Open AccessDevelopment of micro‐XANES mapping in the diamond anvil cell
Author(s) -
Aquilanti Giuliana,
Pascarelli Sakura,
Mathon Olivier,
Muñoz Manuel,
Narygina Olga,
Dubrovinsky Leonid
Publication year - 2009
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s0909049509007134
Subject(s) - xanes , diamond anvil cell , x ray absorption spectroscopy , materials science , spinel , beamline , extended x ray absorption fine structure , analytical chemistry (journal) , diamond , absorption (acoustics) , spectroscopy , absorption spectroscopy , optics , diffraction , chemistry , metallurgy , physics , beam (structure) , chromatography , quantum mechanics , composite material
Energy‐dispersive X‐ray absorption spectroscopy is now a well established method that has been applied to a broad range of applications. At the energy‐dispersive EXAFS beamline of the ESRF, ID24, the recently achieved 5 × 5 µm focal spot combined with fast acquisition has allowed complex and non‐uniform samples to be mapped and images to be obtained where each pixel contains full XAS information. This method has been applied to a study under extreme conditions of pressure and temperature in a diamond anvil cell in transmission mode. The case study was the investigation of the Fe K ‐edge XANES of (Mg,Fe)SiO 3 ‐perovskite and (Mg,Fe)O‐ferropericlase on decomposition of the spinel‐structured olivine [γ‐(Mg,Fe) 2 SiO 4 ] at 78 (3) GPa after laser heating at 2200 (100) K.