FTIR study on the polymorphic structure of tricalcium silicate
FTIR study on the polymorphic structure of tricalcium silicate
复制标题
硅酸三钙多晶型结构的FTIR研究
DOI：
10.1016/j.cemconres.2016.11.021
复制
发表时间：
2017-09-01
影响因子：
11.4
通讯作者：
Ye, Jiayuan
中科院分区：
文献类型：
--
作者：
Ren, Xuehong;Zhang, Wensheng;Ye, Jiayuan
研究了不同晶型硅酸三钙（C3 S）的红外光谱。通过合成具有不同类型和数量的外来离子但相同多晶型的样品，识别了多晶型和取代基离子对C3 S的IR光谱的变化的影响。C_3S的红外光谱主要取决于多晶型。取代基离子的影响很小。T-1和T-2的红外光谱非常相似。两者都显示对应于对称振动的禁带，表明[SiO 4]（4-）四面体从理想四面体强烈扭曲。随着C_3S晶体对称性的增加，多晶型T_1-> T_2-> T_3-> M_1-> M_3-> R的谱带数目减少，谱峰变宽。在T3、M1、M3和RC 3S中，[SiO 4]4四面体没有对称的伸缩带，在812 cm（-1）处有一个尖锐的峰，表明[SiO 4]4四面体保持了近似正四面体的对称性。
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 T-1 and T-2 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.