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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

Yukonite

Named for Yukon Territory, the territory in Canada from which it was first found, Yukonite is a secondary mineral that is typically altered from arseopyrite. Found in few localities worldwide, including Canada, USA in New Jersey and Colorado, Germany, and Poland. When fresh, Yukonite may decrepitate, or crackle when exposed to air, water, or heat. This process causes the evolution of carbon dioxide.

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

Yuksporite

Named after its discovery locality near Mt. Yukspor in the Kola Peninsula, Russia.  Found only in Russian alkali massifs, Yuksporite occurs in nepheline syenite veins. Yuksporite is one of the only two members of the Umbite Group.

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

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