Monazite
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Monazite is a mineral and an ore of rare earth elements. Chemically, it is a mixture of phosphates of lanthanide elements and thorium.
Refining
Dissolving monazite with sodium hydroxide makes a slurry of metal oxides. Adding hydrochloric acid makes a solution of lanthanide chlorides and a residue containing thorium dioxide. The exact process can vary depending on specific properties of the mineral.[1]
References
- ↑ N.N. Greenwood & A. Earnshaw (1998). Chemistry of the Elements (2 ed.). Butterworth-Heinemann. p. 1230. ISBN 978-0-7506-3365-9.
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