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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
Deltafgas24.61kJ/molReviewChase, 1998Data last reviewed in December, 1974
Quantity Value Units Method Reference Comment
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. - 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

Go To: Top, Gas phase 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: 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
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
D 26680 295 H 0.5        D rarrow X 26670 H
Puri and Mohan, 1975
C 26099 270 H 0.72        C rarrow X 26076 H
Puri and Mohan, 1975
B 25612 295 H         B lrarrow X R 25602 H
Morgan, 1936; Puri and Mohan, 1975
A 24319 323 H 1.0        A lrarrow X V 24322 H
Morgan, 1936; Puri and Mohan, 1975
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
X (2Sigma) 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

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics 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]

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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