calcium
- Formula: Ca
- Molecular weight: 40.078
- IUPAC Standard InChIKey: OYPRJOBELJOOCE-UHFFFAOYSA-N
- CAS Registry Number: 7440-70-2
- Chemical structure:
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- Other data available:
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Reaction thermochemistry 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: John E. Bartmess
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
(CAS Reg. No. 56977-48-1 • 4294967295) +
= CAS Reg. No. 56977-48-1
By formula: (CAS Reg. No. 56977-48-1 • 4294967295Ca) + Ca = CAS Reg. No. 56977-48-1
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 183. ± 6.3 | kJ/mol | N/A | Rackwitz, Feldman, et al., 1977 | gas phase |
Gas phase ion energetics data
Go To: Top, Reaction thermochemistry data, 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:
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
B - John E. Bartmess
View reactions leading to Ca+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 6.11316 ± 0.00002 | eV | N/A | N/A | L |
Electron affinity determinations
EA (eV) | Method | Reference | Comment |
---|---|---|---|
0.024546 ± 0.000087 | LPES | Petrunin, Andersen, et al., 1996 | B |
0.0184 ± 0.0025 | LPD | Walter and Peterson, 1992 | B |
0.0175 ± 0.0030 | EFD | Nadeau, Zhao, et al., 1992 | B |
0.0430 ± 0.0070 | LPD | Pegg, Thompson, et al., 1987 | B |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
6.11316 | EVAL | Lide, 1992 | LL |
6.0 ± 0.3 | EI | Lau and Hildenbrand, 1990 | LL |
6.11316 | S | Kelly, 1987 | LBLHLM |
6.11316 ± 0.00002 | S | Sugar and Corliss, 1985 | LBLHLM |
6.08 ± 0.06 | EI | Rauh and Ackermann, 1979 | LLK |
6.0 ± 0.3 | EI | Kleinschmidt and Hildenbrand, 1978 | LLK |
6.06 ± 0.05 | EI | Rauh and Ackermann, 1974 | LLK |
6.11316 ± 0.00002 | S | Brown, Tilford, et al., 1973 | LLK |
~6.1 | EI | Okudaira, 1970 | RDSH |
6.113 | S | Moore, 1970 | RDSH |
6.11313 | S | Risberg, 1968 | RDSH |
6.21 ± 0.09 | SI | Zinkiewicz, 1553 | RDSH |
References
Go To: Top, Reaction thermochemistry 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.
Rackwitz, Feldman, et al., 1977
Rackwitz, R.; Feldman, D.; Kaiser, H.J.; Heincke, E.,
Photodetachment bei einigen zweiatomigen negativen hydridionen: BeH-, MgH-, CaH-, ZnH-, PH-, AsH-,
Z. Naturforsch. A:, 1977, 32, 594. [all data]
Petrunin, Andersen, et al., 1996
Petrunin, V.V.; Andersen, H.H.; Balling, P.; Andersen, T.,
Structural Properties of the Negative Calcium Ion: Binding Energies and Fine-structure Splitting,
Phys. Rev. Lett., 1996, 76, 5, 744, https://doi.org/10.1103/PhysRevLett.76.744
. [all data]
Walter and Peterson, 1992
Walter, C.W.; Peterson, J.R.,
Shape Resonance in Ca- Photodetachment and the Electron Affinity of Ca(1S),
Phys. Rev. Lett., 1992, 68, 15, 2281, https://doi.org/10.1103/PhysRevLett.68.2281
. [all data]
Nadeau, Zhao, et al., 1992
Nadeau, M.J.; Zhao, X.L.; Garwan, M.A.; Litherland, A.E.,
Ca Negative-Ion Binding Energy,
Phys. Rev. A, 1992, 46, 7, R3588, https://doi.org/10.1103/PhysRevA.46.R3588
. [all data]
Pegg, Thompson, et al., 1987
Pegg, D.J.; Thompson, J.S.; Compton, R.N.; Alton, G.D.,
Evidence for a Stable Negative Ion of Calcium,
Phys. Rev. Lett., 1987, 59, 20, 2267, https://doi.org/10.1103/PhysRevLett.59.2267
. [all data]
Lide, 1992
Lide, D.R. (Editor),
Ionization potentials of atoms and atomic ions
in Handbook of Chem. and Phys., 1992, 10-211. [all data]
Lau and Hildenbrand, 1990
Lau, K.H.; Hildenbrand, D.L.,
High-temperature equilibrium studies of the gaseous thorium chlorides,
J. Chem. Phys., 1990, 92, 6124. [all data]
Kelly, 1987
Kelly, R.L.,
Atomic and ionic spectrum lines of hydrogen through kryton,
J. Phys. Chem. Ref. Data, 1987, 16. [all data]
Sugar and Corliss, 1985
Sugar, J.; Corliss, C.,
Atomic energy levels of the iron period elements: Potassium through nickel,
J. Phys. Chem. Ref. Data, 1985, 14. [all data]
Rauh and Ackermann, 1979
Rauh, E.G.; Ackermann, R.J.,
The first ionization potentials of the transition metals,
J. Chem. Phys., 1979, 70, 1004. [all data]
Kleinschmidt and Hildenbrand, 1978
Kleinschmidt, P.D.; Hildenbrand, D.L.,
Dissociation energies of CaI, SrI, and BaI from high temperature mass spectrometry,
J. Chem. Phys., 1978, 68, 2819. [all data]
Rauh and Ackermann, 1974
Rauh, E.G.; Ackermann, R.J.,
First ionization potentials of some refractory oxide vapors,
J. Chem. Phys., 1974, 60, 1396. [all data]
Brown, Tilford, et al., 1973
Brown, C.M.; Tilford, S.G.; Ginter, M.L.,
Absorption spectrum of Ca I in the 1580-2090A region,
J. Opt. Soc. Am., 1973, 63, 1454. [all data]
Okudaira, 1970
Okudaira, S.,
Multiple ionization of Ca, Sr and Ba by electron impact,
J. Phys. Soc. Jpn., 1970, 29, 409. [all data]
Moore, 1970
Moore, C.E.,
Ionization potentials and ionization limits derived from the analyses of optical spectra,
Natl. Stand. Ref. Data Ser., (U.S. Natl. Bur. Stand.), 1970, 34, 1. [all data]
Risberg, 1968
Risberg, G.,
The spectrum of atomic calcium, Ca I, and extensions to the analysis of Ca II,
Ark. Fys., 1968, 37, 231. [all data]
Zinkiewicz, 1553
Zinkiewicz, J.M.,
Determination of the ionization potential of Ca and Mg atoms by the surface ionization method using a mass spectrometer,
Proc. Colloq. Spectros. Intern., 14th Debrecen, Hung., 1967,, 1553, 3. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
EA Electron affinity IE (evaluated) Recommended ionization energy ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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