Hafnium

See also:

• Science: Chemistry: Elements: Transition Metals  (3)

• ChemGlobe: Hafnium - Electronic, thermal, and steric data along with an isotope table.
• ChemicalElements.com: Hafnium - Basic information, atomic structure, and isotopes.
• EnvironmentalChemistry.com: Hafnium - Atomic structure, chemical and physical properties, and table of nuclides.
• It's Elemental: Hafnium - Basic physical and historical information.
• LANL: Hafnium - History, properties, uses, and handling.
• Lenntech: Hafnium - Physical data, chemical properties, health and environmental effects.
• Visual Elements: Hafnium - General and physical information, source, uses, key isotopes, and ionisation energies.
• Wikipedia: Hafnium - Properties of the element, including its history, applications, and characteristics.