Zirconium iodide


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
Δfgas141.30kcal/molReviewChase, 1998Data last reviewed in September, 1964
Quantity Value Units Method Reference Comment
gas,1 bar65.918cal/mol*KReviewChase, 1998Data last reviewed in September, 1964

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 (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. to 6000.
A 8.938022
B 0.221773
C -0.001029
D 0.000088
E -0.015836
F 138.5720
G 76.58009
H 141.3000
ReferenceChase, 1998
Comment Data last reviewed in September, 1964

Constants of diatomic molecules

Go To: Top, Gas phase 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 compiled by: Klaus P. Huber and Gerhard H. Herzberg

Data collected through July, 1975

Symbols used in the table of constants
SymbolMeaning
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 (90)Zr127I
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
Groups of unclassified emission bands in the region 24800 - 26000 cm-1.
Sivaji and Rao, 1970
System B: 1           R 25416.6 H
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System B:           R 25276.6 H
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           R 25117.2 H
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           R 24958.6 H
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StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
System C: 2           R 23564.8 H
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System C:           R 23282.2 H
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           R 22995.4 H
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           R (22720)
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Notes

1Four 0-0 sequences (ω'-ω" ~ -2) of line-like R shaded heads.
2Four 0-0 sequences (ω'-ω" ~ +5) of line-like band heads. 4Π → 4Σ ?

References

Go To: Top, Gas phase thermochemistry 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.

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

Sivaji and Rao, 1970
Sivaji, Ch.; Rao, P.T., The band spectrum of ZrI, Proc. R. Ir. Acad. Sect. A:, 1970, 70, 7-11. [all data]


Notes

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