TEM study of synthetic hillebrandite (Ca_2SiO_4 · H_2O)
TEM study of synthetic hillebrandite (Ca_2SiO_4 · H_2O)
复制标题
合成希勒布兰石(Ca_2SiO_4·H_2O)的TEM研究
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
T. Mitsuda
中科院分区：
文献类型：
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作者：
Y. J. Kim;W. Kriven;T. Mitsuda
水热法制备水铝石（硅酸二钙水合物）。用透射电镜和高分辨电镜研究了其晶体结构和显微结构。大多数的钙铝榴石纤维表现出平行于B轴的伸长，并倾向于位于{001}解理面上。选定区域的衍射图案经常显示连续的条纹，相应的暗场图像显示堆叠的障碍垂直于纤维轴。{hkO}反射和钙铝榴石的形貌、堆积无序和消光条件与硅灰石（CaSiO_3）和钙铝榴石（Ca_2NaH[SiO_3]_3）相似。位移矢量为1/2 B的周期性（100）断层活动被认为是条纹状和系统性缺如的主要成因。
Hillebrandite (dicalcium silicate hydrate) was produced by a hydrothermal process. Its crystal structure and microstructures were investigated by conventional TEM and HREM. Most hillebrandite fibers showed their elongation to be parallel to the b axis and tended to lie on the {001} cleavage planes. Selected area diffraction patterns frequently displayed continuous streaking, and corresponding dark-field images revealed stacking disorders perpendicular to the fiber axis. The morphology, stacking disorders, and extinction conditions of {hkO} reflections and hillebrandite resembled those of the minerals wollastonite (CaSiO_3) and pectolite (Ca_2NaH[SiO_3]_3). Periodic (100) faulting with a displacement vector 1/2 b is suggested to be the major origin of the streaking and the systematic absences in hillebrandite.