fergusonite
Noun
Meaning
A mineral of a brownish black color, essentially a tantalo-niobate of yttrium, erbium, and cerium; -- so called after Robert Ferguson.
Source: Webster's dictionarySynonyms
thorite
columbite
gadolinite
uraninite
niobite
sphalerite
allanite
cerite
euxenite
pyrochlore
lanthanite
orthite
bastnasite
hollandite
lorenzenite
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