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Niobium is a
chemical element; it has
symbol Nb (formerly
columbium, Cb) and
atomic number 41. It is a
light grey, crystalline, and
ductile transition...
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mineral in
coltan is
columbite (after niobium's
original American name
columbium), and the tantalum-dominant
mineral is tantalite.
Tantalum from coltan...
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chemist who
discovered the
element niobium, for
which he
proposed the name "
columbium".
Hatchett was
elected a
Fellow of the
Linnaean Society in 1795, and of...
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Hatchett had
discovered columbium (now niobium). In 1809, the
English chemist William Hyde
Wollaston compared the
oxides of
columbium and tantalum, columbite...
- The
element niobium was
first called columbium, a name
which some
people still use today. The name
columbium,
coined by the
chemist Charles Hatchett...
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Niobium oxide,
archaically called columbium oxide, may
refer to:
Niobium monoxide (niobium(II) oxide), NbO
Niobium dioxide (niobium(IV) oxide), NbO2 Niobium...
- A
niobium electrolytic capacitor (historically also
Columbium capacitor) is an
electrolytic capacitor whose anode (+) is made of p****ivated
niobium metal...
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Galissard de Marignac, and
Heinrich Rose
found only
tantalum and
niobium (
columbium) in it. The
exact number of rare-earth
elements that
existed was highly...
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Niobium monoxide is the
inorganic compound with the
formula NbO. It is a grey
solid with
metallic conductivity. NbO
adopts an
unusual cubic structure,...
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Charles Hatchett named element 41
columbium in 1801 (Cb), but
after the
publication of On the
Identity of
Columbium and
Tantalum by
William Hyde Wollaston...
