Extensity of C3S EBSD Database and Its Structure Calculation

Crystal morphology, crystal structure and atomic coordinates of tricalcium silicate （C3S，3CaO • SiO2）which is the main components of cement clinker were studied. Through X-ray powder diffraction analysis and associated calculation, we gained the C3S precision cell parameters and atomic coordinates, then built three-dimensional models of C3S crystal structure. A C3S crystal electron backscatter scattering diffraction（EBSD）precise crystallographic database is established by EBSD test, [1] and it lays the foundation of study C3S from orientation angles[2-3], we standardized electron backscatter diffraction pattern (EBSP) of C3S crystal and took its EBSD phase identification test too by the database and its conclusions tally with that of X-ray powder diffraction test and calculation quite well.