Tantalaeschynite-(Y)

minerals

titanium

columbite

aeschynite

Formula: Y(Ta,Ti,Nb)2O6
Multiple oxide containing niobium, tantalum or titanium, aeschynite group
Specific gravity: 5.7 to 6.1
Hardness: 5½ to 6
Streak: Black, light yellowish brown
Colour: Brownish black
RADIOACTIVE
Environments

Pegmatites

At the type locality, the Raposa pegmatite, São José do Sabugi, Borborema mineral province, Paraíba, Brazil, tantalaeschynite occurs in a pegmatite associated with quartz, microcline, biotite, columbite and beryl (AM 59.1331-1332, HOM).

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