such as the monazite sands in India).
Other beach sands containing monazite yield titanium, a strong and light futuristic metal, and its mining is under the control of the mines ministry.
India produced 122 metric tons of monazite in 2005, according to the last available data with the mines ministry.
In the 1950s and 1960s most rare-earth mining occurred in South Africa, India and Brazil where the elements were primarily extracted from the mineral monazite (see chart).
It is also found in phosphate rock, lignite, monazite sands, and can be recovered commercially from these sources.