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or bast·näs·ite also bast·nas·ite  (băst′nə-sīt′)
A yellowish to reddish-brown mineral, (Ce,La, Y)CO3F, that is a source of several rare-earth elements including gadolinium, samarium, and neodymium.

[After Bastnäs, a mine in south-central Sweden.]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.bastnasite - a yellow-to-brown mineral that is a source of rare earth elements
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 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
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
References in periodicals archive ?
There are many mineral sources from where REE could be extracted but mostly from two main types-Monazite and Bastnasite.
Rare earth carbonate minerals synchysite and bastnasite have been observed in samples of fresh, unweathered carbonatite beneath this weathered profile.
Neodymium is never found in nature as the free element; rather, it occurs in ores such as monazite and bastnasite that contain small amounts of all the rare earth metals.
In the Mineral Sector 85% area of FATA had been geologically explored where prospects for a number of precious minerals including oil, gas, gold, copper, manganese, chromites, granite, Bentonite, gypsum and Bastnasite had been positive and promising.
The largest percentage of worldwide rare earth economic resources correspond to Bastnasite deposits in China and the U.
The Ambatofinandrahana region is most famous for quartz with and without inclusions, epitactic hematite on rutile, bastnasite, tourmaline and beryl, including huge crystals of aquamarine, with dumortierite crystals, encased in solid pegmatite.
04 ppb), however we suspect that higher levels of Ce found in our seawater samples from coastal CA relates to the anthropogenic influence of mining of Ce-rich minerals like bastnasite and monazite for use in the petroleum industry (Olmez et al.
However, in bastnasite and monazite -- minerals that serve as the two major commercial rare-earth sources -- the relative ratios of rare-earth metals are dramatically skewed from that otherwise constant pattern, which geochemists call the "crustal abundance.
Molycorp Minerals, LLC announced today that its Board of Directors has approved an exploration program to be carried out in 2010 and 2011, for the purpose of better delineating the existence and extent of various Bastnasite, Monazite and other Rare Earth bearing mineral deposits known to exist outside the current mining area on the Company's property and claims at Mountain Pass, California.
Results from an initial five RC samples studied identify bastnasite as the main rare earth mineral present.
It is one of 15 Lanthanide elements contained in the mineral bastnasite at the Mountain Pass mine.