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Cerium monoxide

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 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

View reactions leading to CeO+ (ion structure unspecified)

Ionization energy determinations

IE (eV) Method Reference Comment
4.9 ± 0.1EIAckermann, Rauh, et al., 1976LLK
5.3 ± 0.5EIPiacente, Bardi, et al., 1973LLK
6.0 ± 0.5EIGingerich and Pupp, 1971LLK
5.2 ± 0.2EIAckermann and Rauh, 1971LLK
5.2 ± 0.5EIStaley and Norman, 1969RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
Ce+~13.5OEIAckermann and Rauh, 1971LLK

Constants of diatomic molecules

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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 compiled by: Klaus P. Huber and Gerhard H. Herzberg

Data collected through December, 1974

Symbols used in the table of constants
State electronic state and / or symmetry symbol
Te minimum electronic energy (cm-1)
ωe vibrational constant – first term (cm-1)
ωexe vibrational constant – second term (cm-1)
ωeye vibrational constant – third term (cm-1)
Be rotational constant in equilibrium position (cm-1)
αe rotational constant – first term (cm-1)
γe rotation-vibration interaction constant (cm-1)
De centrifugal distortion constant (cm-1)
βe rotational constant – first term, centrifugal force (cm-1)
re internuclear distance (Å)
Trans. observed transition(s) corresponding to electronic state
ν00 position of 0-0 band (units noted in table)
Diatomic constants for (140)Ce16O
Large number of bands in the region 11000 - 29000 cm-1 Gatterer, Junkes, et al., 1957*. Tentative assignments by Ames and Barrow, 1967 Rosen, 1970, revising earlier assignments in Watson, 1938 Gatterer, Junkes, et al., 1957.
D1           D1 lrarrow X1 R 21379.1 HQ
Ames and Barrow, 1967; Rosen, 1970
F2  (772)   [0.35290]   [2.95E-07]  [1.82426] F2 lrarrow X2 R 20834.21 Z
Ames and Barrow, 1967; Rosen, 1970; Watson, 1938
D3           D3 lrarrow X3 R 20516.1 HQ
Rosen, 1970; Watson, 1938
C1  (798)   [0.34984]   [2.69E-07]  [1.832222] C1 lrarrow X1 R 20273.84 Z
Ames and Barrow, 1967; Rosen, 1970
A4           A4 lrarrow X4 R 19871.7 HQ
Rosen, 1970
C3           C3 lrarrow X3 R 16356.9 HR
Rosen, 1970
G 1Pi           G lrarrow Y1 R 15035.40 HQ
Rosen, 1970
B2  (771)   [0.34705]   [2.81E-07]  [1.83958] B2 lrarrow X2 R 13804.01 Z
Ames and Barrow, 1967; Rosen, 1970; Watson, 1938
A2           A2 lrarrow X2 R 12687.91 HQ
Rosen, 1970; Watson, 1938
A1  (749)   [0.34672]   [2.97E-07]  [1.84045] A1 lrarrow X1 R 12595.75 Z
Ames and Barrow, 1967; Rosen, 1970
A3           A3 lrarrow X3 V 12162.20 HQ
Rosen, 1970
Y4 (3Delta3) 1  (886)   [0.35065]   [0.00000023]  [1.8301]  
Y3 (3Delta2) 1  (509)   [0.3614]   [0.00000073]  [1.8027]  
Y2 (3Delta1) 1  (884)   [0.35214]   [0.000000245]  [1.82623]  
Y1 1Sigma(+) 1  (850)   [0.35790]   [0.000000254]  [1.81148]  
X4 (1Phi3) 1 x2 + 2065 2 (818)   0.35710 0.00108  [0.000000271]  1.81350  
X3 3Phi4 1  (932)   0.35377 0.00114  [0.000000203]  1.82202  
X2 3Phi3 1 x2 [822.76] (Z) (3.09)  0.35779 0.00179  [0.000000269]  1.81175  
X1 3Pi2 1  (862)   [0.35452]   [2.40E-07]  1.82009  


1These states give rise to absorption bands at a temperature of 2173 K Rosen, 1970. No details given for transitions from Y2, Y3, Y4.
2X4(v=0) is at 2060.25 cm-1 above X2(v=0). All other separations are unknown [ Rosen, 1970, no details].
3Thermochemical value (mass-spectrom.) Walsh, Dever, et al., 1961, Ames, Walsh, et al., 1967, Coppens, Smoes, et al., 1967, Ackermann and Rauh, 1974.


