Tags: Chemical Substance, Mineral.
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.