uranium trioxide

Formula: O₃U
Molecular weight: 286.0271
CAS Registry Number: 1344-58-7
Information on this page:
Other data available:
- Condensed phase thermochemistry data
Data at other public NIST sites:
- X-ray Photoelectron Spectroscopy Database, version 5.0
- X-ray Photoelectron Spectroscopy Database, version 5.0
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Gas phase ion energetics data

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Data compiled as indicated in comments:
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

Electron affinity determinations

EA (eV)	Method	Reference	Comment
<2.12484	IMRB	Rudnyi, Kaibicheva, et al., 1992	Upper limit based on non-observation; B

Ionization energy determinations

IE (eV)	Method	Reference	Comment
10.6 ± 0.1	EI	Rauh and Ackermann, 1974	LLK
9.5 ± 1.5	EI	Blackburn and Danielson, 1972	LLK
11.1 ± 0.4	EI	Pattoret, Drowart, et al., 1968	RDSH
10.4 ± 0.6	EI	DeMaria, Burns, et al., 1960	RDSH

Vibrational and/or electronic energy levels

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Data compiled by: Marilyn E. Jacox

State: X

Vib. sym.	No.	Approximate type of mode	cm^-1	Med.	Method	References


a₁	1	UO stretch	843.5	Ar	IR	Gabelnick, Reedy, et al., 1973 Gabelnick, Reedy, et al., 1973, 2
	2	UO₂ s-stretch	760.3	Ne	IR	Zhou, Andrews, et al., 2000
	2	UO₂ s-stretch	745.6	Ar	IR	Gabelnick, Reedy, et al., 1973 Gabelnick, Reedy, et al., 1973, 2 Hunt and Andrews, 1993 Sankaran, Sundararajan, et al., 1999 Zhou, Andrews, et al., 2000
	2	UO₂ s-stretch	740.7	Kr	IR	Gabelnick, Reedy, et al., 1973
	3	Bend	186.2	Ar	IR	Green, Reedy, et al., 1980
b₁	4	OPLA	151.5	Ar	IR	Green, Reedy, et al., 1980
b₂	5	UO₂ a-stretch	865.3	Ne	IR	Zhou, Andrews, et al., 2000
	5	UO₂ a-stretch	852.6	Ar	IR	Gabelnick, Reedy, et al., 1973 Gabelnick, Reedy, et al., 1973, 2 Hunt and Andrews, 1993 Sankaran, Sundararajan, et al., 1999 Zhou, Andrews, et al., 2000
	5	UO₂ a-stretch	848.1	Kr	IR	Gabelnick, Reedy, et al., 1973
	6	Bend	211.6	Ar	IR	Green, Reedy, et al., 1980

Additional references: Jacox, 1998, page 251; Jacox, 2003, page 228

References

Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, Notes

Rudnyi, Kaibicheva, et al., 1992
Rudnyi, E.B.; Kaibicheva, E.A.; Sidorov, L.N., The Electron Affinity of UO3-, Rapid Commun. Mass Spectrom., 1992, 6, 5, 356, https://doi.org/10.1002/rcm.1290060510 . [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]

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]

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]

DeMaria, Burns, et al., 1960
DeMaria, G.; Burns, R.P.; Drowart, J.; Inghram, M.G., Mass spectrometric study of gaseous molybdenum, tungsten, and uranium oxides, J. Chem. Phys., 1960, 32, 1373. [all data]

Gabelnick, Reedy, et al., 1973
Gabelnick, S.D.; Reedy, G.T.; Chasanov, M.G., Infrared spectra of matrix-isolated uranium oxide species. I. The stretching region, J. Chem. Phys., 1973, 58, 10, 4468, https://doi.org/10.1063/1.1679009 . [all data]

Gabelnick, Reedy, et al., 1973, 2
Gabelnick, S.D.; Reedy, G.T.; Chasanov, M.G., Infrared spectra of matrix-isolated uranium oxide species. II. Spectral interpretation and structure of UO3, J. Chem. Phys., 1973, 59, 12, 6397, https://doi.org/10.1063/1.1680018 . [all data]

Zhou, Andrews, et al., 2000
Zhou, M.; Andrews, L.; Ismail, N.; Marsden, C., Infrared Spectra of UO, J. Phys. Chem. A, 2000, 104, 23, 5495, https://doi.org/10.1021/jp000292q . [all data]

Hunt and Andrews, 1993
Hunt, R.D.; Andrews, L., Reactions of pulsed-laser evaporated uranium atoms with molecular oxygen: Infrared spectra of UO, UO2, UO3, UO2+, UO22+, and UO3--O2 in solid argon, J. Chem. Phys., 1993, 98, 5, 3690, https://doi.org/10.1063/1.464045 . [all data]

Sankaran, Sundararajan, et al., 1999
Sankaran, K.; Sundararajan, K.; Viswanathan, K.S., A matrix isolation FTIR investigation of laser-ablated uranium oxide in argon and nitrogen matrices, Bull. Mater. Sci., 1999, 22, 4, 785, https://doi.org/10.1007/BF02745606 . [all data]

Green, Reedy, et al., 1980
Green, D.W.; Reedy, G.T.; Gabelnick, S.D., Infrared spectra of matrix-isolated uranium oxides. III. Low-frequency modes, J. Chem. Phys., 1980, 73, 9, 4207, https://doi.org/10.1063/1.440704 . [all data]

Jacox, 1998
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement A, J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017 . [all data]

Jacox, 2003
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement B, J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629 . [all data]

Notes

Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, References

Symbols used in this document:

EA Electron affinity
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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