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1 item @ $125.00  

Mineralpedia Details for Yttrotantalite-(Y)

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Yttrotantalite-(Y)

Yttrotantalite-(Y)

Named in allusion to its yttrium content in the composition and its relation to tantalite. Occurring as a rare mineral in granitic pegmatites, Yttrotantalite can be found in Sweden, Norway, the USA, and Japan, among others. Yttrotantalite is radioactive and often found as metamict. Can be weakly magnetic.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/yttrotantalite-(Y).pdf

Formula
(Y,U,Fe2+)(Ta,Nb)2(O,OH)4 
Crystal System
Monoclinic 
Crystal Habit
Metamict, Prismatic 
Cleavage
Imperfect, None, None 
Luster
Sub Metallic 
Color
brownish black, yellowish brown, yellow 
Streak
colorless gray 
Class
Monoclinic - Prismatic 
Fracture
Conchoidal 
Hardness
5-5.5 
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Yttrotantalite-(Y) from Ytterby, Resaro, Vaxholm, Stockholm, Sweden

Yttrotantalite-(Y)
            from Ytterby, Resaro, Vaxholm, Stockholm, Sweden

Dark greenish black large crystal grains to 8mm.

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