Zirconium iodide
- Formula: IZr
- Molecular weight: 218.128
- CAS Registry Number: 14728-76-8
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Gas phase thermochemistry data
Go To: Top, Constants of diatomic molecules, References, Notes
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 |
|---|---|---|---|---|---|
| ΔfH°gas | 141.30 | kcal/mol | Review | Chase, 1998 | Data last reviewed in September, 1964 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 65.918 | cal/mol*K | Review | Chase, 1998 | Data 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 |
| Reference | Chase, 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
| Symbol | Meaning |
|---|---|
| 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) |
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Groups of unclassified emission bands in the region 24800 - 26000 cm-1. | ||||||||||||
| ↳Sivaji and Rao, 1970 | ||||||||||||
| System B: 1 | R | 25416.6 H | ||||||||||
| ↳missing citation | ||||||||||||
| System B: | R | 25276.6 H | ||||||||||
| ↳missing citation | ||||||||||||
| R | 25117.2 H | |||||||||||
| ↳missing citation | ||||||||||||
| R | 24958.6 H | |||||||||||
| ↳missing citation | ||||||||||||
| State | Te | ωe | ωexe | ωeye | Be | αe | γe | De | βe | re | Trans. | ν00 |
| System C: 2 | R | 23564.8 H | ||||||||||
| ↳missing citation | ||||||||||||
| System C: | R | 23282.2 H | ||||||||||
| ↳missing citation | ||||||||||||
| R | 22995.4 H | |||||||||||
| ↳missing citation | ||||||||||||
| R | (22720) | |||||||||||
| ↳missing citation | ||||||||||||
Notes
| 1 | Four 0-0 sequences (ω'-ω" ~ -2) of line-like R shaded heads. |
| 2 | Four 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
Go To: Top, Gas phase thermochemistry data, Constants of diatomic molecules, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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