Atomic weights of the elements 2011 (IUPAC Technical Report)

Wieser, Michael E.; Holden, Norman; Coplen, Tyler B.; Böhlke, John K.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Loss, Robert D.; Meija, Juris; Hirata, Takafumi; Prohaska, Thomas; Schoenberg, Ronny; O’Connor, Glenda; Walczyk, Thomas; Yoneda, Shige; Zhu, Xiang‑Kun

doi:10.1351/PAC-REP-13-03-02

Pure Appl. Chem., 2013, Vol. 85, No. 5, pp. 1047-1078

http://dx.doi.org/10.1351/PAC-REP-13-03-02

Published online 2013-04-29

INORGANIC CHEMISTRY DIVISION

Atomic weights of the elements 2011 (IUPAC Technical Report)

Michael E. Wieser¹*, Norman Holden², Tyler B. Coplen³, John K. Böhlke³, Michael Berglund⁴, Willi A. Brand⁵, Paul De Bièvre⁶, Manfred Gröning⁷, Robert D. Loss⁸, Juris Meija⁹, Takafumi Hirata¹⁰, Thomas Prohaska¹¹, Ronny Schoenberg¹², Glenda O’Connor¹³, Thomas Walczyk¹⁴, Shige Yoneda¹⁵ and Xiang‑Kun Zhu¹⁶

¹ Department of Physics and Astronomy, University of Calgary, Calgary, Canada
² Brookhaven National Laboratory, Upton, NY, USA
³ U.S. Geological Survey, Reston, VA, USA
⁴ Institute for Reference Materials and Measurements, Geel, Belgium
⁵ Max Planck Institute for Biogeochemistry, Jena, Germany
⁶ Independent Consultant on MiC, Belgium
⁷ International Atomic Energy Agency, Seibersdorf, Austria
⁸ Department of Applied Physics, Curtin University of Technology, Perth, Australia
⁹ National Research Council of Canada, Ottawa, Canada
¹⁰ Kyoto University, Kyoto, Japan
¹¹ Department of Chemistry, University of Natural Resources and Applied Life Sciences, Vienna, Austria
¹² Institute for Geosciences, University of Tübingen, Tübingen, Germany
¹³ New Brunswick Laboratory, Argonne, IL, USA
¹⁴ Department of Chemistry (Science) and Department of Biochemistry (Medicine), National University of Singapore (NUS), Singapore
¹⁵ National Museum of Nature and Science, Tokyo, Japan
¹⁶ Chinese Academy of Geological Sciences, Beijing, China

Abstract: The biennial review of atomic-weight determinations and other cognate data has resulted in changes for the standard atomic weights of five elements. The atomic weight of bromine has changed from 79.904(1) to the interval [79.901, 79.907], germanium from 72.63(1) to 72.630(8), indium from 114.818(3) to 114.818(1), magnesium from 24.3050(6) to the interval [24.304, 24.307], and mercury from 200.59(2) to 200.592(3). For bromine and magnesium, assignment of intervals for the new standard atomic weights reflects the common occurrence of variations in the atomic weights of those elements in normal terrestrial materials.