monazite

monazite (mŏnˈəzĪt) [key], 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.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

More on monazite from Fact Monster:

  • Nagercoil - Nagercoil Nagercoil , city (1991 pop. 190,084), Tamil Nadu state, S India. Nagercoil is the ...
  • rare earths - rare earths rare earths, in chemistry, oxides of the rare-earth metals. They were once thought to ...
  • lutetium - lutetium lutetium, formerly lutecium, metallic chemical element; symbol Lu; atomic number 71; at. ...
  • holmium - holmium holmium [Lat.,=Stockholm], metallic chemical element; symbol Ho; at. no. 67; at. wt. ...
  • terbium - terbium terbium [from Ytterby, a village in Sweden], metallic chemical element; symbol Tb; at. no. ...

See more Encyclopedia articles on: Mineralogy and Crystallography