Dissociation Energies of the Alkaline Earth Monofluorides

Journal Article · Sat Aug 24 04:00:00 EDT 1963 · Nature (London)

DOI:https://doi.org/10.1038/199804a0· OSTI ID:4638178

BLUE, GARY D.; GREEN, JOHN W.; EHLERT, THOMAS C.; MARGRAVE, JOHN L.

New results and theoretical calculations are presented that indicate consistently high dissocintion energies for all the alkaline earth monofluorides. Experimental results were obtained by utilizing a mass spectrometer to analyze the vapors from a heated Ta Knudsen cell containing an alkaline earth fluoride salt with Al present as a reducing agent. Ionization efficiency curves were obtained and temperature dependence investigations were made to determine the molecular precursor of the ions observed. Values of the equilibrium constants at different temperatures were used together with the free-energy functions to calculate the third law heats of reaction at 298 deg K. Data are tabulated for the heats of various reactions for Al--MF2 systems with M = Mg, Ca, Sr, and Ba, and dissociation energies of MF molecules by various methods for Be, Mg, Ca, Sr, and Ba. (C.H.)

• Research Organization: Univ. of Wisconsin, Madison
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-035800
• OSTI ID: 4638178
• Journal Information: Nature (London), Journal Name: Nature (London) Journal Issue: 4895 Vol. 199; ISSN 0028-0836
• Publisher: Nature Publishing Group
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALKALINE EARTH METALS
ALUMINUM
BARIUM FLUORIDES
BERYLLIUM FLUORIDES
CALCIUM FLUORIDES
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
DIAGRAMS
EFFICIENCY
ELECTROLYTIC CELLS
FLUORIDES
IONIZATION
MAGNESIUM FLUORIDES
MASS SPECTROMETERS
MATHEMATICS
REDUCTION
SPECIFIC HEAT
STRONTIUM FLUORIDES
TEMPERATURE
THERMODYNAMICS