Go To: Top, Gas phase ion energetics data, Constants of diatomic molecules, Notes

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

Ackermann, Rauh, et al., 1976
Ackermann, R.J.; Rauh, E.G.; Thorn, R.J., The thermodynamics of ionization of gaseous oxides; the first ionization potentials of the lanthanide metals and monoxides, J. Chem. Phys., 1976, 65, 1027. [all data]

Piacente, Bardi, et al., 1973
Piacente, V.; Bardi, G.; Malaspina, L.; Desideri, A., Dissociation energy of CeO2 and Ce2O2 molecules, J. Chem. Phys., 1973, 59, 31. [all data]

Gingerich and Pupp, 1971
Gingerich, K.A.; Pupp, C., Mass spectrometric determination of the heats of formation atomization of gaseous AuBO, J. Chem. Phys., 1971, 54, 3713. [all data]

Ackermann and Rauh, 1971
Ackermann, R.J.; Rauh, E.G., A high-temperature study of the stoichiometry, phase behavior, vaporization characteristics, and thermodynamic properties of the cerium + oxygen system, J. Chem. Thermodyn., 1971, 3, 609. [all data]

Staley and Norman, 1969
Staley, H.G.; Norman, J.H., Thermodynamics of gaseous monoxide-dioxide equilibria for cerium, praseodymium and neodymium, Intern. J. Mass Spectrom. Ion Phys., 1969, 2, 35. [all data]

Gatterer, Junkes, et al., 1957
Gatterer, A.; Junkes, J.; Salpeter, E.W., Molecular spectra of metallic oxides, Specola Vaticana, Citta del Vaticano, 1957, 0. [all data]

Ames and Barrow, 1967
Ames, L.L.; Barrow, R.F., Rotational analysis of absorption bands of CeO, Proc. Phys. Soc. London, 1967, 90, 869. [all data]

Rosen, 1970
Rosen, B., International tables of selected constants. 17. Spectroscopic data relative to diatomic molecules, Pub. Pergamon Press, Oxford, 1970, 0. [all data]

Watson, 1938
Watson, W.W., Spectra of the monoxides of cerium and praseodymium, Phys. Rev., 1938, 53, 639. [all data]

Walsh, Dever, et al., 1961
Walsh, P.N.; Dever, D.F.; White, D., Rare Earths. III. A mass-spectrometric investigation of the isomolecular oxygen-exchange reactions of lanthanum, cerium, praseodymium and neodymium with their monoxides, J. Phys. Chem., 1961, 65, 1410. [all data]

Ames, Walsh, et al., 1967
Ames, L.L.; Walsh, P.N.; White, D., Rare earths. IV. Dissocaition energies of the gaseous monoxides of the rare earths, J. Phys. Chem., 1967, 71, 2707. [all data]

Coppens, Smoes, et al., 1967
Coppens, P.; Smoes, S.; Drowart, J., Mass spectrometric determination of the dissociation energies of the molecules GeS, ScS, YS, LaS, and CeS, Trans. Faraday Soc., 1967, 63, 2140. [all data]

Ackermann and Rauh, 1974
Ackermann, R.J.; Rauh, E.G., Thermodynamic properties of ZrO (g) and HfO (g); a critical examination of isomolecular oxygen-exchange reactions, J. Chem. Phys., 1974, 60, 2266. [all data]


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