Mass-Spectrometric Study of the Magnesium Halides

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.1733377· OSTI ID:4741775

Berkowitz, J.; Marquart, J. R.

The vapor composition of four magnesium halides was studied by mass analyzing the vapor effusing from a Knudsen cell. In each instance, approximates 1% dimer and 0.01% trimer were observed. Heats of sublimation were measured by second- and third-law methods. The discrepancy between the two methods varied from 2 kcal/mole for MgI₂ to 5 kcal/mole for MgF₂, with the third-law method giving consistently lower values. The experimental heats of ionization of the monomers were in fair agreement with calculations based on an ionic model. The fragmentation pattern of the fluoride was anomalous as it was with the alkalihalide systems. The measured relative nonization cross sections were in surprisingly good agreement with the relative electric polarizabilities of the anions.

• Research Organization: Argonne National Lab., Ill.
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-004530
• OSTI ID: 4741775
• Report Number(s): TID-16025; 0021-9606
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 8 Vol. 37; ISSN JCPSA6; ISSN 0021-9606
• Publisher: American Institute of Physics (AIP)
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
EVAPORATION
MAGNESIUM FLUORIDES
MAGNESIUM IODIDES
MASS SPECTROMETERS
POLYMERS
SUBLIMATION HEAT
THERMODYNAMICS
VAPORS