Materials in nature and the universe are inherently heterogeneous, and the chemical states and distribution of functional groups of carbon and the valence states of iron contained within them are important sources of information for estimating the temperature, pressure, and other environmental conditions to which the materials have been exposed. At the same time, these factors strongly influence the properties of the materials themselves.
In this study, we focus on extraterrestrial materials such as carbonaceous chondrite meteorites, as well as industrial materials derived from mined resources such as coal and sintered ore. By visualizing their elemental compositions, chemical states, and spatial distributions, we aim to clarify the formation and transformation histories of these materials and to provide guidelines for understanding and evaluating their material properties.
YAMASHITA Shohei, KIMURA Masao, YOSHIDA Kazuki, KIDO Daiki, UY Allam Mayrene
TAKAHASHI Yoshio (The University of Tokyo)
KEBUKAWA Yoko (YOKOHAMA National University)
SEKINE Yasuhito (Tokyo Institute of Technology)
TAKEICHI Yasuo (Osaka University)
X-ray microscopy (XAFS-CT, STXM, XAS/XRX/XRD, X-CT), XAFS, XRD, Neutron imaging, Muon characteristic X-ray analysis
Visualization of chemical state distribution of (a) coke, (b) iron sintered ore (Ca-Fe-Si-O), and (c-e) Zag meteorite using XAFS-CT and STXM
