Lutetium
Links
Visual Elements: Lutetium
http://www.chemsoc.org/viselements/pages/lutetium.html
Image, physical information, and key isotopes.
ChemicalElements.com: Lutetium
http://www.chemicalelements.com/elements/lu.html
Basic information, atomic structure, and table of isotopes.
It's Elemental: Lutetium
http://education.jlab.org/itselemental/ele071.html
Basic physical and historical information.
Lutetium
http://www.scescape.net/~woods/elements/lutetium.html
Data tables and historic information.
EnvironmentalChemistry.com: Lutetium
http://environmentalchemistry.com/yogi/periodic/Lu.html
Atomic structure, chemical and physical properties, and table of nuclides.
WebElements: Lutetium
http://www.webelements.com/webelements/elements/text/Lu/key.html
Extensive information on history, uses, occurrence, compounds, and properties.
Lenntech: Lutetium
http://www.lenntech.com/Periodic-chart-elements/Lu-en.htm
Physical data, chemical properties, health and environmental effects.