In situ X-ray diffractometry study of the hydride in the intermetallic compound Mg2Ni
- 1 March 1981
- journal article
- Published by IOP Publishing in Journal of Physics F: Metal Physics
- Vol. 11 (3), 521-529
- https://doi.org/10.1088/0305-4608/11/3/002
Abstract
The crystal symmetry of the reaction product of hydrogen with the intermetallic compound Mg2Ni has been determined to be tetragonal with unit cell dimensions: a=6.533 AA and c=7.499 AA, by in situ X-ray diffractometry at about 623K and under 4.6 MPa hydrogen pressure. The resultant hydride phase transforms at 503K to an orthorhombic structure with lattice dimensions: a=11.394 AA, b=11.196 AA and c=9.165 AA. This phase transition is of polymorphic type as is evident from the well defined exothermic (endothermic) peak in the pressure-differential scanning calorimetry curves obtained during cooling (heating) after the formation of the nearest stoichiometric hydride Mg2NiH4. The results are briefly compared with previously reported data.Keywords
This publication has 6 references indexed in Scilit:
- The reaction of hydrogen with magnesium alloys and magnesium intermetallic compoundsJournal of the Less Common Metals, 1980
- New structure results for hydrides and deuterides of the hydrogen storage material Mg2NiJournal of the Less Common Metals, 1980
- Allotropic transitions of magnesium nickel hydride (Mg2NiH4)Inorganic Chemistry, 1979
- The formation and dissociation of magnesium alloy hydrides and their use for fuel storage in the hydrogen carMetallurgical Transactions A, 1975
- Reaction of hydrogen with alloys of magnesium and nickel and the formation of Mg2NiH4Inorganic Chemistry, 1968
- Reaction of hydrogen with alloys of magnesium and copperInorganic Chemistry, 1967