四面体
取代基
硅酸盐
离子
结晶学
红外光谱学
红外线的
谱线
晶体结构
Crystal(编程语言)
化学
傅里叶变换红外光谱
材料科学
立体化学
物理
有机化学
光学
程序设计语言
天文
计算机科学
作者
Xiaofeng Ren,Wensheng Zhang,Jiayuan Ye
标识
DOI:10.1016/j.cemconres.2016.11.021
摘要
The infrared (IR) spectra of various tricalcium silicate (C3S) polymorphs were studied. The effects of variation in the polymorph and substituent ions on the IR spectra of C3S were discerned by synthesizing samples with differing types and amounts of foreign ions but the same polymorphic form. The IR spectrum of C3S mainly depends on the polymorphic form. Substituent ions have a weak influence. The IR spectra of T1 and T2 are very similar. Both show forbidden bands corresponding to symmetric vibration, indicating that [SiO4]4 − tetrahedra are strongly distorted from an ideal tetrahedron. With an increase in the crystal symmetry of C3S, the number of bands for the polymorphs T1 → T2 → T3 → M1 → M3 → R decrease, and the peaks become broader. The absence of symmetric stretching bands with a sharp peak at approximately 812 cm− 1 indicates that the [SiO4]4 − tetrahedra retain an approximately regular tetrahedron symmetry in T3, M1, M3 and R C3S.
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