|Crystal class||Pedial (1) |
(same H-M symbol)
|Unit cell||a = 3.8 Å, b = 3.79 Å |
c = 35.74 Å; β = 90.18°; Z = 6
|Formula mass||441.89 g/mol|
|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.
- American Mineralogist data sheet PDF Accessed March 31, 2006.
|This article about a specific oxide mineral is a stub. You can help Wikipedia by expanding it.|