Cesium

• Formula: Cs
• Molecular weight: 132.9054519
• IUPAC Standard InChI: InChI=1S/Cs Copy

  
• IUPAC Standard InChIKey: TVFDJXOCXUVLDH-UHFFFAOYSA-N Copy
• CAS Registry Number: 7440-46-2
• Chemical structure:
  This structure is also available as a 2d Mol file
• Other names: Caesium
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase ion energetics data
  • Ion clustering data
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data
• Data at other public NIST sites:
  • NIST Atomic Spectra Database - Lines Holdings (on physics web site)
  • NIST Atomic Spectra Database - Levels Holdings (on physics web site)
  • NIST Atomic Spectra Database - Ground states and ionization energies (on physics web site)
  • Gas Phase Kinetics Database
  • X-ray Photoelectron Spectroscopy Database, version 5.0
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• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

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Gas phase ion energetics data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data evaluated as indicated in comments:
L - Sharon G. Lias

Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

View reactions leading to Cs⁺ (ion structure unspecified)

Electron affinity determinations

Ionization energy determinations

Ion clustering data

Go To: Top, Gas phase ion energetics data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

( • 4294967295) +  =

By formula: (Br^- • 4294967295Cs) + Cs = Br^-

References

Go To: Top, Gas phase ion energetics data, Ion clustering data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Scheer, Tho/gersen, et al., 1998
Scheer, M.; Tho/gersen, J.; Bilodeau, R.C.; Brodie, C.A.; Haugen, H.K., Experimental Evidence that the 6s6p2Pj States of Cs- are Shape Resonances, Phys. Rev. Lett., 1998, 80, 4, 684, https://doi.org/10.1103/PhysRevLett.80.684 . [all data]

Slater, Read, et al., 1978
Slater, J.; Read, F.H.; Novick, S.E.; Lineberger, W.C., Alkali Negative Ions. III. Multichannel Photodetachment of Cs- and K-, Phys. Rev. A, 1978, 17, 1, 201, https://doi.org/10.1103/PhysRevA.17.201 . [all data]

Patterson, Hotop, et al., 1974
Patterson, T.A.; Hotop, H.; Kasdan, A.; Norcross, D.W.; Lineberger, W.C., Resonances in Alkali Negative-Ion Photodetachment and Electron Affinities of the Corresponding Neutrals, Phys. Rev. Lett., 1974, 32, 5, 189, https://doi.org/10.1103/PhysRevLett.32.189 . [all data]

Lide, 1992
Lide, D.R. (Editor), Ionization potentials of atoms and atomic ions in Handbook of Chem. and Phys., 1992, 10-211. [all data]

Busse and Weil, 1982
Busse, B.; Weil, K.G., Mass spectrometric studies on the vapour phase composition over solid and fused Cs₃Sb, Ber. Bunsen-Ges. Phys. Chem., 1982, 86, 93. [all data]

Williams and Potts, 1976
Williams, T.A.; Potts, A.W., Complexities in the HeI photoelectron spectra of alkali metal vapours, J. Electron Spectrosc. Relat. Phenom., 1976, 8, 331. [all data]

Nygaard and Hahn, 1974
Nygaard, K.J.; Hahn, Y.B., Ion fluorescene in cesium, Physica, 1974, 75, 333. [all data]

Moore, 1970
Moore, C.E., Ionization potentials and ionization limits derived from the analyses of optical spectra, Natl. Stand. Ref. Data Ser., (U.S. Natl. Bur. Stand.), 1970, 34, 1. [all data]

Miller, Leopold, et al., 1986
Miller, T.M.; Leopold, D.G.; Murray, K.K.; Lineberger, W.C., Electron Affinities of the Alkali Halides and the Structure of their Negative Ions, J. Chem. Phys., 1986, 85, 5, 2368, https://doi.org/10.1063/1.451091 . [all data]

Notes

Go To: Top, Gas phase ion energetics data, Ion clustering data, References

• Symbols used in this document:
  

  EA	Electron affinity
  IE (evaluated)	Recommended ionization energy
  ΔrH°	Enthalpy of reaction at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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