
pmid: 9993813
On calcule les structures des bandes des composes de type perovskites KMF 3 (M=Mn, Fe, Co, Ni, Cu et Zn) sur la base de la methode de liaison forte generalisee de Huckel. On presente les densites partielle et totale des etats. Comparaison avec les donnees experimentales disponibles. On met en evidence le role important des ions potassium dans les bandes de conduction. Discussion de ce role en rapport avec une approche par diffusion multiple au processus d'absorption RX
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