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See also:

» ChemGlobe: Niobium - Electronic, thermal, and steric data along with a table of isotopes.

» ChemicalElements.com: Niobium - Basic information, atomic structure, and isotopes.

» EnvironmentalChemistry.com: Niobium - Atomic structure, chemical and physical properties, and table of nuclides.

» It's Elemental: Niobium - Basic physical and historical information.

» LANL: Niobium - History, sources, properties, and uses.

» Lenntech: Niobium - Physical data, chemical properties, and health effects.

» USGS Minerals Information: Niobium - Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).

» Visual Elements: Niobium - Image, uses, general information, and ionisation energies.

» WebElements: Niobium - Extensive information on history, uses, occurrence, compounds, and properties of the element.

» Wikipedia: Niobium - Properties of the element, including its history, applications, and characteristics.

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