A novel clinker with low Ca/Si ratio (low CO2 emissions) and low sintering temperature (low energy consumption) was synthesized.The clinker mainly contains C3S2 and CS.Two progressive routes were adopted to sinter the type of clinker: chemical pure reagent synthesis and industrial raw material preparation.The quantitative analysis of mineral composition was performed by X-ray powder diffraction using the Rietveld method.Results showed that in the first route the optimal formation temperature was about 1400℃ with soaking time more than 10 hours;as for the second approach, it showed that alkali metal, alkaline-earth metal and feldspar family mineralizer can facilitate the reaction, decreasing the f-CaO seriously and increasing the yield of C3S2 and CS significantly.However, the amount of mineralizer must be well controlled since Na+, Mg2+ and Al3+ could be incorporated into the crystal lattice of CS and C2S, resulting in solid solution.The products of the carbonation were characterized by X-ray powder diffraction (XRD).The microstructures of the products were observed using a scanning electron microscope (SEM) with energy dispersive spectroscopy (EDS) analysis.Experiments indicated that C3S2 and CS could serve as effective agents for CO2 sequestration by carbonation, whose products (CaCO3 and SiO2) could contribute to strength development.