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tantalum


Gas phase thermochemistry 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.

Quantity Value Units Method Reference Comment
Deltafgas781.99kJ/molReviewChase, 1998Data last reviewed in December, 1972
Quantity Value Units Method Reference Comment
gas,1 bar185.22J/mol*KReviewChase, 1998Data last reviewed in December, 1972

Gas Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 5778.07 - 6000.
A 29.53076
B 3.415195
C -0.565953
D 0.069701
E -4.928208
F 762.7725
G 207.6615
H 781.9896
ReferenceChase, 1998
Comment Data last reviewed in December, 1972

Condensed phase thermochemistry 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.

Quantity Value Units Method Reference Comment
Deltafliquid30.80kJ/molReviewChase, 1998Data last reviewed in December, 1972
Quantity Value Units Method Reference Comment
liquid,1 bar50.37J/mol*KReviewChase, 1998Data last reviewed in December, 1972
Quantity Value Units Method Reference Comment
solid41.48J/mol*KReviewChase, 1998Data last reviewed in December, 1972

Liquid Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 3258. - 5778.07
A 41.84000
B 2.444792×10-8
C -4.832814×10-9
D 3.272579×10-10
E 5.242719×10-8
F -6.182990
G 73.06226
H 30.79503
ReferenceChase, 1998
Comment Data last reviewed in December, 1972

Solid Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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View table.

Temperature (K) 298. - 1300.1300. - 3258.
A 20.69482-43.87133
B 17.2999273.02084
C -15.68987-27.40796
D 5.6086944.004682
E 0.06158126.30414
F -6.60344060.17512
G 62.3554125.70993
H 0.0000000.000000
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in December, 1972 Data last reviewed in December, 1972

Reaction thermochemistry 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.

Data compiled by: Michael M. Meot-Ner (Mautner) and Sharon G. Lias

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

(Ta+ bullet 2tantalum) + tantalum = (Ta+ bullet 3tantalum)

By formula: (Ta+ bullet 2Ta) + Ta = (Ta+ bullet 3Ta)

Enthalpy of reaction

DeltarH° (kJ/mol) T (K) Method Reference Comment
743.9 CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID

(Ta+ bullet tantalum) + tantalum = (Ta+ bullet 2tantalum)

By formula: (Ta+ bullet Ta) + Ta = (Ta+ bullet 2Ta)

Enthalpy of reaction

DeltarH° (kJ/mol) T (K) Method Reference Comment
643.9 CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID

Ta+ + tantalum = (Ta+ bullet tantalum)

By formula: Ta+ + Ta = (Ta+ bullet Ta)

Enthalpy of reaction

DeltarH° (kJ/mol) T (K) Method Reference Comment
666.1 CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Ion clustering 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
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 Ta+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)7.89eVN/AN/AL

Electron affinity determinations

EA (eV) Method Reference Comment
0.323 ± 0.012LPESFeigerle, Corderman, et al., 1981B

Ionization energy determinations

IE (eV) Method Reference Comment
7.89EVALLide, 1992LL
7.31 ± 0.09EIRauh and Ackermann, 1979LLK
7.89SMoore, 1970RDSH
7.89SMoore, 1970RDSH

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, 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: Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

Ta+ + tantalum = (Ta+ bullet tantalum)

By formula: Ta+ + Ta = (Ta+ bullet Ta)

Enthalpy of reaction

DeltarH° (kJ/mol) T (K) Method Reference Comment
666.1 CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID

(Ta+ bullet tantalum) + tantalum = (Ta+ bullet 2tantalum)

By formula: (Ta+ bullet Ta) + Ta = (Ta+ bullet 2Ta)

Enthalpy of reaction

DeltarH° (kJ/mol) T (K) Method Reference Comment
643.9 CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID

(Ta+ bullet 2tantalum) + tantalum = (Ta+ bullet 3tantalum)

By formula: (Ta+ bullet 2Ta) + Ta = (Ta+ bullet 3Ta)

Enthalpy of reaction

DeltarH° (kJ/mol) T (K) Method Reference Comment
743.9 CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, Notes

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

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Armentrout and Kickel, 1994
Armentrout, P.B.; Kickel, B.L., Gas Phase Thermochemistry of Transition Metal Ligand Systems: Reassessment of Values and Periodic Trends, in Organometallic Ion Chemistry, B. S. Freiser, ed, 1994. [all data]

Feigerle, Corderman, et al., 1981
Feigerle, C.S.; Corderman, R.R.; Bobashev, S.V.; Lineberger, W.C., Binding Energies and Structure of Transition Metal Negative Ions, J. Chem. Phys., 1981, 74, 3, 1580, https://doi.org/10.1063/1.441289 . [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]

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]

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]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, References