Niobium
chemist Heinrich Rose determined in 1846 that tantalum ores contain a second element, which he named niobium . In 1864 and 1865, a series of scientific findings clarified that niobium and columbium were the same element (as distinguished from tantalum), and for a century both names were used
Tantalum
additional elements in the tantalite sample, and he named them after the children of Tantalus : niobium (from Niobe , the goddess of tears), and pelopium (from Pelops ). [ 5 ] [ 6 ] The supposed element "pelopium" was later identified as a mixture of tantalum and niobium , and it was found
Dianium
Following the rediscovery of niobium in 1846 by the German chemist Heinrich Rose , Friedrich Wöhler , Heinrich Rose, R. Hermann and Kobell analysed the minerals tantalite and columbite to better understand the chemistry of niobium and tantalum. The similar reactivity of niobium and tantalum
Niobium(V) chloride
Hazards EU Index Not listed Flash point Non-flammable Related compounds Other anions Niobium (V) fluoride Niobium (V) bromide Niobium (V) iodide Other cations Vanadium(IV) chloride Tantalum(V) chloride Related niobium chlorides Niobium (III) chloride Niobium (IV
Pyrochlore
7 , spin glass systems Y 2 Mo 2 O 7 and superconducting materials Cd 2 Re 2 O 7 . [ edit ] Niobium mining The three largest producers of niobium ore are mining pyrochlore deposits. The largest deposit in Brazil is the CBMM mine located south of Araxá , Minas Gerais , followed by the
List of chemical elements naming controversies
Heinrich Rose discovered that tantalite contained a element similar to tantalum and named it Niobium . [ 5 ] [ 6 ] IUPAC officially adopted Niobium in 1950 after 100 years of controversy. [ 7 ] This was a compromise of sorts, the IUPAC accepted Tungsten instead of Wolfram (in deference
Pelopium
The differences between tantalum and niobium and the fact that no other similar element was present were unequivocally demonstrated in 1864 by Christian Wilhelm Blomstrand , [ 4 ] and Henri Etienne Sainte-Claire Deville , as well as Louis J. Troost , who determined the formulas of some of
Yttrium
In 1787, Carl Axel Arrhenius found a new mineral near Ytterby in Sweden and named it ytterbite , after the village. Johan Gadolin discovered yttrium's oxide in Arrhenius' sample in 1789, [ 3 ] and Anders Gustaf Ekeberg named the new oxide yttria . Elemental yttrium was first isolated in
Hafnium
power plants . Some superalloys used for special applications contain hafnium in combination with niobium , titanium , or tungsten . Contents 1 History 2 Characteristics 2.1 Isotopes 2.2 Chemistry 2.3 Occurrence 3 Production 4 Applications 4.1 Nuclear reactors
Anodizing
Other metals 3.1 Anodized titanium 3.2 Anodized magnesium 3.3 Anodized zinc 3.4 Anodized niobium 3.5 Anodized tantalum 4 Dyeing 5 Printing 6 Sealing 7 Environmental impact 8 Mechanical considerations 9 References 9.1 Bibliography 10 External links [ edit
