论文部分内容阅读
In this study, synthetic C-S-H samples were investigated to reveal the feature at atomic scale.Rietveld refinement was applied to high resolution X-ray scattering data, yielding the lattice constants of the pseudo-crystal structure, as well as the crystallinity along three axes.Near Edge X-ray Absorption Fine Structure (NEXAFS) spectra was collected at calcium L3,2-edge.Evolution of calcium coordination symmetry were studied by investigating spectra characteristics.Pair Distribution Function (PDF) study yields the statistics of atom pair distribution.Coordination number of Ca and Si were obtained by integrating Radial distribution function.Atomic model based on dimeric structure were discussed and comnared with exnerimental data.