Electronic Structure and Bonding Characteristic of LaMgNi4H4
We performed first-principles calculations to the electronic structure and bonding characteristic of LaMgNi4H4. The calculation results show that the H—Ni units are formed by the covalent H—Ni bonds, the surrounding Mg and La atoms provide electrons to the H—Ni units, and the Ni-Ni bonds between the different H—Ni units are covalent, making the H—Ni units not isolated. These bonding characteristics show that LaMgNi4H4 is similar with interstitial metal hydride in some aspects, and similar with complex metal hydrides in other aspects, indicating LaMgNi4H4 is the intermediate between interstitial metal hydrides and complex metal hydrides.
Guojun Zhang and Jessica Xu
B. J. Wang and L. J. Zhu, "Electronic Structure and Bonding Characteristic of LaMgNi4H4", Advanced Materials Research, Vols. 160-162, pp. 876-879, 2011