ChemGlobe: Lutetium
- Electronic, thermal, and steric data along with an isotope table.
- http://partisans.spurious.biz/~pkremer/projects/chemglobe/ptoe/_/71.html
LANL: Lutetium
- Basic information and history.
- http://periodic.lanl.gov/elements/71.html
Wikipedia: Lutetium
- Properties of the element, including its history, applications, and characteristics.
- http://en.wikipedia.org/wiki/Lutetium
Lenntech: Lutetium
- Physical data, chemical properties, health and environmental effects.
- http://www.lenntech.com/Periodic-chart-elements/Lu-en.htm
EnvironmentalChemistry.com: Lutetium
- Atomic structure, chemical and physical properties, and table of nuclides.
- http://environmentalchemistry.com/yogi/periodic/Lu.html