Dimorphic LaPdSn and ErAgSn - A first principles study
Langue
en
Article de revue
Ce document a été publié dans
Intermetallics. 2012, vol. 20, n° 1, p. 33-38
Elsevier
Résumé en anglais
The stannides LaPdSn (orthorhombic TiNiSi type, Pnma) and ErAgSn (hexagonal NdPtSb type, P63mc) both transform to ZrNiAl type (P--62m) high-pressure phases with different transition metal-tin ordering. The electronic ...Lire la suite >
The stannides LaPdSn (orthorhombic TiNiSi type, Pnma) and ErAgSn (hexagonal NdPtSb type, P63mc) both transform to ZrNiAl type (P--62m) high-pressure phases with different transition metal-tin ordering. The electronic structure and the chemical bonding of all four modifications have been studied by quantum theoretical DFT methodologies. Geometry optimizations are in good agreement with the experimentally determined structures. Strongest bonding interactions were observed for Pd-Sn (LaPdSn) and Er-Sn (ErAgSn). These findings result from different site occupancies and the chemical natures and electronegativities of the interacting species forming the prevailing chemical bonds in the NP/HP varieties of the two compounds.< Réduire
Mots clés en anglais
Rare earth intermetallics
Electronic structure of metals and alloys
Ab initio calculations
Electronic structure
calculations
Origine
Importé de halUnités de recherche