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{%type%} Definitions

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n. - A dark mineral consisting of oxides of yttrium and erbium and tantalum and other minerals.

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Usage examples (5)
  • Fourth, about four litres of helium were prepared from fergusonite; and this gas was fractionally diffused during about three months, in the hope of obtaining heavier...
  • It is important to realize that the tantalum, niobium and zirconium production does not involve significant extra costs as they occur in the same mineral phases that contain...
  • By contrast, Dotson Ridge is characterized by steeply dipping pegmatitic and aplitic dikes variably mineralized with REE minerals including kainosite, xenotime, allanite,...
  • The minerals observed in these three showings are fergusonite, chevkinite, gadolinite, pyrochlore, zircon, monazite, allanite and ferrocolombite.
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