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Lithium, compound with rubidium (1:1)

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 January, 1977

Symbols used in the table of constants
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 (7)Li(85)Rb
B (17552) (81) H 1         B larrow X 2 17500 H
Walter and Barratt, 1928; Weizel and Kulp, 1930
X 1Sigma+ 0 (185) H 3          
Dagdigian and Wharton, 1972


1Fragment 4
2Dipole moment of 7Li85Rb: muel(v=0) = 4.00 D Dagdigian and Wharton, 1972, calculated Dagdigian and Wharton, 1972 with B0 = 0.2l8 Dagdigian and Wharton, 1972 estimated from Badger's rule [see, however, Cavaliere, Ferrante, et al., 1975]. Quadrupole coupling constants Dagdigian and Wharton, 1972.
3Mol. beam re el. reson. 2
4Only five bands, four of which have Deltav=0.


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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Walter and Barratt, 1928
Walter, J.M.; Barratt, S., The existence of intermetallic compounds in the vapour state. The spectra of the alkali metals, and of their alloys with each other, Proc. R. Soc. London A, 1928, 119, 257. [all data]

Weizel and Kulp, 1930
Weizel, W.; Kulp, M., Uber die bandensysteme der alkalidampfe, Ann. Phys. (Leipzig), 1930, 4, 971. [all data]

Dagdigian and Wharton, 1972
Dagdigian, P.J.; Wharton, L., Molecular beam electric deflection and resonance spectroscopy of the heteronuclear alkali dimers: 39K7Li, Rb7Li, 39K23Na, Rb23Na, and 133Cs23Na, J. Chem. Phys., 1972, 57, 1487. [all data]

Cavaliere, Ferrante, et al., 1975
Cavaliere, P.; Ferrante, G.; Lo Cascio, L., Interpolated values of spectroscopic constants of asymmetric alkali molecules and molecular ions, J. Chem. Phys., 1975, 62, 4753. [all data]


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