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Open Directory - Science: Chemistry: Elements: Niobium
Science: Chemistry: Elements: Transition Metals
Science: Technology: Metallurgy
- Basic information, atomic structure, and isotopes.
- Atomic structure, chemical and physical properties, and table of nuclides.
It's Elemental: Niobium
- Basic physical and historical information.
- 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).
- Extensive information on history, uses, occurrence, compounds, and properties of the element.
- Properties of the element, including its history, applications, and characteristics.
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