Four-place table of standard atomic weight values of hydrogen through uranium compared since 1961

Publication Date

2016-11-10

Time Period

2016-11-07

Coplen, T.B., Meyers, F., and Holden, N.E., 2016, Four-place table of standard atomic weight values of hydrogen through uranium compared since 1961: U.S. Geological Survey data release, http://dx.doi.org/10.5066/F7668B9R.

Type: Related Primary Publication

Forty years ago, the first Table of Atomic Weights to Four Significant Figures, based on 1975 values, was developed under guidance of the Commission on Atomic Weights of the International Union of Pure and Applied Chemistry (IUPAC) and published by the IUPAC Committee on Teaching of Chemistry (IUPAC Committee on Teaching Chemistry, 1975). In more recent years, similar tabulations were also published in the IUPAC scientific journal, Pure and Applied Chemistry, along with detailed biennial reviews of the Commission on Isotopic Abundances and Atomic Weights (Commission). The Commission recognized that the details and number of significant digits reported in the full Table of Standard Atomic Weights (for example, up to nine digits for aluminium (aluminum) or fluorine, or even ten digits for caesium (cesium)) exceeds the need and interests of many users. The abridged table was also published with the expectation that subsequent changes would be minimal. As a retrospective review of such changes, we determined the four-digit standard atomic weight values (either published or deduced) over time for elements from hydrogen through uranium since the seminal 1961 report by A. E. Cameron and E. Wichers (1962). This report was the first element-by-element review of all of the standard atomic weight values by the Commission, and it corresponded with changing the atomic mass standard from oxygen-16 to carbon-12.

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