Niobium
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| en: Niobium – de: Niob – fr: Niobium – ja: ニオブ – ru: Ниобий – uk: Ніобій | |||
 symbol: Nb atomic number: 41 chemical series: transition metals |
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 Crystals |
 Niobium metal |
 Niobium bead with oxide layer |
