Superstructure in a triclinic phase of tricalcium silicate

被引：22
|
作者：
Urabe, Kazuyori [1 ]
Shirakami, Tatsuya [1 ]
Iwashima, Minori [1 ,2 ]
机构：
[1] Department of Materials Chemistry, Faculty of Science and Technology, Ryukoku University, Seta, Otsu 520-2194, Japan
[2] Toray Industries, Inc., Sonoyama, Otsu 520-8558, Japan
来源：
| 2000年 / American Ceramic Soc, Westerville卷 / 83期
关键词：
Crystal orientation - Electron diffraction - Lattice constants - Phase transitions - Transmission electron microscopy - X ray diffraction analysis;
D O I：
10.1111/j.1151-2916.2000.tb01363.x
中图分类号：
学科分类号：
摘要：
A triclinic phase of tricalcium silicate (TI) was investigated using transmission electron microscopy (TEM). Electron diffraction patterns were analyzed by introducing a subcell with the cell parameters of a = 7.081 angstrom, b = 7.043 angstrom, c = 25.230 angstrom, α = 89.97°, β = 90.37°, and γ = 119.44°. It was proven that the coordinates of all the reflections can be expressed to be ha* + kb* + lc* ± m/6(a* + 2b* + 2c*), where m = 0, 1, 2, and 3. The result indicates that the structure modulation in TI is a one-dimensional type with a structural modulation normal to (122). The modulated structure could be observed in a high-resolution TEM image as wavy contrast streaking parallel to the plane with an interval of six times the (122) spacing.
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