Accession Number:

AD0466510

Title:

PRELIMINARY REPORT ON THE THERMODYNAMIC PROPERTIES OF SELECTED LIGHT- ELEMENT AND SOME RELATED COMPOUNDS

Descriptive Note:

Semi-annual technical summary rept. no. 13

Corporate Author:

NATIONAL BUREAU OF STANDARDS GAITHERSBURG MD

Personal Author(s):

Report Date:

1965-01-01

Pagination or Media Count:

122.0

Abstract:

This is the thirteenth semiannual report on the current experimental, theoretical, and evaluative program, at the National Bureau of Standards, on the thermodynamic properties of selected light-element and some related compounds of primary interest in high-temperature research. Included are new experimental results in several areas and a number of tables of thermodynamic functions, heats of formation, ionization potentials, and electron affinities resulting from literature surveys and critical data evaluations. New experimental work on the borohydrides of aluminum and beryllium is reported. The mean value found for the standard heat of formation of AlBH43 298 K is 2 kcalmole for the gas and -5 kcalmole for the liquid, with an estimated possible error as great as 17 kcalmole. The infrared spectra of MgF2 in a krypton matrix, AlBH43, and BeBH42 were measured, and a new band system was discovered for F. The bending fundamental of MgF2 appears to be 242 reciprocal centimeters and continuing spectroscopic work is expected to provide additional molecular constants for the other substances.

Subject Categories:

  • Inorganic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE