Tantite

tantite

stibiotantalite

wodginite

holtite

Images

Formula: Ta₂O₅
Simple oxide of tantalum
Crystal system: Triclinic
Specific gravity: 8.45 calculated
Hardness: 7
Streak: White
Colour: Colourless
Luminescence: No fluorescence under UV, weak blue cathodoluminescence
Common impurities: Nb
Environments

Pegmatites

Localities

At the type locality, Vasin-Myl'k Mt, Voron'i Tundry, Murmansk Oblast, Russia, tantite forms veinlets 0.5 mm long and 0.02 mm wide, and 0.04 to 0.05 mm lenticular segregations, as well as interstitial material in microlite crystal aggregates, in granitic pegmatites of the Kola peninsula. Associated minerals include stibiotantalite and holtite (AM 69.1193).
Tantite from Vasin-Myl'k Mt - Image

At the Animikie Red Ace pegmatite, Pine River pegmatites, Fern, Florence County, Wisconsin, USA, tantite occurs in the highly fractionated pegmatite associated with tantalite-(Mn), wodginite and elbaite (HOM).

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