Magnesium 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
ΔfH°gas24.61kJ/molReviewChase, 1998Data last reviewed in December, 1974
Quantity Value Units Method Reference Comment
S°gas,1 bar252.65J/mol*KReviewChase, 1998Data last reviewed in December, 1974

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) 298. to 6000.
A 37.25894
B 0.807232
C -0.132263
D 0.023192
E -0.117130
F 13.07751
G 296.8406
H 24.61401
ReferenceChase, 1998
Comment Data last reviewed in December, 1974

Gas phase ion energetics 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: John E. Bartmess

View reactions leading to IMg+ (ion structure unspecified)

Electron affinity determinations

EA (eV) Method Reference Comment
1.900 ± 0.040LPESMiller and Lineberger, 1988 

Constants of diatomic molecules

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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: Klaus P. Huber and Gerhard H. Herzberg

Data collected through March, 1977

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 (24)Mg127I
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
D 26680 295 H 0.5        D → X 26670 H
↳Puri and Mohan, 1975
C 26099 270 H 0.72        C → X 26076 H
↳Puri and Mohan, 1975
B 25612 295 H         B ↔ X R 25602 H
↳Morgan, 1936; Puri and Mohan, 1975
A 24319 323 H 1.0        A ↔ X V 24322 H
↳Morgan, 1936; Puri and Mohan, 1975
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
X (2Σ) 0 316 H 0.50         

Notes

1From an ill-defined threshold for dissociation photoionization, and from the heat of atomization of MgI2; using an assumed value for the ionization potential of MgI Berkowitz and Chupka, 1966.

References

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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]

Miller and Lineberger, 1988
Miller, T.M.; Lineberger, W.C., Electron Affinity of Magnesium Chloride, Chem. Phys. Lett., 1988, 146, 5, 364, https://doi.org/10.1016/0009-2614(88)87460-8 . [all data]

Puri and Mohan, 1975
Puri, S.N.; Mohan, H., Thermal emission spectrum of MgI, Pramana, 1975, 4, 171. [all data]

Morgan, 1936
Morgan, F., Band spectra of MgCl, MgBr and MgI in absorption, Phys. Rev., 1936, 50, 603. [all data]

Berkowitz and Chupka, 1966
Berkowitz, J.; Chupka, W.A., Photoionization of high-temperature vapors. I. The iodides of sodium, magnesium, and thallium, J. Chem. Phys., 1966, 45, 1287. [all data]

Notes

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