Sites:
| 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. | | Niobium: Data tables and historic information. | | 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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Classical
