|Unit cell||a = 3.8 Å, b = 3.79 Å, c = 35.74 Å; β = 90.18°; Z = 6|
|Formula mass||441.89 g|
|Crystal system||Triclinic - Pedial|
|Mohs scale hardness||7|
Tantite is a rare tantalum oxide mineral with formula: Ta2O5. Tantite forms transparent microscopic colorless triclinic - pedial crystals with an adamantine luster. It has a Mohs hardness of 7 and a high specific gravity of 8.45. Chemical analyses show minor inclusion (1.3%) of niobium oxide.
It was first described in 1983 for an occurrence in a pegmatite in the Kola peninsula, Russia. It has also been reported from a pegmatite complex in Florence County, Wisconsin. Associated mineral species include elbaite, lepidolite, spodumene, columbite-tantalite, wodginite, and microlite.
- Wisconsin minerals Accessed March 31, 2006.[dead link]
- American Mineralogist data sheet PDF Accessed March 31, 2006.
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