Characterization of composition and structure of clay minerals in sandstone with ptychographic X-ray nanotomography

摘要: Abstract Three-dimensional analysis of microporous and fine-grained particles in natural stone is important for understanding their internal fluid flow processes to allow dynamics be modeled. These are great interest oil, gas groundwater studies, as well the weathering building materials. For features above 1 μm methods such X-ray micro-computed tomography (μ-CT) can provide non-destructive, quantitative analysis. Non-destructive 3D imaging at resolutions below 300–400 nm, however, has remained a challenge until recent developments synchrotron beam lines. In this paper we visualize microstructure clay mineral samples extracted from two different sandstones spatial down 45 nm, using ptychographic computed (PXCT). Furthermore, relative humidity environment during these experiments was controlled order assess its influence on analyzed samples. Based high-quality images, were able acquire non-destructively information content distribution, porosity connectivity clusters inside sandstone.