Standard atomic weights of the elements 2021 (IUPAC Technical Report)-Reference-Cited by-同舟云学术

Standard atomic weights of the elements 2021 (IUPAC Technical Report)

Published:2022-05-01 Issue:5 Volume:94 Page:573-600
ISSN:0033-4545
Container-title:Pure and Applied Chemistry
language:en
Short-container-title:

Author:

Prohaska Thomas¹²,Irrgeher Johanna¹³⁴⁵,Benefield Jacqueline⁶,Böhlke John K.⁶,Chesson Lesley A.⁷,Coplen Tyler B.⁶,Ding Tiping⁸,Dunn Philip J. H.⁹^ORCID,Gröning Manfred¹⁰,Holden Norman E.¹¹,Meijer Harro A. J.¹²,Moossen Heiko¹³,Possolo Antonio¹⁴,Takahashi Yoshio¹⁵,Vogl Jochen¹⁶,Walczyk Thomas¹⁷,Wang Jun²,Wieser Michael E.⁵,Yoneda Shigekazu¹⁸,Zhu Xiang-Kun¹⁹,Meija Juris²⁰^ORCID

Affiliation:

1. Montanuniversität Leoben , Leoben , Austria

2. National Institute of Metrology , Beijing , China

3. University of Natural Resources and Life Sciences Vienna , Tulln , Austria

4. Helmholtz-Zentrum Hereon , Geesthacht , Germany

5. University of Calgary , Calgary , Canada

6. U.S. Geological Survey , Reston , VA , USA

7. PAE, contractor at the Defense POW/MIA Accounting Agency (DPAA) Laboratory , Joint Base Pearl Harbor-Hickam , HI , USA

8. Institute of Mineral Resources, Chinese Academy of Geological Sciences , Beijing , China

9. National Measurement Laboratory, LGC , Teddington , UK

10. Terrestrial Environmental Radiochemistry Laboratory, Department of Nuclear Sciences and Applications , International Atomic Energy Agency , Vienna , Austria

11. National Nuclear Data Center, Brookhaven National Laboratory , Upton , NY , USA

12. Centre for Isotope Research (CIO), University of Groningen , Groningen , The Netherlands

13. Max Planck Institute for Biogeochemistry , Jena , Germany

14. National Institute of Standards and Technology , Gaithersburg , MD , USA

15. The University of Tokyo , Tokyo , Japan

16. Bundesanstalt für Materialforschung und -prüfung (BAM) , Berlin , Germany

17. Department of Chemistry , National University of Singapore , Singapore , Singapore

18. National Museum of Nature and Science , Tokyo , Japan

19. Institute of Geology, Chinese Academy of Geological Sciences , Beijing , China

20. National Research Council of Canada , Ottawa , Canada

Abstract

Abstract Following the reviews of atomic-weight determinations and other cognate data in 2015, 2017, 2019 and 2021, the IUPAC (International Union of Pure and Applied Chemistry) Commission on Isotopic Abundances and Atomic Weights (CIAAW) reports changes of standard atomic weights. The symbol A r°(E) was selected for standard atomic weight of an element to distinguish it from the atomic weight of an element E in a specific substance P, designated A r(E, P). The CIAAW has changed the values of the standard atomic weights of five elements based on recent determinations of terrestrial isotopic abundances:

Ar (argon): from 39.948 ± 0.001 to [39.792, 39.963] Hf (hafnium): from 178.49 ± 0.02 to 178.486 ± 0.006 Ir (iridium): from 192.217 ± 0.003 to 192.217 ± 0.002 Pb (lead): from 207.2 ± 0.1 to [206.14, 207.94] Yb (ytterbium): from 173.054 ± 0.005 to 173.045 ± 0.010

The standard atomic weight of argon and lead have changed to an interval to reflect that the natural variation in isotopic composition exceeds the measurement uncertainty of A r(Ar) and A r(Pb) in a specific substance. The standard atomic weights and/or the uncertainties of fourteen elements have been changed based on the Atomic Mass Evaluations 2016 and 2020 accomplished under the auspices of the International Union of Pure and Applied Physics (IUPAP). A r° of Ho, Tb, Tm and Y were changed in 2017 and again updated in 2021:

Al (aluminium), 2017: from 26.981 5385 ± 0.000 0007 to 26.981 5384 ± 0.000 0003 Au (gold), 2017: from 196.966 569 ± 0.000 005 to 196.966 570 ± 0.000 004 Co (cobalt), 2017: from 58.933 194 ± 0.000 004 to 58.933 194 ± 0.000 003 F (fluorine), 2021: from 18.998 403 163 ± 0.000 000 006 to 18.998 403 162 ± 0.000 000 005 (Ho (holmium), 2017: from 164.930 33 ± 0.000 02 to 164.930 328 ± 0.000 007) Ho (holmium), 2021: from 164.930 328 ± 0.000 007 to 164.930 329 ± 0.000 005 Mn (manganese), 2017: from 54.938 044 ± 0.000 003 to 54.938 043 ± 0.000 002 Nb (niobium), 2017: from 92.906 37 ± 0.000 02 to 92.906 37 ± 0.000 01 Pa (protactinium), 2017: from 231.035 88 ± 0.000 02 to 231.035 88 ± 0.000 01 Pr (praseodymium), 2017: from 140.907 66 ± 0.000 02 to 140.907 66 ± 0.000 01 Rh (rhodium), 2017: from 102.905 50 ± 0.000 02 to 102.905 49 ± 0.000 02 Sc (scandium), 2021: from 44.955 908 ± 0.000 005 to 44.955 907 ± 0.000 004 (Tb (terbium), 2017: from 158.925 35 ± 0.000 02 to 158.925 354 ± 0.000 008) Tb (terbium), 2021: from 158.925 354 ± 0.000 008 to 158.925 354 ± 0.000 007 (Tm (thulium), 2017: from 168.934 22 ± 0.000 02 to 168.934 218 ± 0.000 006) Tm (thulium), 2021: from 168.934 218 ± 0.000 006 to 168.934 219 ± 0.000 005 (Y (yttrium), 2017: from 88.905 84 ± 0.000 02 to 88.905 84 ± 0.000 01) Y (yttrium), 2021: from 88.905 84 ± 0.000 01 to 88.905 838 ± 0.000 002

Publisher

Walter de Gruyter GmbH

Subject

General Chemical Engineering,General Chemistry

Link

https://www.degruyter.com/document/doi/10.1515/pac-2019-0603/pdf

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