Cesium iodide
- Formula: CsI
- Molecular weight: 259.80992
- IUPAC Standard InChI: InChI=1S/Cs.HI/h;1H/q+1;/p-1
- IUPAC Standard InChIKey: XQPRBTXUXXVTKB-UHFFFAOYSA-M
- CAS Registry Number: 7789-17-5
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: caesium iodide
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Phase change data
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: William E. Acree, Jr., James S. Chickos
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔsubH° | 191.1 | kJ/mol | MS | Viswanathan and Hilpert, 2010 | See also Pankajavalli, Mallika, et al., 1998. |
| ΔsubH° | 195.6 | kJ/mol | GS | Pankajavalli, Mallika, et al., 1998 | |
| ΔsubH° | 193.1 | kJ/mol | T | Cordfunke, 1986 | See also Pankajavalli, Mallika, et al., 1998. |
| ΔsubH° | 193.1 | kJ/mol | T | Venugopal, Prasad, et al., 1985 | See also Pankajavalli, Mallika, et al., 1998. |
Gas phase ion energetics data
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 as indicated in comments:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess
Electron affinity determinations
| EA (eV) | Reference | Comment |
|---|---|---|
| 0.630 ± 0.040 | Miller, Leopold, et al., 1986 | Extrapolated by polarizability and radius from experimental data.; B |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 7.1 | PE | Benson, Novak, et al., 1987 | LBLHLM |
| 7.2 ± 0.2 | EI | Viswanathan and Hilpert, 1984 | LBLHLM |
| 6.7 ± 0.4 | EI | Emons, Horlbeck, et al., 1982 | LBLHLM |
| 7.1 ± 0.1 | PE | Potts and Price, 1977 | LLK |
| 6.5 ± 0.2 | PE | Smith and Pong, 1975 | LLK |
| 7.1 ± 0.1 | PE | Potts, Williams, et al., 1974 | LLK |
| 7.10 ± 0.05 | PE | Berkowitz, Dehmer, et al., 1973 | LLK |
| 7.25 ± 0.05 | PI | Berkowitz, 1969 | RDSH |
| 7.46 ± 0.05 | PE | Timoshenko and Akopyan, 1974 | Vertical value; LLK |
| 7.2 | PE | Goodman, Allen, et al., 1974 | Vertical value; LLK |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| Cs+ | 7.46 ± 0.05 | I | PI | Berkowitz, 1969 | RDSH |
| I+ | 14.1 ± 0.3 | Cs | EI | Platel, 1965 | RDSH |
| Cs+ | 17.60 ± 0.04 | I(-) | PE | Potts and Price, 1977 | Vertical value; LLK |
| Cs+ | 19.31 ± 0.04 | I(-) | PE | Potts and Price, 1977 | Vertical value; LLK |
References
Go To: Top, Phase change data, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Viswanathan and Hilpert, 2010
Viswanathan, R.; Hilpert, K.,
Mass Spectrometric Study of the Vaporization of Cesium Iodide and Thermochemistry of (CsI)2(g) and (CsI)3(g),
Berichte der Bunsengesellschaft für physikalische Chemie, 2010, 88, 2, 125-131, https://doi.org/10.1002/bbpc.19840880210
. [all data]
Pankajavalli, Mallika, et al., 1998
Pankajavalli, R.; Mallika, C.; Sreedharan, O.M.; Premila, M.; Gopalan, Padma,
Vapour pressure of C60 by a transpiration method using a horizontal thermobalance,
Thermochimica Acta, 1998, 316, 1, 101-108, https://doi.org/10.1016/S0040-6031(98)00304-9
. [all data]
Cordfunke, 1986
Cordfunke, E.H.P.,
Thermodynamic properties of CSI. II. vapour pressures and thermochemical properties of CsI(g) and Cs2I2(g),
Thermochimica Acta, 1986, 108, 45-55, https://doi.org/10.1016/0040-6031(86)85076-6
. [all data]
Venugopal, Prasad, et al., 1985
Venugopal, V.; Prasad, R.; Sood, D.D.,
Vaporisation thermodynamics of caesium iodide and caesium chromate,
Journal of Nuclear Materials, 1985, 130, 115-121, https://doi.org/10.1016/0022-3115(85)90300-9
. [all data]
Miller, Leopold, et al., 1986
Miller, T.M.; Leopold, D.G.; Murray, K.K.; Lineberger, W.C.,
Electron Affinities of the Alkali Halides and the Structure of their Negative Ions,
J. Chem. Phys., 1986, 85, 5, 2368, https://doi.org/10.1063/1.451091
. [all data]
Benson, Novak, et al., 1987
Benson, J.M.; Novak, I.; Potts, A.W.,
Photoelectron spectroscopy of the caesium halides using synchrotron radiation,
J. Phys. B:, 1987, 20, 6257. [all data]
Viswanathan and Hilpert, 1984
Viswanathan, R.; Hilpert, K.,
Mass spectrometric study of the vaporization of cesium iodide and thermochemistry of (CsI)2(g) and (CsI)3(g),
Ber. Bunsen-Ges. Phys. Chem., 1984, 88, 125. [all data]
Emons, Horlbeck, et al., 1982
Emons, H.-H.; Horlbeck, W.; Kiessling, D.,
Massenspektrometrische untersuchung der gasphase uber alkalimetalliodiden,
Z. Anorg. Allg. Chem., 1982, 488, 212. [all data]
Potts and Price, 1977
Potts, A.W.; Price, W.C.,
Photoelectron studies of ionic materials using molecular beam techniques,
Phys. Scr., 1977, 16, 191. [all data]
Smith and Pong, 1975
Smith, J.A.; Pong, W.,
Ultraviolet photoelectron spectra of cesium halides,
Phys. Rev. B:, 1975, 12, 5931. [all data]
Potts, Williams, et al., 1974
Potts, A.W.; Williams, T.A.; Price, W.C.,
Photoelectron spectra and electronic structure of diatomic alkali halides,
Proc. Roy. Soc. London A, 1974, 341, 147. [all data]
Berkowitz, Dehmer, et al., 1973
Berkowitz, J.; Dehmer, J.L.; Walker, T.E.H.,
PES of high-temperature vapors. IV. The cesium halides. Effect of spin-orbit interaction on the photoelectron and mass spectra of the alkali halides,
J. Chem. Phys., 1973, 59, 3645. [all data]
Berkowitz, 1969
Berkowitz, J.,
Photoionization of high-temperature vapors. V. Cesium halides; chemical shift of autoionization,
J. Chem. Phys., 1969, 50, 3503. [all data]
Timoshenko and Akopyan, 1974
Timoshenko, M.M.; Akopyan, M.E.,
Photoelectron spectra of cesium halides,
High Energy Chem., 1974, 8, 175, In original 211. [all data]
Goodman, Allen, et al., 1974
Goodman, T.D.; Allen, J.D., Jr.; Cusachs, L.C.; Schweitzer, G.K.,
The photoelectron spectra of gaseous alkali halides,
J. Electron Spectrosc. Relat. Phenom., 1974, 3, 289. [all data]
Platel, 1965
Platel, G.,
Mesures des potentials d'apparition des ions obtenus par impact electronique dans la phase vapeur des iodures alcalins et des melanges LiI-MI,
J. Chim. Phys., 1965, 62, 1176. [all data]
Notes
Go To: Top, Phase change data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy EA Electron affinity ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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