Magnesium iodide

Formula: IMg
Molecular weight: 151.2095
CAS Registry Number: 14332-62-8
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Other data available:
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Constants of diatomic molecules

Data compiled by: Klaus P. Huber and Gerhard H. Herzberg

Data collected through March, 1977

Symbols used in the table of constants
Symbol	Meaning
State	electronic state and / or symmetry symbol
T_e	minimum electronic energy (cm^-1)
ω_e	vibrational constant – first term (cm^-1)
ω_ex_e	vibrational constant – second term (cm^-1)
ω_ey_e	vibrational constant – third term (cm^-1)
B_e	rotational constant in equilibrium position (cm^-1)
α_e	rotational constant – first term (cm^-1)
γ_e	rotation-vibration interaction constant (cm^-1)
D_e	centrifugal distortion constant (cm^-1)
β_e	rotational constant – first term, centrifugal force (cm^-1)
r_e	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
State	T_e	ω_e	ω_ex_e	ω_ey_e	B_e	α_e	γ_e	D_e	β_e	r_e	Trans.	ν₀₀
D	26680	295 H	0.5								D → X	26670 H
D	↳Puri and Mohan, 1975
C	26099	270 H	0.72								C → X	26076 H
C	↳Puri and Mohan, 1975
B	25612	295 H									B ↔ X R	25602 H
B	↳Morgan, 1936; Puri and Mohan, 1975
A	24319	323 H	1.0								A ↔ X V	24322 H
A	↳Morgan, 1936; Puri and Mohan, 1975
State	T_e	ω_e	ω_ex_e	ω_ey_e	B_e	α_e	γ_e	D_e	β_e	r_e	Trans.	ν₀₀
X (²Σ)	0	316 H	0.50

Notes

From 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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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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Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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