uranium

• Formula: U
• Molecular weight: 238.02891
• IUPAC Standard InChI: InChI=1S/U Copy

  
• IUPAC Standard InChIKey: JFALSRSLKYAFGM-UHFFFAOYSA-N Copy
• CAS Registry Number: 7440-61-1
• Chemical structure:
  This structure is also available as a 2d Mol file
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Gas phase ion energetics data
  • References
  • Notes
• Options:
  • Switch to calorie-based units

Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, Gas phase ion energetics data, NIST Free Links, References, Notes

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

Condensed phase thermochemistry data

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, NIST Free Links, References, Notes

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

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, NIST Free Links, References, Notes

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:
HL - Edward P. Hunter and Sharon G. Lias
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

View reactions leading to U⁺ (ion structure unspecified)

Ionization energy determinations

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Gas phase ion energetics data, NIST Free Links, Notes

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

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [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]

Allen, Baerends, et al., 1988
Allen, G.C.; Baerends, E.J.; Vernooijs, P.; Dyke, J.M.; Ellis, A.M.; Feher, M.; Morris, A., High temperature photoelectron spectroscopy: A study of U, UO, and UO₂., J. Chem. Phys., 1988, 89, 5363. [all data]

Lau and Hildenbrand, 1987
Lau, K.H.; Hildenbrand, D.L., Thermochemistry of the gaseous uranium bromides UBr through UBr₅(a), J. Chem. Phys., 1987, 86, 2949. [all data]

Chetverikov, Gabeskiriya, et al., 1981
Chetverikov, A.P.; Gabeskiriya, V.Y.; Puchkov, V.V., Ionization of uranium, plutonium, americium, rhenium, curium, and californium on a rhenium surface, Sov. Phys. Tech. Phys., 1981, 26, 73. [all data]

Gupta and Gingerich, 1979
Gupta, S.K.; Gingerich, K.A., Observation and atomization energies of the gaseous uranium carbides, UC, UC₂, UC₃, UC₄, UC₅, and UC₆ by high temperature mass spectrometry, J. Chem. Phys., 1979, 71, 3072. [all data]

Gingerich and Gupta, 1978
Gingerich, K.A.; Gupta, K.A., Dissociation energies of the molecules RhTh and RhU from high temperature mass spectrometry and predicted thermodynamic stabilities of selected diatomic actinide-platinum metal intermetallic molecules, J. Chem. Phys., 1978, 69, 505. [all data]

Solarz, May, et al., 1976
Solarz, R.W.; May, C.A.; Carlson, L.R.; Worden, E.F.; Johnson, S.A.; Paisner, J.A.; Radziemski, L.J., Jr., Detection of Rydberg states in atomic uranium using time-resolved stepwise laser photoionization, Phys. Rev. A:, 1976, 14, 1129. [all data]

Janes, Itzkan, et al., 1976
Janes, G.S.; Itzkan, I.; Pike, C.T.; Levy, R.H.; Levin, L., Two-photon laser isotope separation of atomic uranium: Spectroscopic studies, excited-state, and photoionization cross section, IEEE J. Quantum Electron., 1976, 12, 111. [all data]

Sugar, 1974
Sugar, J., Revised ionization energies of the neutral actinides, J. Chem. Phys., 1974, 60, 4103. [all data]

Rauh and Ackermann, 1974
Rauh, E.G.; Ackermann, R.J., First ionization potentials of some refractory oxide vapors, J. Chem. Phys., 1974, 60, 1396. [all data]

Sugar, 1973
Sugar, J., Ionization energies of the neutral actinides, J. Chem. Phys., 1973, 59, 788. [all data]

Avni and Klein, 1973
Avni, R.; Klein, F.S., The first ionization potential of uranium and thorium measured in a d.c. arc plasma, Spectrochim. Acta Part B, 1973, 25, 331. [all data]

Blackburn and Danielson, 1972
Blackburn, P.E.; Danielson, P.M., Electron impact relative ionization cross sections fragmentation of U, UO, UO₂, and UO₃, J. Chem. Phys., 1972, 56, 6156. [all data]

Radziemski, Steinhaus, et al., 1970
Radziemski, L.J., Jr.; Steinhaus, D.W.; Cowan, R.D., Present status of the analysis of U_I U_II as derived from measurements of optical spectra, J. Opt. Soc. Am., 1970, 60, 1556. [all data]

Emel'yanov, Khodeev, et al., 1970
Emel'yanov, A.M.; Khodeev, Y.S.; Gorokhov, L.N., Determination of ionization potentials of atomic uranium by electron impact method. I. Measurement of first ionization potential of uranium, Teplofiz. Vys. Temp., 1970, 8, 279, In original 296. [all data]

Pattoret, Drowart, et al., 1968
Pattoret, A.; Drowart, J.; Smoes, S., Etudes thermodynamiques par spectrometrie de masse sur le systeme uranium-oxygene in Thermodyn. Nucl. Mater. Proc. Symp., 1967 Vienna, 1968, 613. [all data]

Cater, Rauh, et al., 1968
Cater, E.D.; Rauh, E.G.; Thorn, R.J., Thermochemistry of UOS; evaporation of US-UO₂ mixtures; on the attainment of equilibrium in Knudsen cells, J. Chem. Phys., 1968, 49, 5244. [all data]

Hertel, 1967
Hertel, G.R., Surface ionization. II. The first ionization potential of uranium, J. Chem. Phys., 1967, 47, 335. [all data]

Mann, 1964
Mann, J.B., Ionization of U, UO, and UO₂ by electron impact, J. Chem. Phys., 1964, 40, 1632. [all data]

Bakulina and Ionov, 1959
Bakulina, I.N.; Ionov, N.I., Determination of the ionization potential of uranium atoms by the surface ionization method, Zh. Eksperim. i Teor. Fiz., 1959, 36, 1001. [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Gas phase ion energetics data, NIST Free Links, References

• Symbols used in this document:
  

  IE (evaluated)	Recommended ionization energy
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  S°solid,1 bar	Entropy of solid at standard conditions (1 bar)
  ΔfH°gas	Enthalpy of formation of gas at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
• The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
• Customer support for NIST Standard Reference Data products.