THE MAGNESIUM-HYDROGEN SYSTEM
The decomposition pressure of magnesium hydride was measured under conditions such that the precision and accuracy of the temperature and pressure measurements could be estimated and the composition of the solid phases determined. The diffusion of hydrogen through the walls of the apparatus and the solubility of hydrogen in the walls was considered. The apparatus and the method of making the measurements are described. The decomposition pressures were converted to fugacities hy use of the BeattieBridgeman equation of state for hydrogen and fitted to straight lines to give R ln f/sub H/sub 2/ = (-17,785 plus or minus 76)/T + 32.28 plus or minus 0.45 acd R ln f/sub D/sub 2/ = (- 17,480 plus or minus 110)/T + 32.48 plus or minus 0.17. Magnesium hydride, MgH/sub 2/, was found to be a stoichiometric compound within the limits of error of the measurements. The solubility of hydrogen in magnesium was found to increase from 2 atom% at 440 deg to 10 atom% at 560 deg . From these measurements thermodynamic functions for the formation of magnesium hydride and magnesium deuteride were estimated. (auth)
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of New Mexico, Albuquerque, NM (United States)
- NSA Number:
- NSA-14-021444
- OSTI ID:
- 4173455
- Journal Information:
- Journal of the American Chemical Society (U.S.), Vol. Vol: 82, Issue 14; Other Information: Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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