29Si NMR Study of Chemical Shift Tensor Anisotropy of Tricalcium Silicate
29Si NMR Study of Chemical Shift Tensor Anisotropy of Tricalcium Silicate
复制标题
硅酸三钙化学位移张量各向异性的 29Si NMR 研究
DOI:
10.1007/978-3-642-80432-8_3
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发表时间:
1998
影响因子:
0.5
通讯作者:
H. Zanni
中科院分区:
文献类型:
--
作者:
A. Grimmer;H. Zanni
Using extremely slow (270Hz) MAS spinning rates the 29Si chemical shift tensor data of the various individual SiO4 tetrahedra of C3S(T1) are determined. The averaged principal values are δ1 = −65.7 ppm, δ2 = −72.3 ppm and δ3 = −79.1 ppm. These data are compared with the principal values of β- and γ-C2S. As the tensor data reflect the symmetry of the SiO4 tetrahedra the following empirical correlation has been established between the shape of the SiO4 unit and the reaction of calcium silicates with water: the more symmetric the tetrahedra the faster the hydraulic reaction.