Gadolinium
Links
Visual Elements: Gadolinium
http://www.chemsoc.org/viselements/pages/gadolinium.html
Image, source, uses, physical information, and key isotopes.
Corrosionsource.com: Gadolinium
http://www.corrosionsource.com/handbook/periodic/64.htm
History, occurrence, properties, isotopes, and uses.
It's Elemental: Gadolinium
http://education.jlab.org/itselemental/ele064.html
Basic physical and historical information.
ChemicalElements.com: Gadolinium
http://www.chemicalelements.com/elements/gd.html
Basic information, atomic structure, and isotopes.
Gadolinium
http://www.scescape.net/~woods/elements/gadolinium.html
Data tables and historic information.
EnvironmentalChemistry.com: Gadolinium
http://environmentalchemistry.com/yogi/periodic/Gd.html
Atomic structure, chemical and physical properties, and table of nuclides.
WebElements: Gadolinium
http://www.webelements.com/webelements/elements/text/Gd/key.html
Extensive information on history, uses, occurrence, compounds, and properties.
Lenntech: Gadolinium
http://www.lenntech.com/Periodic-chart-elements/Gd-en.htm
Physical data, chemical properties, health and environmental effects.