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rubidium fluoride

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Phase change data

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

Antoine Equation Parameters

log10(P) = A − (B / (T + C))
    P = vapor pressure (atm)
    T = temperature (K)

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Temperature (K) A B C Reference Comment
1194. - 1681.2.301072037.669-800.754Stull, 1947Coefficents calculated by NIST from author's data.

Constants of diatomic molecules

Go To: Top, Phase change 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 July, 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 85Rb19F
Continuous absorption with maximum at 46500 cm-1. 1
Caunt and Barrow, 1949; Barrow and Caunt, 1953
A 2           A larrow X 
Caunt and Barrow, 1949; Barrow and Caunt, 1953
X 1Sigma+ 0 376 3 (1.9)  0.21066401 0.00152279 4 3.30E-6 2.6839E-7 5 -3.7E-10 2.270333 6  
Baikov and Vasilevskii, 1967
SCF-LCAO-MO calculations Matcha, 1970
Rotation sp.
Lew, Morris, et al., 1958; Veazey and Gordy, 1965
Mol. beam rf electric 7 8
Hughes and Grabner, 1950; Zorn, English, et al., 1966; Bonczyk and Hughes, 1967
and magn. reson. 9 8
Bolef and Zeiger, 1952; Mehran, Brooks, et al., 1966


1The electron energy loss spectrum has peaks at 4.9, 8.2, 9.4, 14.8, 18.4, 19.7, 21.0 eV Geiger and Pfeiffer, 1968.
2Diffuse absorption bands 33500 - 42300 cm-1.
3From the IR spectrum Baikov and Vasilevskii, 1967; good agreement with omegae = 373.27 Veazey and Gordy, 1965 and omegaexe = 1.80 Veazey and Gordy, 1965 as calculated from the rotational constants Veazey and Gordy, 1965.
4 Lew, Morris, et al., 1958 and Veazey and Gordy, 1965 give constants for 87RbF.
5 Veazey and Gordy, 1965.
6Rot.-vibr. b.
7muel[D] = 8.5131 + 0.06650(v+1/2) + 0.00026(v+1/2)2, v = 0,1,2 Graff, Schonwasser, et al., 1967, Hebert, Lovas, et al., 1968; eqQ(85Rb)[MHz) = -70.739 + 0.7975(v+1/2) - 0.0053(v+1/2)2, v=0...4 Zorn, English, et al., 1966, Bonczyk and Hughes, 1967, Graff, Schonwasser, et al., 1967.
8 Heitbaum and Schonwasser, 1972 give constants for 87RbF (eqQ, muel, gJ, etc.).
9gJ = (-)0.0441 muN Mehran, Brooks, et al., 1966; somewhat different values by Graff, Schonwasser, et al., 1967 for v=0 (-0.05470) and v=1 (-0.05455).
10Thermochemical value Brewer and Brackett, 1961; flame photometry gives 5.2 eV Bulewicz, Phillips, et al., 1961.


Go To: Top, Phase change 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.

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Caunt and Barrow, 1949
Caunt, A.D.; Barrow, R.F., Ultra-violet absorption spectra of rubidium and caesium fluorides and the heat of dissociation of fluorine, Nature (London), 1949, 164, 753. [all data]

Barrow and Caunt, 1953
Barrow, R.F.; Caunt, A.D., The ultra-violet absorption spectra of some gaseous alkali-metal halides and the dissociation energy of fluorine, Proc. R. Soc. London A, 1953, 219, 120. [all data]

Baikov and Vasilevskii, 1967
Baikov, V.I.; Vasilevskii, K.P., Infrared spectra of sodium, potassium, rubidium, and cesium fluoride vapors, Opt. Spectrosc. Engl. Transl., 1967, 22, 198, In original 364. [all data]

Matcha, 1970
Matcha, R.L., Theoretical analysis of the electronic structure and molecular properties of the alkali halides. VI. Rubidium fluoride and sodium bromide, J. Chem. Phys., 1970, 53, 4490-4496. [all data]

Lew, Morris, et al., 1958
Lew, H.; Morris, D.; Geiger, F.E., Jr.; Eisinger, J.T., Rotational spectra of RbF by the electric resonance method, Can. J. Phys., 1958, 36, 171. [all data]

Veazey and Gordy, 1965
Veazey, S.E.; Gordy, W., Millimeter-wave molecular-beam spectroscopy: alkali fluorides, Phys. Rev. A: Gen. Phys., 1965, 138, 1303. [all data]

Hughes and Grabner, 1950
Hughes, V.; Grabner, L., The radiofrequency spectrum of Rb85F and Rb87F by the electric resonance method, Phys. Rev., 1950, 79, 314. [all data]

Zorn, English, et al., 1966
Zorn, J.C.; English, T.C.; Dickinson, J.T.; Stephenson, D.A., Molecular beam measurement of the hyperfine structure of 85Rb19F, J. Chem. Phys., 1966, 45, 3731. [all data]

Bonczyk and Hughes, 1967
Bonczyk, P.A.; Hughes, V.W., Hyperfine structure of the v=O, J=l state in Rb85F, Rb87F, K39F, and K41F by the molecular-beam electric-resonance method, Phys. Rev., 1967, 161, 15. [all data]

Bolef and Zeiger, 1952
Bolef, D.I.; Zeiger, H.J., Molecular beam magnetic resonance spectra of Rb87F and Rb87Cl at zero field, Phys. Rev., 1952, 85, 799. [all data]

Mehran, Brooks, et al., 1966
Mehran, F.; Brooks, R.A.; Ramsey, N.F., Rotational magnetic moments of alkali-halide molecules, Phys. Rev., 1966, 141, 93. [all data]

Geiger and Pfeiffer, 1968
Geiger, J.; Pfeiffer, H.-C., Untersuchung der Anregung innerer Elektronen von Alkalihalogenidmolekulen im Energieverlustspektrum von 25 keV-Elektronen, Z. Phys., 1968, 208, 105. [all data]

Graff, Schonwasser, et al., 1967
Graff, G.; Schonwasser, R.; Tonutti, M., Gleichzeitige Messung von Hyperfeinstruktur, Starkeffekt und Zeemaneffekt des 85Rb19F mit einer Molekulstrahl-Resonanzapparatur, Z. Phys., 1967, 199, 157. [all data]

Hebert, Lovas, et al., 1968
Hebert, A.J.; Lovas, F.J.; Melendres, C.A.; Hollowell, C.D.; Story, T.L., Jr.; Street, K., Jr., Dipole moments of some alkali halide molecules by the molecular beam electric resonance method, J. Chem. Phys., 1968, 48, 2824. [all data]

Heitbaum and Schonwasser, 1972
Heitbaum, J.; Schonwasser, R., Gleichzeitige Messung von Hyperfeinstruktur, Stark-Effekt und Zeeman-Effekt des 87RbF mit einer Molekulstrahl-Resonanzapparatur, Z. Naturforsch. A, 1972, 27, 92. [all data]

Brewer and Brackett, 1961
Brewer, L.; Brackett, E., The dissociation energies of gaseous alkali halides, Chem. Rev., 1961, 61, 425. [all data]

Bulewicz, Phillips, et al., 1961
Bulewicz, E.M.; Phillips, L.F.; Sugden, T.M., Determination of dissociation constants and heats of formation of simple molecules by flame photometry. Part 8. Stabilities of the gaseous diatomic halides of certain metals, Trans. Faraday Soc., 1961, 57, 921. [all data]


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