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Lanthanum monosulfide


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 by: Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Ionization energy determinations

IE (eV) Method Reference
~5.EICater, Lee, et al., 1965

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
La+~12.SEICater, Lee, et al., 1965 

Constants of diatomic molecules

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: Klaus P. Huber and Gerhard H. Herzberg

Data collected through February, 1975

Symbols used in the table of constants
SymbolMeaning
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 139La32S
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
Strong absorption in the region 22200 - 23800 cm-1. Complex Structure.
Marcano and Barrow, 1970
B 2Sigma+ 13790.17 410.075 H 0.94  [0.11099] 1 (0.00034)  [0.031E-6]  [2.4174] B lrarrow X R 13766.86 Z
Marcano and Barrow, 1970
X 2Sigma+ 0 456.70 H 0.965  [0.11693] 2 (0.00034)  [0.030E-6]  [2.3552]  

Notes

1Large spin-splittings, gamma0 = (-)0.09627.
2Large hyperfine splittings, 4b = 0.47 cm-1.
3Thermochemical value (mass-spectrometry) Cater, Lee, et al., 1965, Coppens, Smoes, et al., 1967, Cater and Steiger, 1968, Bergman, Coppens, et al., 1970.

References

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.

Cater, Lee, et al., 1965
Cater, E.D.; Lee, T.E.; Johnson, E.W.; Rauh, E.G.; Eick, H.A., Vaporization, thermodynamics, and dissociation energy of lanthanum monosulfide, J. Phys. Chem., 1965, 69, 2684. [all data]

Marcano and Barrow, 1970
Marcano, M.; Barrow, R.F., Analysis of the transition B2«SIGMA»+-X2«SIGMA»+ in gaseous LaS, J. Phys. B:, 1970, 3, 121. [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]

Cater and Steiger, 1968
Cater, E.D.; Steiger, R.P., Vaporization, thermodynamics, and dissociation energy of lanthanum monosulfide. II, J. Phys. Chem., 1968, 72, 2231. [all data]

Bergman, Coppens, et al., 1970
Bergman, C.; Coppens, P.; Drowart, J.; Smoes, S., Mass spectrometric determination of the dissociation energies of the gaseous rare earth monoselenides and monotellurides, Trans. Faraday Soc., 1970, 66, 800. [all data]


Notes

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