ElementData is based on a wide range of sources, with enhancement at the Wolfram Research Companies by both human and algorithmic processing.

Among principal sources for ElementData are:

Atomic Mass Data Center. "NUBASE." 2003. »

Barbalace, K. "Periodic Table of Elements." 2007. »

Cardarelli, F. Materials Handbook: A Concise Desktop Reference. Springer, 2000.

Lide, D. R. (Ed.). CRC Handbook of Chemistry and Physics. 87th ed. CRC Press, 2006.

Speight, J. Lange's Handbook of Chemistry. McGraw-Hill, 2004.

United Kingdom National Physical Laboratory. "Kaye and Laby Tables of Physical and Chemical Constants." 2007. »

United States National Institute of Standards and Technology. "Atomic Weights and Isotopic Compositions Elements." 2005. »

United States National Institute of Standards and Technology. "NIST Chemistry Webbook." 2005. »

Winter, M. "WebElements." 2007. »

To report an error or suggest an addition to ElementData, contact the Wolfram Research ElementData team.