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Yttrobetafite-(Y): (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH)
Comments: Fragment of the large grain of compact mustard-yellow yttrobetafite-(Y) from the type locality. Associated minerals are black biotite and redish-brown veinlets of gummite. Location: Alakurtti pegmatite, Northern Karelia, Murmanskaja Oblast', Northern Region, Russia. Scale: Specimen size is 4.5x2.8x1.4 cm. © Pavel M. Kartashov