Lanthanum monofluoride
- Formula: FLa
- Molecular weight: 157.90387
- CAS Registry Number: 13943-44-7
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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
Symbol | Meaning |
---|---|
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) |
State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Emission | Emission 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 | ||||||||||||
State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | 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 | ||||||||||||
State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | 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 | ||||||||||||
State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | 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 | ||||||||||||
State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | 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 | ||||||||||||
State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
X 1Σ+ | 0 1 | [570] | [0.24562] | [1.78E-7] | [2.0265] |
Notes
1 | Not certain whether X 1Σ or a 3Δ the ground state. |
2 | Strong interaction between the two 1Σ states. |
3 | Λ-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
Go To: Top, Constants of diatomic molecules, References
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