International Tables for Crystallography

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X-ray absorption spectroscopy under extreme conditions of pressure
Jean-Paul Itié and Sakura Pascarelli. International Tables for Crystallography (2022). Vol. I [ doi:10.1107/S1574870720004693 ]

Abstract

X-ray absorption spectroscopy (XAS) has successfully been applied in high-pressure research for over 40 years. The main strengths of XAS make this technique highly complementary to the more commonly used diffraction-based methods. Its strong sensitivity to local structure makes it a powerful probe of pressure-induced changes in disordered matter (liquids and amorphous solids) and of distorted or complex ordered solids where the local structure differs from the average structure. Its element selectivity allows pressure effects on dilute species to be studied, and its high sensitivity to symmetry and charge around the absorbing atom is an asset when phase transitions modify speciation or valence. Developments in the coming years will include 3D hyperspectral mapping on the nanoscale in the diamond anvil cell, and time-resolved studies of chemical reactions and phase-transition kinetics induced by dynamic compression methods.


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About International Tables for Crystallography

International Tables for Crystallography is the definitive resource and reference work for crystallography. The multi-volume series comprises articles and tables of data relevant to crystallographic research and to applications of crystallographic methods in all sciences concerned with the structure and properties of materials.