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Lanthanum monosulfide


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 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, 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.

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]

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]

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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