Lanthanum monofluoride
- Formula: FLa
- Molecular weight: 157.90387
- CAS Registry Number: 13943-44-7
- Information on this page:
- Options:
Gas phase ion energetics data
Go To: Top, Constants of diatomic molecules, 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: Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
View reactions leading to FLa+ (ion structure unspecified)
Ionization energy determinations
IE (eV) | Method | Reference |
---|---|---|
6.3 ± 0.3 | EI | Zmbov and Margrave, 1968 |
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
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, 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.
Zmbov and Margrave, 1968
Zmbov, K.F.; Margrave, J.L.,
Mass spectrometric studies of scandium, yttrium, lanthanum, and rare-earth fluorides,
Advan. Chem. Ser., 1968, 72, 267. [all data]
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, Gas phase ion energetics data, Constants of diatomic molecules, References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.