Bildung von Metallhydriden durch atomaren Wasserstoff

Hydride formation by atomic hydrogen reactions

“…charge; in view of the extremely low vapor pressure of T1C1 and T] at the temperature of the chloride surface (217°) volatile hydride formation was assumed. A similar experiment with thallium metal at 136.5°g ave the same result (55). The evidence presented in light of the known stability patterns of (T1H3)X and (T1II)X indicate that neither of these hydrides was formed.…”

“…The only other metal whose positive reaction with atomic hydrogen has been reported is tantalum. Pietseh and Lehl (55) found that finely ground tantalum reacted with atomic hydrogen to form a hydride; they observed the reaction by Xray diffraction techniques. It was further found that repulverization of the target, followed by further atomic hydrogen treatment, completely converted the sample.…”

Compounds of Hydrogen with Metals and Metalloids

“…A second and even more general synthesis of hydrides is a modification of the direct synthesis where the hydrogen is activated by a glow discharge. The reaction of atomic hydrogen with metals and compounds of metals has been studied extensively, and with the possible exception of cadmium, chromium, iron, mercury, palladium, tungsten, and zinc, hydrides of practically all the hydride-forming elements have been so prepared (26,27,28,29,30). The hydrides formed in some cases, although giving correct analyses, appear to be different from those prepared by other means; this is possibly due to polymerization or possibly due to the absence of metallic impurities.…”