ChemGlobe: Hafnium - http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/72.html
Electronic, thermal, and steric data along with an isotope table. |
ChemicalElements.com: Hafnium - http://www.chemicalelements.com/elements/hf.html
Basic information, atomic structure, and isotopes. |
EnvironmentalChemistry.com: Hafnium - http://environmentalchemistry.com/yogi/periodic/Hf.html
Atomic structure, chemical and physical properties, and table of nuclides. |
It's Elemental: Hafnium - http://education.jlab.org/itselemental/ele072.html
Basic physical and historical information. |
LANL: Hafnium - http://periodic.lanl.gov/elements/72.html
History, properties, uses, and handling. |
Lenntech: Hafnium - http://www.lenntech.com/Periodic-chart-elements/Hf-en.htm
Physical data, chemical properties, health and environmental effects. |
Visual Elements: Hafnium - http://www.chemsoc.org/viselements/pages/hafnium.html
General and physical information, source, uses, key isotopes, and ionisation energies. |
WebElements: Hafnium - http://www.webelements.com/hafnium/
Extensive information on occurrence, compounds, and properties. |
Wikipedia: Hafnium - http://en.wikipedia.org/wiki/Hafnium
Properties of the element, including its history, applications, and characteristics. |