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
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
EmissionEmission spectra attributed to LaF: three systems of V shaded bands (P and Q heads)
νe = 30188.9, ω'e = 674.7, ω'ex'e = 2.35, ω"e = 603.8, ω"ex"e = 1.96
Shenyavskaya, Gurvich, et al., 1968
νe = 30076.4, ω'e = 682.4, ω'ex'e = 2.28, ω"e = 607.1, ω"ex"e = 1.88
Shenyavskaya, Gurvich, et al., 1965
νe = 28468, ω'e = 657, ω'ex'e = 1.1, ω"e = 607, ω"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
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
e 3Φ4     [0.2302]   [1.7E-7]  [2.098] e ← a R 22340.20 Z
Barrow, Lee, et al., 1970
e 3Φ3     [0.2294]   [2.0E-7]  [2.098] e ← a R 22149.20 Z
Barrow, Lee, et al., 1970
e 3Φ2     [0.2277]   [1.7E-7]  [2.098] e ← a R 21834.46 Z
Barrow, Lee, et al., 1970
d 3Φ4  [483]   [0.2336]   [2.2E-7]  [2.082] d ← a R 18809.40 Z
Barrow, Lee, et al., 1970; Hauge, 1970
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
d 3Φ3  [473.2]   [0.2321]   [2.3E-7]  [2.082] d ← a R 18519.90 Z
Barrow, Lee, et al., 1970; Hauge, 1970
d 3Φ2  [484.6]   [0.2322]   [1.9E-7]  [2.082] d ← a R 18295.80 Z
Barrow, Lee, et al., 1970; Hauge, 1970
c2 3Δ2     [0.2191]   [1.9E-7]  [2.146] c2 ← a2 R 13597.27 Z
Barrow, Bastin, et al., 1967; Barrow, Lee, et al., 1970
c1 3Δ1     [0.2189]   [2.0E-7]  [2.147] c1 ← a1 R 13567.00 Z
Barrow, Bastin, et al., 1967; Barrow, Lee, et al., 1970
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
b2 3Δ2     [0.2216]   [2.9E-7]  [2.133] b2 ← a2 R 13316.35 Z
Barrow, Lee, et al., 1970
a3 3Δ3 1 [537]   [0.23875]   [1.87E-7]  2.0548  
a2 3Δ2 1 [537.65]   0.23902 0.00121  [1.88E-7]  2.0548  
a1 3Δ1 1 [537.14]   0.23831 0.00120  [1.79E-7]  2.0548  
E 1Σ+  [(421)]   [0.229] 2     [2.10] E ← X R 22574.22 H
Barrow, Lee, et al., 1970
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
D 1Σ+     [0.242] 2     [2.04] D ← X R 22485.35 H
Barrow, Lee, et al., 1970
C 1Π  [549]   [0.23745] 3   [1.65E-7]  [2.0611] C ← X R 20959.83 Z
Barrow, Lee, et al., 1970; Hauge, 1970
B 1Π  [474]   [0.22936] 3   [2.7E-7]  [2.0971] B ← X R 16184.00 Z
Barrow, Lee, et al., 1970; Hauge, 1970
A 1Σ+  [489.4] Z   0.2278 0.0011  [2.1E-7]  2.104 A ← X R 11661.9 Z
Barrow, Bastin, et al., 1967; Barrow, Lee, et al., 1970
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
X 1Σ+ 0 1 [570]   [0.24562]   [1.78E-7]  [2.0265]  

Notes

1Not certain whether X 1Σ or a 3Δ the ground state.
2Strong interaction between the two 1Σ states.
3Λ-type doubling.

References

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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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