the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > oxides of titanium, tantalum, nickel, or rare earths > fergusonite (4)
‘A metaniobate (and tantalate) of yttrium with erbium, cerium, uranium, iron, calcium, etc.’ (Dana).
A yellow-brown form of fergusonite, formerly regarded as a distinct variety.
A variety of, or mineral allied to, fergusonite, n.
A variety of fergusonite found in Norway and Sweden.