Difference between revisions of "Bastnasite"

Revision as of 23:01, May 3, 2010

Beware the Onion!

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-'''Bastnasite''' (sometimes spelled ''bastnaesite'') is one of the more common rare earth carbonate minerals.  It is an important ore for the production of [[cerium]], [[lanthanum]] and [[yttrium]].
+Beware the Onion!
-Although originally named for the first location it was found, Bastnas Mine, Riddarhyttan, Vastmanland, [[Sweden]], subsequent deposits have been located in [[Norway]], [[Malawi]], [[Mongolia]], [[Canada]] and [[California]].
-==Mineral Information==
-* Empirical Formula: Ce(CO<sub>3</sub>)F
-* Color is pale white, tan, gray, brown, yellow and pink.
-* Luster is pearly, vitreous, greasy to dull.
-* Transparency: Crystals are translucent to opaque.
-* Crystal System is hexagonal.
-* Cleavage is distinct in one direction (basal) and poor in three directions (prismatic).
-* Fracture is uneven.
-* Hardness is 4 to 4.5.
-* Specific Gravity is 4.7 to 5.0 (well above average) <ref>http://www.galleries.com/minerals/carbonat/bastnasi/bastnasi.htm</ref>
-==External Links==
-[http://webmineral.com/data/Bastnasite-(Ce).shtml Webmineral's Page on Bastnasite]
-==References==
-<small><references/></small>
-[[Category:Minerals]]