Yttriaite-(Y): The natural occurrence of Y 2 O 3 from the Bol'shaya Pol'ya River, Subpolar Urals, Russia

Abstract

abStraCt Yttriaite-(Y), ideally Y 2 O 3 , is a new mineral (IMA2010-039) from the alluvial deposits of the Bol'shaya Pol'ya River, Subpolar Urals, Russia. The new mineral occurs as isolated crystals, typically cubo-octahedra <6 µm in size, embedded in massive native tungsten. Associated minerals include: copper, zircon, osmium, gold, and pyrite. The main forms observed are {100} and {111}. Due to the crystal size, physical properties could not be determined; however, the properties of syntheti