barium oxide, obtained by calcining witherite
- Formula: BaO
- Molecular weight: 153.326
- IUPAC Standard InChI: InChI=1S/Ba.O
- IUPAC Standard InChIKey: QVQLCTNNEUAWMS-UHFFFAOYSA-N
- CAS Registry Number: 1304-28-5
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: barium oxide; Barium monoxide
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Gas phase ion energetics data
Go To: Top, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias
Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
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
View reactions leading to BaO+ (ion structure unspecified)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| IE (evaluated) | 6.46 ± 0.07 | eV | N/A | N/A | L |
| Quantity | Value | Units | Method | Reference | Comment |
| Proton affinity (review) | 290.49 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
| Quantity | Value | Units | Method | Reference | Comment |
| Gas basicity | 283.84 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 6.91 | EI | Koitabashi, 1994 | LL |
| 6.5 ± 0.15 | EVAL | Belyaev, Gotkis, et al., 1990 | LL |
| 6.46 ± 0.07 | PE | Dyke, Feher, et al., 1987 | LBLHLM |
| 6.8 ± 0.2 | EI | Murad, 1981 | LLK |
| 6.9 ± 0.1 | EI | Rauh and Ackermann, 1976 | LLK |
| 6.5 ± 0.2 | EI | Hilpert, Naoumidis, et al., 1975 | LLK |
| 7. ± 1. | EI | Farber and Srivastava, 1975 | LLK |
| 6.97 ± 0.12 | EI | Panchenkov, Gusarov, et al., 1973 | LLK |
| 6.8 ± 0.5 | EI | Pupp, Yamdagni, et al., 1969 | RDSH |
| 6.5 ± 0.3 | EI | Mesnard, Uzan, et al., 1963 | RDSH |
| 6.89 ± 0.03 | PE | Dyke, Feher, et al., 1987 | Vertical value; LBLHLM |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| Ba+ | ~11. | O | EI | Koitabashi, 1994 | LL |
| Ba+ | 10.95 ± 0.18 | O | EI | Panchenkov, Gusarov, et al., 1973 | LLK |
| Ba+ | 13.7 ± 0.5 | O | EI | Mesnard, Uzan, et al., 1966 | RDSH |
| Ba+ | 13.2 ± 0.2 | O | EI | Mesnard, Uzan, et al., 1963 | RDSH |
References
Go To: Top, 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.
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018
. [all data]
Koitabashi, 1994
Koitabashi, M.,
Mass spectrum of barium oxide vapor,
Jpn. J. Appl. Phys., 1994, 33, 5995. [all data]
Belyaev, Gotkis, et al., 1990
Belyaev, V.N.; Gotkis, I.S.; Lebedeva, N.L.; Krasnov, K.S.,
Ionization potentials of MX molecules (M = Ca, Sr, Ba; X = F, Cl, Br, I, OH, O),
Russ. J. Phys. Chem., 1990, 64, 773. [all data]
Dyke, Feher, et al., 1987
Dyke, J.M.; Feher, M.; Gravenor, B.W.J.; Morris, A.,
High-temperature photoelectron spectroscopy: A study of the alkaline earth oxides SrO and BaO,
J. Phys. Chem., 1987, 91, 4476. [all data]
Murad, 1981
Murad, E.,
Thermochemical properties of the gaseous alkaline earth monohydroxides,
J. Chem. Phys., 1981, 75, 4080. [all data]
Rauh and Ackermann, 1976
Rauh, E.G.; Ackermann, R.J.,
Erratum: First ionization potentials of some refractory oxide vapors,
J. Chem. Phys., 1976, 64, 1862. [all data]
Hilpert, Naoumidis, et al., 1975
Hilpert, K.; Naoumidis, A.; Wolff, G.,
Mass spectrometric study of the evaporation of BaAl2O4,
High Temp. Sci., 1975, 7, 1. [all data]
Farber and Srivastava, 1975
Farber, M.; Srivastava, R.D.,
The dissociation energy of barium oxide,
High Temp. Sci., 1975, 7, 74. [all data]
Panchenkov, Gusarov, et al., 1973
Panchenkov, I.G.; Gusarov, A.V.; Gorokhov, L.N.,
Dissociation energy of the barium oxide molecule,
Russ. J. Phys. Chem., 1973, 47, 55. [all data]
Pupp, Yamdagni, et al., 1969
Pupp, C.; Yamdagni, R.; Porter, R.F.,
Mass spectrometric study of the evaporation of BaMoO4 and BaWO4,
J. Inorg. Nucl. Chem., 1969, 31, 2021. [all data]
Mesnard, Uzan, et al., 1963
Mesnard, G.; Uzan, R.; Cabaud, B.,
Potentiels d'apparition des ions obtenus dans un spectrometre de masse a partir d'oxydes alcalino-terreux,
Cahiers Phys., 1963, 17, 333. [all data]
Mesnard, Uzan, et al., 1966
Mesnard, G.; Uzan, R.; Cabaud, B.,
Etude au spectrometre de masse des produits d'evaporation du bioxyde de titane et du titanate de baryum,
Rev. Phys. Appl., 1966, 1, 123. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy IE (evaluated) Recommended ionization energy - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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