Mg2Si晶体结构及消光特性的研究

Structure and extinction properties of Mg_2Si crystal

基于高能X射线的散射理论,研究了Mg2Si晶体的结构和消光特性.结果表明,Mg2Si晶体具有反萤石结构,当衍射指数H,K和L奇偶混合时其散射光就会出现系统消光,而当衍射指数H,K和L全为偶数或者全为奇数时,其散射光就会出现衍射.在实际应用中对研究具有反萤石结构的晶体具有重要意义.

Based on scattering theory of high-energy x-ray,the structure and extinction properties of Mg_2Si crystal have been studied.It is shown that for Mg_2Si with antifluorite structure extinction only occurs if the indices of diffraction H,K and L are neither all odd nor all even,and diffraction occurs if H,K and L are either all odd or all even.It is of great significance to study the crystal with antifluorite structure in application.