Literature DB >> 31824010

Absolute Isotopic Abundance Ratios and Atomic Weight of Magnesium.

Edward J Catanzaro1, Thomas J Murphy1, Ernest L Garner1, William R Shields1.   

Abstract

Absolute values have been obtained for the isotopic abundance ratios of magnesium, using surface emission mass spectrometry. Samples of known isotopic composition, prepared from nearly pure separated magnesium isotopes, were used to calibrate the mass spectrometers. The resulting absolute values are 25Mg/24Mg = 0.12663 ±0.00013 and 26Mg/24Mg = 0.13932 ± 0.00026, yielding an atomic weight (12C = 12) of 24.30497 ±0.00044. The indicated uncertainties are overall limits of error based on 95 percent confidence limits for the mean and allowances for effects of known sources of possible systematic error.

Entities:  

Keywords:  Absolute ratios; atomic weight; isotopic abundances; magnesium

Year:  1966        PMID： 31824010      PMCID： PMC6624704          DOI： 10.6028/jres.070A.037

Source DB:  PubMed          Journal:  J Res Natl Bur Stand A Phys Chem        ISSN： 0022-4332


  6 in total

1.  A 4,565-My-old andesite from an extinct chondritic protoplanet.

Authors:  Jean-Alix Barrat; Marc Chaussidon; Akira Yamaguchi; Pierre Beck; Johan Villeneuve; David J Byrne; Michael W Broadley; Bernard Marty
Journal:  Proc Natl Acad Sci U S A       Date:  2021-03-08       Impact factor: 11.205

2.  A Coordinated Microstructural and Isotopic Study of a Wark-Lovering Rim on a Vigarano CAI.

Authors:  Jangmi Han; Lindsay P Keller; Ming-Chang Liu; Andrew W Needham; Andreas T Hertwig; Scott Messenger; Justin I Simon
Journal:  Geochim Cosmochim Acta       Date:  2020-01-15       Impact factor: 5.010

3.  The 26Al-26Mg systematics of FeO-rich chondrules from Acfer 094: two chondrule generations distinct in age and oxygen isotope ratios.

Authors:  Andreas T Hertwig; Kimura Makoto; Takayuki Ushikubo; Céline Defouilloy; Noriko T Kita
Journal:  Geochim Cosmochim Acta       Date:  2019-05-15       Impact factor: 5.010

4.  Extended chondrule formation intervals in distinct physicochemical environments: Evidence from Al-Mg isotope systematics of CR chondrite chondrules with unaltered plagioclase.

Authors:  Travis J Tenner; Daisuke Nakashima; Takayuki Ushikubo; Naotaka Tomioka; Makoto Kimura; Michael K Weisberg; Noriko T Kita
Journal:  Geochim Cosmochim Acta       Date:  2019-06-22       Impact factor: 5.010

5.  New constraints from 26Al-26Mg chronology of anorthite bearing chondrules in unequilibrated ordinary chondrites.

Authors:  Guillaume Siron; Kohei Fukuda; Makoto Kimura; Noriko T Kita
Journal:  Geochim Cosmochim Acta       Date:  2020-11-01       Impact factor: 5.010

6.  Half-life and initial Solar System abundance of 146Sm determined from the oldest andesitic meteorite.

Authors:  Linru Fang; Paul Frossard; Maud Boyet; Audrey Bouvier; Jean-Alix Barrat; Marc Chaussidon; Frederic Moynier
Journal:  Proc Natl Acad Sci U S A       Date:  2022-03-15       Impact factor: 12.779
  6 in total

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