Electronic Structure of α‐Quartz. A XANES Study of Empty States
Résumé
Abstract X‐ray absorption spectra of α‐quartz in the XANES region are presented both at oxygen and silicon K edges. The consequences of the electric dichroism of the samples on XANES structures are investigated. Polarization effects are detected when the electric field of the incident beam is parallel or perpendicular to the crystallographic c‐axis. The structures after the absorption edges are discussed both in the frame of the Natoli's rule and from a density of states point of view.