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Lanthanum monofluoride


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 139La19F
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
EmissionEmission spectra attributed to LaF: three systems of V shaded bands (P and Q heads)
nue = 30188.9, omega'e = 674.7, omega'ex'e = 2.35, omega"e = 603.8, omega"ex"e = 1.96
Shenyavskaya, Gurvich, et al., 1968
nue = 30076.4, omega'e = 682.4, omega'ex'e = 2.28, omega"e = 607.1, omega"ex"e = 1.88
Shenyavskaya, Gurvich, et al., 1965
nue = 28468, omega'e = 657, omega'ex'e = 1.1, omega"e = 607, omega"ex"e = 1.8
Shenyavskaya, Gurvich, et al., 1965
one system of R shaded bands in the region 27500 - 28200 cm-1.
Shenyavskaya, Gurvich, et al., 1965
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
e 3Phi4     [0.2302]   [1.7E-7]  [2.098] e larrow a R 22340.20 Z
Barrow, Lee, et al., 1970
e 3Phi3     [0.2294]   [2.0E-7]  [2.098] e larrow a R 22149.20 Z
Barrow, Lee, et al., 1970
e 3Phi2     [0.2277]   [1.7E-7]  [2.098] e larrow a R 21834.46 Z
Barrow, Lee, et al., 1970
d 3Phi4  [483]   [0.2336]   [2.2E-7]  [2.082] d larrow a R 18809.40 Z
Barrow, Lee, et al., 1970; Hauge, 1970
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
d 3Phi3  [473.2]   [0.2321]   [2.3E-7]  [2.082] d larrow a R 18519.90 Z
Barrow, Lee, et al., 1970; Hauge, 1970
d 3Phi2  [484.6]   [0.2322]   [1.9E-7]  [2.082] d larrow a R 18295.80 Z
Barrow, Lee, et al., 1970; Hauge, 1970
c2 3Delta2     [0.2191]   [1.9E-7]  [2.146] c2 larrow a2 R 13597.27 Z
Barrow, Bastin, et al., 1967; Barrow, Lee, et al., 1970
c1 3Delta1     [0.2189]   [2.0E-7]  [2.147] c1 larrow a1 R 13567.00 Z
Barrow, Bastin, et al., 1967; Barrow, Lee, et al., 1970
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
b2 3Delta2     [0.2216]   [2.9E-7]  [2.133] b2 larrow a2 R 13316.35 Z
Barrow, Lee, et al., 1970
a3 3Delta3 1 [537]   [0.23875]   [1.87E-7]  2.0548  
a2 3Delta2 1 [537.65]   0.23902 0.00121  [1.88E-7]  2.0548  
a1 3Delta1 1 [537.14]   0.23831 0.00120  [1.79E-7]  2.0548  
E 1Sigma+  [(421)]   [0.229] 2     [2.10] E larrow X R 22574.22 H
Barrow, Lee, et al., 1970
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
D 1Sigma+     [0.242] 2     [2.04] D larrow X R 22485.35 H
Barrow, Lee, et al., 1970
C 1Pi  [549]   [0.23745] 3   [1.65E-7]  [2.0611] C larrow X R 20959.83 Z
Barrow, Lee, et al., 1970; Hauge, 1970
B 1Pi  [474]   [0.22936] 3   [2.7E-7]  [2.0971] B larrow X R 16184.00 Z
Barrow, Lee, et al., 1970; Hauge, 1970
A 1Sigma+  [489.4] Z   0.2278 0.0011  [2.1E-7]  2.104 A larrow X R 11661.9 Z
Barrow, Bastin, et al., 1967; Barrow, Lee, et al., 1970
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
X 1Sigma+ 0 1 [570]   [0.24562]   [1.78E-7]  [2.0265]  

Notes

1Not certain whether X 1Sigma or a 3Delta the ground state.
2Strong interaction between the two 1Sigma states.
3Lambda-type doubling.

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.

Shenyavskaya, Gurvich, et al., 1968
Shenyavskaya, E.A.; Gurvich, L.V.; Maltsev, A.A., On a band system in the discharge spectrum in lanthanum trifluorode vapors, Opt. Spectrosc. Engl. Transl., 1968, 24, 556, In original 1025. [all data]

Shenyavskaya, Gurvich, et al., 1965
Shenyavskaya, E.A.; Gurvich, L.V.; Maltsev, A.A., Electron spectra of the LaF molecule, Vestn. Mosk. Univ., 1965, 20, 10. [all data]

Barrow, Lee, et al., 1970
Barrow; Lee; Partridge, Unpublished quoted in Rosen, 1970 cited in Huber and Herzberg, 1979, 1970, 371. [all data]

Hauge, 1970
Hauge, Unpublished quoted in Rosen, 1970 cited in Huber and Herzberg, 1979, 1970, 371. [all data]

Barrow, Bastin, et al., 1967
Barrow, R.F.; Bastin, M.W.; Moore, D.L.G.; Pott, C.J., Electronic states of gaseous fluorides of scandium, yttrium and lanthanum, Nature (London), 1967, 215, 1072. [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]

Huber and Herzberg, 1979
Huber, K.P.; Herzberg, G., Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules, Van Nostrand Reinhold Company, New York, 1979, 716. [all data]


Notes

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