Wodginite

WODGINITE (after the place of the finding, namely, the Wodgina deposit, Western Australia * EN: wodginite; DE: Wodginite; FR: wodginite; ES: vodginita; RU: воджинит) is the mineral of the family of the titanium tantalum niobates, Mn(Sn,Ta,Ti,Fe)(Ta,Nb)2O8. Wodginite contains up to 74% of Ta2O5, and 9-13% of SnO2. Wodginite crystallizes into the monoclinic crystal system. The crystal structure is sub-laminate. Wodginite forms the prismatic, acicular, or flattened crystals, phenocrysts and aggregates of the small irregular grains. The colour is from red-brown to black. Wodginite is opaque, but sometimes is translucent within the thin chips. Wodginite is brittle. The hardness is 5.5-6. The density is 7500 ± 300 kilograms per cubic metre. Wodginite may be encountered only within the greisenized places of the lithium pegmatites (mainly of the petalite type). Wodginite may be replaced with microlite. Being the rare mineral, wodginite is nevertheless the important tantalum ore (for example, the Bernic Lake deposit). During the gravitational beneficiation, wodginite, along with other minerals of tantalum, accumulates within the collective concentrate, which is subjected to the roasting at the temperature of 1000 degrees Celsius for the increasing of the extraction of tantalum into the potassium fluorotantalate compound.