Wodginite

minerals

tantalite

cassiterite

Formula: Mn2+Sn4+Ta2O8
Multiple oxide containing tantalum, manganese-bearing mineral, wodginite group
Specific gravity: 7.36
Hardness: 5½
Streak: Brown
Colour: Red-brown, dark brown to black
Environments

Pegmatites

Wodginite is widely distributed in complex zoned tantalum-bearing pegmatites in amphibolite (Mindat, Dana).

Localities

One of two co-type localities is the Wodgina Tantalite Mine, Wodgina, Abydos Station, Port Hedland Shire, Western Australia. Here wodginite occurs in a matrix of albite, quartz and muscovite, associated with tantalite (AM 48.1417, Dana, HOM).

The second of the two type localities is the Tanco Mine, Bernic Lake, Lac-du-Bonnet area, Manitoba, Canada, where wodginite occurs as the chief ore mineral in a major tantalum ore body in a complex zoned pegmatite in amphibolite. Associated minerals include microcline, albite, lepidolite, microlite, tantalite, cassiterite and tapiolite (Dana, HOM). The wodginite occurs as small, black grains up to about ten millimeters in diameter, containing inclusions of feldspar and/or mica. Additional minerals found in the pegmatite include quartz, lithium micas, spodumene, pollucite, amblygonite, beryl, lithiophilite, apatite, tourmaline, rhodochrosite and tantalite (AM 48.1417).

At the Jabuti claim, São Geraldo do Baixio, Minas Gerais, Brazil, wodginite occurs in large brilliant crystals sometimes epitaxially intergrown with cassiterite (Dana).

At the Emmons Quarry, Uncle Tom Mountain, Greenwood, Oxford County, Maine, USA, the pegmatite is a highly evolved boron-lithium-cesium-tantalum enriched pegmatite. Wodginite has been found only as rims on tantalowodginite (R&M 94.6.517).

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