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| | Transition Metals - Elements, Chemistry, Science 3
Metallurgy - Technology, Science 51
 ChemGlobe: NiobiumChemGlobe: Niobium
 Electronic, thermal, and steric data along with a table of isotopes.
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ChemicalElements.com: NiobiumChemicalElements.com: Niobium
 Basic information, atomic structure, and isotopes.
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EnvironmentalChemistry.com: NiobiumEnvironmentalChemistry.com: Niobium
 Atomic structure, chemical and physical properties, and table of nuclides.
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It's Elemental: NiobiumIt's Elemental: Niobium
 Basic physical and historical information.
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LANL: NiobiumLANL: Niobium
 History, sources, properties, and uses.
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Lenntech: NiobiumLenntech: Niobium
 Physical data, chemical properties, and health effects.
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USGS Minerals Information: NiobiumUSGS Minerals Information: Niobium
 Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).
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Visual Elements: NiobiumVisual Elements: Niobium
 Image, uses, general information, and ionisation energies.
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WebElements: NiobiumWebElements: Niobium
 Extensive information on history, uses, occurrence, compounds, and properties of the element.
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Wikipedia: NiobiumWikipedia: Niobium
 Properties of the element, including its history, applications, and characteristics.
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