MONAZITE

mŏnˈəzīt, yellow to reddish-brown natural phosphate of the rare earths, mainly the cerium and lanthanum metals, usually with some thorium. Yttrium, calcium, iron, and silica are frequently present. Monazite sand is the crude natural material and is usually purified from other minerals before entering commerce. Monazite occurs in North Carolina, South Carolina, Idaho, Colorado, Montana, and Florida in the United States, and in Brazil, India, Australia, and South Africa. It is an important source of cerium, thorium, and other rare-earth metals and compounds.

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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Questia Books and Articles on: Monazite
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books on: Monazite  - 106 results

       More book Results: 1-10 11-20 21-30 31-40 41-50 >>  
 
...Ore. XIII. Fullers Earth. XlV. Mica. XV. Gold. XVI. Strategic Minerals:--Beryl--Monazite--Zircon. XVII. Other Minerals:--Titanium -- Magnesite -- Steatite -- Vanadium --Silica...
...are substantial but badly scattered. Promising ilmenite and monazite sands are as yet unutilized. The only minerals of commercial...graphite, and new market studies should be made of thorianite, monazite and flaked or ground mica. Other mineral developments may...
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journal articles on: Monazite  - 2 results

 
 
...committed Brazil to supply the United States over a three-year period with 3,000-5,000 tons of monazite, a mineral containing uranium. There was a second monazite agreement signed in 1952 and in late 1956 Brazilian scientists achieved the first nuclear...
...discovered turned out to have a uranium content of less than one-tenth of one percent. In early 1945, plans were made to ship monazite (which contains thorium) from China to Japan, but the Chinese deposits were in areas where the anti-Japanese resistance...


 

magazine articles on: Monazite  - 2 results

 
 
...subsidiaries, pan-Indian capitalists, and the central government. The state has the largest and best deposit of monazite in the country. But monazite processing is an exclusive monopoly of the government of India. Because of this, the central governmental...
...radioactive hotspots back down on terra firma. For example, areas of Brazil, India and China, rich in a rare earth mineral called monazite -- which contains thorium, uranium and radium -- can have background radiation levels hundreds or even thousands of times higher...


 

newspaper articles on: Monazite  - 1 result

 
 
...predecessor, entered into a contract with the Atomic Energy Commission to extract thorium and rare earths from naturally occurring monazite sands. In 1956, the Atomic Energy Commission contract and Rare Earths license to possess, transfer and use radioactive thorium...


 

encyclopedia articles on: Monazite  - 16 results

       More encyclopedia Results: 1-10 11-16 >>  
 
MONAZITE mon zit, yellow to reddish-brown natural phosphate...Yttrium, calcium, iron, and silica are frequently present. Monazite sand is the crude natural material and is usually purified from other minerals before entering commerce. Monazite occurs in North Carolina, South Carolina, Idaho, Colorado...
...a district administrative center, with industries in motor repair, rubber goods, and rice- and cotton-milling. Ilmenite and monazite are mined. It is an important Christian center in the primarily Hindu country of India. ____________________ Copyright 2009...
...above 150 degrees Celsius. Samarium is found widely distributed in nature; it is obtained commercially from the minerals monazite and bastnasite. Naturally occurring samarium is a mixture of seven isotopes, three of which are radioactive with extremely...
...ytterbia, Yb 2 O 3 ) is colorless. It is widely distributed in a number of minerals, e.g., gadolinite, and is recovered from monazite but has no commercial uses. Its discovery is credited to J. C. G. de Marignac, who in 1878 separated a substance he called...
...moist air or when heated. Holmia, the oxide, is found in nature, with other rare earths , in the minerals gadolinite and monazite. Holmium, its oxide, and its salts have no commercial uses. The metal was discovered spectroscopically in 1878 by the Swiss...
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