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Stability and electronic structure of the complex K$_2$PtCl$_6$ structure-type hydrides | | S.V. Halilov
; D.J. Singh
; M. Gupta
; R. Gupta
; | | Date: |
22 Jun 2004 | | Subject: | Materials Science | cond-mat.mtrl-sci | | Abstract: | The stability and bonding of the ternary complex K$_2$PtCl$_6$ structure hydrides is discussed using first principles density functional calculations. The cohesion is dominated by ionic contributions, but ligand field effects are important, and are responsible for the 18-electron rule. Similarities to oxides are discussed in terms of the electronic structure. However, phonon calculations for Sr$_2$RuH$_6$ also show differences, particularly in the polarizability of the RuH$_6$ octahedra. Nevertheless, the yet to be made compounds Pb$_2$RuH$_6$ and Be$_2$FeH$_6$ are possible ferroelectrics. The electronic structure and magnetic properties of the decomposition product, FeBe$_2$ are reported. Implications of the results for H storage are discussed. | | Source: | arXiv, cond-mat/0406506 | | Services: | Forum | Review | PDF | Favorites | |
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