Definitions for "Tantalite"
A heavy mineral of an iron-black color and submetallic luster. It is essentially a tantalate of iron.
a mineral consisting of tantalum oxide of iron and manganese that occurs with niobite or in coarse granite; an ore of tantalum
niobium bearing mineral (Fe,Mn)(Nb,Ta)2O6 containing 2-40% Nb2O5, 42-84% Ta2O5, 0.5-3% TiO2, 10-20% Fe