By means of the combustion bomb β 2CaO·SiO 2 has formed with lower crystallinity
more defects and higher reactivity in this paper. Its standard enthalpy of formation is determined to be -2 317 0 kJ/mol. Cell parameters which are a =0 551 8 nm
b =0 679 0 nm
c =0 933 0 nm
β =94 47° have been gained from XRD of powder β 2CaO·SiO 2.