| 21. | Zirconium and niobium alloys used in the nuclear industry are routinely VAR processed.
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| 22. | The NbO 2 is subsequently reacted with magnesium vapour to produce niobium metal.
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| 23. | The characteristics of niobium electrolytic capacitors and tantalum electrolytic capacitors are roughly comparable.
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| 24. | For niobium this behavior was known since the beginning of the 20th century.
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| 25. | However, solid polymer niobium electrolytic capacitors do have a life time specification.
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| 26. | Niobium is for Niobe, Tantalus'daughter.
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| 27. | The coin has a silver ring and gold-brown niobium " pill ".
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| 28. | It was not until the early 20th century that niobium was first used commercially.
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| 29. | Ferroniobium contains between 60 and 70 % niobium.
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| 30. | Granitic rocks and also in carbonatite intrusions where it may also contain anomalous niobium.
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