Hydrides magnesium

The hydrides of beryllium and magnesium are both largely covalent, magnesium hydride having a rutile (p. 36) structure, while beryllium hydride forms an electron-deficient chain structure. The bonding in these metal hydrides is not simple and requires an explanation which goes beyond the scope of this book. [Pg.127]

Magnesium Hydride. Magnesium hydride is a gray powder of about 97% purity which is insoluble in inert organic solvents. It is easily oxidized, and when heated to about 280°C, dissociates without melting when P is in kPa... [Pg.299]

When prepared by direct reaction of the elements, magnesium hydride is stable in air and only mildly reactive with water. [Pg.299]

D. A. Rohy, J. F. Nachman, A. N. Hammer, and T. E. Automotive Storage of Hydrogen Using Modfed Magnesium Hydrides, final report, U.S. [Pg.463]

Magnesium hydride formation RMgR + heat MgH2 + alkene... [Pg.340]

Lithium hydride is perhaps the most usehil of the other metal hydrides. The principal limitation is poor solubiUty, which essentially limits reaction media to such solvents as dioxane and dibutyl ether. Sodium hydride, which is too insoluble to function efficiently in solvents, is an effective reducing agent for the production of silane when dissolved in a LiCl—KCl eutectic at 348°C (63—65). Magnesium hydride has also been shown to be effective in the reduction of chloro- and fluorosilanes in solvent systems (66) and eutectic melts (67). [Pg.23]

Magnesium hydride (MgH2) Known to ignite Rapid... [Pg.232]

Sodium hydride ignites in oxygen at 230°C, and finely divided uranium hydride ignites on contact. Lithium hydride, sodium hydride and potassium hydride react slowly in dry air, while rubidium and caesium hydrides ignite. Reaction is accelerated in moist air, and even finely divided lithium hydride ignites then [1], Finely divided magnesium hydride, prepared by pyrolysis, ignites immediately in air [2], See also COMPLEX HYDRIDES... [Pg.1848]

In addition to the weight of the storage system, cost needs to be kept low. Magnesium hydride (MgH2) is inexpensive and has a potential storage capacity of 7.6 wt% H2. However,... [Pg.388]

Huot, J., G. Liang, S. Boily, A.V. Neste, and R. Schulz, Structural study and hydrogen sorption kinetics of ball-milled magnesium hydride, /. Alloys Compd., 293-295, 495-500, 1999. [Pg.406]

Magnesium forgings, 15 366 Magnesium halide, 15 385 Magnesium hydride, 13 612... [Pg.542]

Magnesium hydride, 4463 Magnesium-nickel hydride, 4464 Plutonium(III) hydride, 4509 Poly (germanium dihydride), 4415 Poly (germanium monohydride), 4413 Potassium hydride, 4427 Rubidium hydride, 4450 Sodium hydride, 4444 f Stibine, 4510 Thorium dihydride, 4489 Thorium hydride, 4540 Titanium dihydride, 4490 Titanium-zirconium hydride, 4491 Trigermane, 4421 Uranium(III) hydride, 4511 Uranium(TV) hydride, 4541... [Pg.240]

Fig. 7. Scanning electron micrographs of (a) magnesium hydride (MgH2) before milling and (b) nanocrystalline MgH2 - SDC lmol% composite after milling.

E. Wiberg, H. Goeltzer, R. Bauer, Z. Naturforsch, B. Teil 6 (1951) 394 cited after B. Bogdanovic, S-T. Liao, M. Schwickardi, P. Sikorsky, B. Spliethoff, Catalytic synthesis of magnesium hydride under mild conditions, Angew. Chem. Int. Ed. Engl. 19(10) (1980) 818-819. [Pg.78]

R.A. Vatin, T. Czujko, Z.S. Wronski, Particle size, grain size and g-MgH effects on the desorption properties of nanocrystalline commercial magnesium hydride processes by controlled mechanical milling, Nanotechnology 17 (2006) 3856-3865. [Pg.80]

T.R. Jensen, A. Andreasen, T. Vegge, J.W. Andreasen, K. Stahl, A.S. Pedersen, M.M. Nielsen, A.M. Molenbroek, F. Besebbacher, Dehydrogenation kinetics of pure and nickel-doped magnesium hydride investigated by in situ time - resolved powder X-ray diffraction, Int. J. Hyd. Ener. 31 (2006) 2052-2062. [Pg.82]

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