Atomic weights of the elements 2007 (IUPAC Technical Report)

Wieser, Michael E.; Berglund, Michael

doi:10.1351/pac-rep-09-08-03

Cited by 179 publications

(120 citation statements)

References 79 publications

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“…Confusion resulted when Nier's isotope ratios were converted to mole fractions, then reconverted to ratios, with the result that 295.5 was adopted as a conventional atmospheric 40 Ar/ 36 Ar ratio for geochronology [9]. In 2007 [19], IUPAC adopted new values for the isotope ratios of atmospheric Ar based on partially calibrated measurements by Lee et al [4], as summarized in Table 1. It is emphasized that purified Ar gas separated from air for commercial purposes (i.e., "tank Ar") may not have the same isotopic composition as atmospheric Ar because of isotopic fractionation during the processing of the gas.…”

Section: Reference Materials and Reporting Of Isotope Ratiosmentioning

confidence: 99%

Variation in the terrestrial isotopic composition and atomic weight of argon (IUPAC Technical Report)

Böhlke

2014

Pure and Applied Chemistry

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Abstract:The isotopic composition and atomic weight of argon (Ar) are variable in terrestrial materials. Those variations are a source of uncertainty in the assignment of standard properties for Ar, but they provide useful information in many areas of science. Variations in the stable isotopic composition and atomic weight of Ar are caused by several different processes, including (1) isotope production from other elements by radioactive decay (radiogenic isotopes) or other nuclear transformations (e.g., nucleogenic isotopes), and (2) Ar) at various levels of precision are widely used for studies in geochronology, water-rock interaction, atmospheric evolution, and other fields.

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Section: Reference Materials and Reporting Of Isotope Ratiosmentioning

confidence: 99%

Variation in the terrestrial isotopic composition and atomic weight of argon (IUPAC Technical Report)

Böhlke

2014

Pure and Applied Chemistry

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“…15 26 The relative atomic masses of the 11 elements have been presented as an interval, in the latest IUPAC technical report 2009. 27 Since the values reported in the IUPAC Commission in 2007 28 are within the presented interval, we choose to use the relative atomic masses recommended by the IUPAC report 2007 in this work. 28 All the uncertainties are given as twice of the standard deviation of the mean, and include the calibration uncertainty.…”

Section: A High-precision Heat Capacity Drop Calorimetrymentioning

confidence: 99%

“…27 Since the values reported in the IUPAC Commission in 2007 28 are within the presented interval, we choose to use the relative atomic masses recommended by the IUPAC report 2007 in this work. 28 All the uncertainties are given as twice of the standard deviation of the mean, and include the calibration uncertainty. The buoyancy effect correction was considered both for the calibration and experiments of the ionic liquids.…”

Section: A High-precision Heat Capacity Drop Calorimetrymentioning

confidence: 99%

Evidence of nanostructuration from the heat capacities of the 1,3-dialkylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquid series

Rocha

Coutinho

Santos

2013

The Journal of Chemical Physics

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“…By publication of the 2007 TSAW [14], the number of these elements had grown to 18. The Commission clearly recognized that the number of elements with this footnote would certainly grow as new technology developed, stating [4]:…”

Section: History Of Footnote "R" Range In Isotopic Composition Of Nomentioning

confidence: 99%

Review of footnotes and annotations to the 1949–2013 tables of standard atomic weights and tables of isotopic compositions of the elements (IUPAC Technical Report)

Coplen

Holden

2016

Pure and Applied Chemistry

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Abstract:The Commission on Isotopic Abundances and Atomic Weights uses annotations given in footnotes that are an integral part of the Tables of Standard Atomic Weights to alert users to the possibilities of quite extraordinary occurrences, as well as sources with abnormal atomic-weight values outside an otherwise acceptable range. The basic need for footnotes to the Standard Atomic Weights Table and equivalent annotations to the Table of Isotopic Compositions of the Elements arises from the necessity to provide users with information that is relevant to one or more elements, but that cannot be provided using numerical data in columns. Any desire to increase additional information conveyed by annotations to these Tables is tempered by the need to preserve a compact format and a style that can alert users, who would not be inclined to consult either the last full element-by-element review or the full text of a current Standard Atomic Weights of the Elements report. Since 1989, the footnotes of the Tables of Standard Atomic Weights and the annotations in column 5 of the Table of Isotopic Compositions of the Elements have been harmonized by use of three lowercase footnotes, "g", "m", and "r", that signify geologically exceptionally specimens ("g"), modified isotopic compositions in material subjected to undisclosed or inadvertent isotopic fractionation ("m"), and the range in isotopic composition of normal terrestrial material prevents more precise atomic-weight value being given ("r"). As some elements are assigned intervals for their standard atomic-weight values (applies to 12 elements since 2009), footnotes "g" and "r" are no longer needed for these elements.

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Atomic weights of the elements 2007 (IUPAC Technical Report)

Abstract: Abstract:The latest evaluation of atomic weight determinations and other cognate data has warranted five changes for the standard atomic weights of the elements, A r (E), from those published previously in the

Cited by 179 publications

References 79 publications

Variation in the terrestrial isotopic composition and atomic weight of argon (IUPAC Technical Report)

Variation in the terrestrial isotopic composition and atomic weight of argon (IUPAC Technical Report)

Evidence of nanostructuration from the heat capacities of the 1,3-dialkylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquid series

Review of footnotes and annotations to the 1949–2013 tables of standard atomic weights and tables of isotopic compositions of the elements (IUPAC Technical Report)

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