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bast·naes·iteor 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.]
(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]
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|Noun||1.||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