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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.]


(ˈbæstnəˌsaɪt) or


(Minerals) a rare yellow to reddish-brown mineral consisting of a carbonate of fluorine and several lanthanide metals. It occurs in association with zinc and is a source of the lanthanides. Formula: LaFCO3
[C19: from Swedish bastnäsit, after Bastnäs, Sweden, where it was found]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.bastnaesite - 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 ?
As a crucial strategic resource, it is mainly contained in bastnaesite, xenotime, monazite, and other minerals.
Fundamental geological aspects of the central Bastnaesite Zone offer distinct advantages for development over other rare earth projects.
Mineralogical work completed by the company indicated that a wide variety of rare-earth element-bearing minerals have been identified, including apatite, iimoriite, kainosite, gadolinite, allanite, bastnaesite, parisite, brannerite, thalenite, xenotime, fergusonite, synchysite (Y), and monazite.
The minerals identified included bastnaesite, yttrofluorite, yttrocerite, columbite, changbaiite, and kasolite.
The world famous gems minerals like Blue Spinel, Pink topaz, Peridot, Tourmaline, Chrome Tourmaline, Sphene, Aquamarine, Ruby, Emerald, rareearth minerals like bastnaesite and xenotim besides many varieties of quartz such as beta and faden Quartz are found in Pakistan and this God gifted mineral wealth could be explored through an effective marketing and exhibitions oversees for which role of commercial consulars, diplomats are of significant importance.
Scenarios under consideration include the production of intermediate products of a bastnaesite mineral concentrate (which as a result of the absence of radioactivity in Ngualla's mineralisation can be transported anywhere in the world); a mixed rare earth carbonate product (which may be sold or toll treated); commencing production at a smaller scale than the 10,000t per annum contained rare earth oxide (REO) base case, and subsequently increasing production through to 20,0000t REO per annum.
bastnaesite production base in Sichuan with bastnaesite of Mianning and Sichuan as their raw materials.
and leading expert in flotation of carbonate and fluorite-bearing bastnaesite ores, is consultant and manager of the Ashram Deposit's test work at UVR.
Drilling focused on the Bastnaesite Zone, mineralogically the most favourable area of the greater Ngualla deposit and identified for initial production.
s Mountain Pass rare earths mine in San Bernardino County got a temporary permit to mine bastnaesite ore for a three-month period starting in December 1999.
and Gansu Rare Earth New Material Limited-Liability Company, the medium and heavy RE production base built around the Southern China ionic mine represented by Guangzhou Pearl River Smelter and JAMR, and the bastnaesite production base built around the bastnaesite mine in Mianning, Sichuan.
3 tonne bulk sample of weathered Bastnaesite Zone mineralisation from Ngualla.