Also found in: Thesaurus, Encyclopedia, Wikipedia.


A reddish-brown phosphate mineral containing several rare-earth elements, (Ce, La, Nd, Y, Th)PO4, important as a source of cerium and thorium.

[Greek monazein, to live alone; see monastery + -ite.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Minerals) a yellow to reddish-brown mineral consisting of a phosphate of thorium, cerium, and lanthanum in monoclinic crystalline form
[C19: from German, from Greek monazein to live alone, so called because of its rarity]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈmɒn əˌzaɪt)

a reddish brown mineral, a phosphate of cerium, lanthanum, and thorium, (Ce, La, Th)PO4: the principal ore of thorium.
[< German Monazit (1829)]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.monazite - a reddish-brown mineral containing rare earth metals; an important source of thorium and cerium
atomic number 58, Ce, cerium - a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group
atomic number 63, Eu, europium - a bivalent and trivalent metallic element of the rare earth group
atomic number 60, Nd, neodymium - a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium
atomic number 59, Pr, praseodymium - a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process
atomic number 62, samarium, Sm - a grey lustrous metallic element of the rare earth group; is used in special alloys; occurs in monazite and bastnasite
atomic number 65, Tb, terbium - a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite
atomic number 90, thorium, Th - a soft silvery-white tetravalent radioactive metallic element; isotope 232 is used as a power source in nuclear reactors; occurs in thorite and in monazite sands
atomic number 69, thulium, Tm - a soft silvery metallic element of the rare earth group; isotope 170 emits X-rays and is used in small portable X-ray machines; it occurs in monazite and apatite and xenotime
atomic number 70, Yb, ytterbium - a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
All the REEs are 100% hosted in coarse-grained monazite, however the LREO:HREO ratio for IV-19-014 between 24.0 to 25.05 m, in particular, suggests another REE mineral host, and based on the 2018 heavy mineral sand study which identified a significant concentration of xenotime within the sands, Appia believes this interval reflects monazite with xenotime mineralization.
But now it's been found to also have monazite ore which contains extremely high grade rare earth minerals including neodymium and praseodymium -- elements vital to cutting-edge industries.
The proposed beneficiation and hydro metallurgy processing plant will treat rare earths deposits, predominantly monazite, hosting high neodymium and praseodymium contents to produce a mixed rare earths carbonate that will be further refined into individual rare earth oxides at processing plants overseas.
Named after its color, black sand contains a percentage of essential minerals: ilmenite, zircon, magnetite, rutile, garnet, as well as monazite, which contains radioactive minerals.
Medallion Resources Ltd (CVE:MDL) (OTCMKTS:MLLOF) is raising money to advance work on its monazite processing operations to produce rare earth magnet metals in North America.
These are mainly aluminium, rutile, zircon, monazite, granite, and magnetite.
Taiwan's rare earth mineral, called 'monazite,' contains more than 50 percent of rare-earth elements, according to Business Weekly.
Optical microscopy detected many other minerals among the heavy minerals of the Lemme samples, the contents of which remained near the detection limit of the XRD method (pyroxenes, epidotes, micas, tourmaline and apatite) or considerably lower (pyrite, barite, staurolite, kyanite, monazite and titanite).
The Kollam coastline is rich in minerals like ilmenite, rutile, zircon, monazite, leucoxene, sillimanite and garnet.
Among these elements of economic interest are elements of rare earths and they are pointed out that the coastal sediments characterized by a high concentration of black sands, are highlighted by the presence of minerals of economic value, such as ilmenite, rutile, monazite and magnetite (Dawood, 2007).
Whereas the rock fragments are well rounded, the heavy minerals include garnet, tourmaline, rutile, monazite, glauconite and biotite mica.