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The Periodic Table of the Isotopes, published by International Union of Pure and Applied Chemistry (IUPAC), is now available from the Commission on Isotopic Abundances and Atomic Weights, which is a commission under the Inorganic Division (Division II) of IUPAC.

  

Purpose of the Commission
For several decades the Commission on Isotopic Abundances and Atomic Weights (CIAAW) has met biennially, at or prior to, the IUPAC General Assembly. CIAAW evaluates the scientific literature and publishes, at regular intervals, a Table of Standard Atomic Weights, a Table of Isotopic Composition of the Elements, and a Review of Atomic Weights of the Elements. As needed, abridged Tables of Standard Atomic Weights and recommendations on reporting of isotopic data are published.

In support of the IUPAC project “Development of an isotopic periodic table for the educational community”, CIAAW presents the IUPAC Periodic Table of the Isotopes in full resolution (3.4 MB).

Download the IUPAC Periodic Table of the Isotopes

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Links of Interest
Société Française des Isotopes Stables
SFIS

Recent CIAAW News

•The First Release of the new IUPAC Periodic Table of the Isotopes is now available. It is part of the IUPAC project titled “Development of an isotopic periodic table for the educational community”. 

• Atomic weights of 10 elements have changed. For the first time in history, the standard atomic weights of 10 elements (H, Li, B, C, N, O, Si, S, Cl, and Tl) are expressed as intervals, a method that more accurately reflects their variations in naturally occurring materials. These new values are found in the Table of Standard Atomic Weights 2009 (PDF), which also includes Tables abridged to four figures and five figures.

A companion article titled "Atomic Weights—No Longer Constants of Nature" is published in Chemistry International.

• "Atomic weights of 10 elements on periodic table about to make an historic change" by University of Calgary

• "Atomic Weights of Ten Chemical Elements About to Change" by USGS

• The Commission's Table of Isotopic Compositions of the Elements (PDF) has been published. For each element, this critical evaluation of the published literature provides the "best measurement" of the isotope abundances in a single sample and a set of representative isotope abundances and uncertainties that accommodate known variations in normal terrestrial materials.

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2010 Commission on Isotopic Abundances and Atomic Weights | a commission of the International Union of Pure and Applied Chemistry