โ–ธโ–ธ
  • ๐Ÿ‡ฌ๐Ÿ‡ง Tungsten
  • ๐Ÿ‡บ๐Ÿ‡ฆ ะ’ะพะปัŒั„ั€ะฐะผ
  • ๐Ÿ‡จ๐Ÿ‡ณ ้Žข
  • ๐Ÿ‡ณ๐Ÿ‡ฑ Wolfraam
  • ๐Ÿ‡ซ๐Ÿ‡ท Tungstène
  • ๐Ÿ‡ฉ๐Ÿ‡ช Wolfram
  • ๐Ÿ‡ฎ๐Ÿ‡ฑ ื˜ื•ื ื’ืกื˜ืŸ
  • ๐Ÿ‡ฎ๐Ÿ‡น Tungsteno (wolframio)
  • ๐Ÿ‡ฏ๐Ÿ‡ต ใ‚ฟใƒณใ‚ฐใ‚นใƒ†ใƒณ
  • ๐Ÿ‡ต๐Ÿ‡น Tungstênio
  • ๐Ÿ‡ช๐Ÿ‡ธ Wolframio
  • ๐Ÿ‡ธ๐Ÿ‡ช Volfram
  • ๐Ÿ‡ท๐Ÿ‡บ ะ’ะพะปัŒั„ั€ะฐะผ

Tungsten - 74W: isotope data

Tungsten isotopes are used in several applications. W-180 is used for the production of the therapeutic radioisotope W-181. W-186 is used for the production of W-188 which is used in so-called Tungsten-Rhenium generators. The W-188 daughter Re-188 is (milked( from there generators and used as a therapeutic radioisotope. W-184 has been used to study the elastic and inelastic scattering of heavy ions.

Naturally occurring isotopes

This table shows information about naturally occuring isotopes, their atomic masses, their natural abundances, their nuclear spins, and their magnetic moments. Further data for radioisotopes (radioactive isotopes) of tungsten are listed (including any which occur naturally) below.
Isotope Mass / Da Natural abundance (atom %) Nuclear spin (I) Magnetic moment (μ/μN)
180W 179.946701 (5) 0.12 (1) 0
182W 181.948202 (3) 26.50 (16) 0
183W 182.950220 (3) 14.31 (4) 1/2 0.1177847
184W 183.950928 (3) 30.64 (2) 0
186W 185.954357 (4) 28.43 (19) 0
Isotope abundances of tungsten
Isotope abundances of tungsten. In the above, the most intense ion is set to 100% since this corresponds best to the output from a mass spectrometer. This is not to be confused with the relative percentage isotope abundances which totals 100% for all the naturally occurring isotopes.

Radiosotope data

Further data for naturally occuring isotopes of tungsten are listed above. This table gives information about some radiosotopes of tungsten, their masses, their half-lives, their modes of decay, their nuclear spins, and their nuclear magnetic moments.
Isotope Mass / Da Half-life Mode of decay Nuclear spin Nuclear magnetic moment
178W 177.9459 21.6 d EC to 178Ta 0
179W 178.94707 38 m EC to 179Ta 7/2
181W 180.94820 121.2 d EC to 181Ta 9/2
185W 184.953420 74.8 d β- to 185Re 3/2
187W 186.957158 23.9 h β- to 187Re 3/2 0.62
188W 187.958487 69.4 d β- to 188Re 0

References

  1. Naturally occurring isotope abundances: Commission on Atomic Weights and Isotopic Abundances report for the International Union of Pure and Applied Chemistry in Isotopic Compositions of the Elements 1989, Pure and Applied Chemistry, 1998, 70, 217. [Copyright 1998 IUPAC]
  2. For further information about radioisotopes see Jonghwa Chang's (Korea Atomic Energy Research Institute) Table of the Nuclides
  3. Masses, nuclear spins, and magnetic moments: I. Mills, T. Cvitas, K. Homann, N. Kallay, and K. Kuchitsu in Quantities, Units and Symbols in Physical Chemistry, Blackwell Scientific Publications, Oxford, UK, 1988. [Copyright 1988 IUPAC]

NMR Properties of tungsten

Common reference compound: Na2WO4/D2O.

Table of NMR-active nucleus propeties of tungsten
  Isotope 1 Isotope 2 Isotope 3
Isotope 182W 183W
Natural abundance /% 14.3
Spin (I) 1/2
Frequency relative to 1H = 100 (MHz) 4.166398
Receptivity, DP, relative to 1H = 1.00 0.0000107
Receptivity, DC, relative to 13C = 1.00 0.0613
Magnetogyric ratio, γ (107 rad T‑1 s-1) 1.1282403
Magnetic moment, μ (μN) 0.20400919
Nuclear quadrupole moment, Q/millibarn -2130(350) [Mössbauer state] -
Line width factor, 1056 l (m4) -

References

  1. R.K. Harris in Encyclopedia of Nuclear Magnetic Resonance, D.M. Granty and R.K. Harris, (eds.), vol. 5, John Wiley & Sons, Chichester, UK, 1996. I am grateful to Professor Robin Harris (University of Durham, UK) who provided much of the NMR data, which are copyright 1996 IUPAC, adapted from his contribution contained within this reference.
  2. J. Mason in Multinuclear NMR, Plenum Press, New York, USA, 1987. Where given, data for certain radioactive nuclei are from this reference.
  3. P. Pyykkö, Mol. Phys., 2008, 106, 1965-1974.
  4. P. Pyykkö, Mol. Phys., 2001, 99, 1617-1629.
  5. P. Pyykkö, Z. Naturforsch., 1992, 47a, 189. I am grateful to Professor Pekka Pyykkö (University of Helsinki, Finland) who provided the nuclear quadrupole moment data in this and the following two references.
  6. D.R. Lide, (ed.), CRC Handbook of Chemistry and Physics 1999-2000 : A Ready-Reference Book of Chemical and Physical Data (CRC Handbook of Chemistry and Physics, CRC Press, Boca Raton, Florida, USA, 79th edition, 1998.
  7. P. Pyykkö, personal communication, 1998, 204, 2008, 2010.