Statistics and information on the worldwide supply, demand, and flow of the element (PDF format).

Full text of the monograph by J. Pijck (Laboratory for Analytical Chemistry, University of Ghent, Ghent, Belgium).

Properties of the element, including its history, applications, and charateristics.

Electronic, thermal, and steric data along with an isotopes table.

Data tables and historic information.

Atomic structure, chemical and physical properties, and table of nuclides.