Analysis of lattice fringe images appeared on ultrathin sections of intergradient clay minerals in soils

土壤中梯度粘土矿物超薄切片上出现的晶格条纹图像分析

• 批准号: 61470124
• 负责人: WADA Koji
• 金额: $ 4.22万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-61470124/
• 关键词: Ultrathin-sectioning; Intergradient clay minerals; Vermiculite; Chlorite; Kaolin mineral; Lattice fringe images; 積層構造; 構造解析

An intergradient clay mineral, "chloritized" vermiculite, present in a Korean Ultisol was studied by ultrathin sectioning and by examining 001 lattice fringe images using high-resolution electron microscopy: 1. Typical mineral particles (diameter, 0.3-0.5<micrn>m; thikness, 0.07-0.14 <micrn>m) are spindle-shaped. Lattice fringes with 14-, 11-12-, 10- and 7-8-<ang> spacinges appear in the samples saturated with K^+ and dried at 25-60゜C. Among these lattice fringes, those with 14-and 11-12-<Ang> spacings are predominant. The lattice fringes are not always straight but are often curved, waved and discontinuous. 2. One particle consists of stacked several "crystals". These "crystals" are packets of silicate layers in which their stacking is more uniform. The "crystals" consist of a kind of silicate layer of more than two kinds of interstratifying silicate layers. There is a tendency for the 7-8-<Ang> layers to be segregated in the portion near to the particle surface. 3. The lattice fringe images do not appear in some portions between the "crystals" and near to the ends of the spindle-shaped particles."Chloritized" vermiculite has been considered vermiculite whose interlayer is partially filled up with hydroxy-Al polymer. The interlayer material dissolved from the mineral had, however, a composition of kaolin mineral, and a partial transformation of each vermiculite layer into kaolin layers was suggested. The electron micrographs which support this suggestion were not obtained, but those suggesting the dissolution of material, which did not show the lattice fringe images and was present between the "crystals" and near to the ends of the spindleshaped particles, were obtained.

一个intergradient粘土矿物，“绿泥石化”蛭石，目前在韩国的Ultisol进行了研究，通过超薄切片和检查001晶格条纹图像，使用高分辨率电子显微镜：1。典型的矿物颗粒（直径0.3-0.5 <micrn>m;厚度0.07-0.14 <micrn>m）为纺锤形。在25-60 ℃干燥的K^+饱和样品中，出现了14-、11-12-、10-和7-8-间距的晶格条纹<ang>。在这些晶格条纹中，具有14-和11-12-间距的晶格条纹<Ang>占主导地位。晶格条纹并不总是直的，而常常是弯曲的、波状的和不连续的。2.一个粒子由几个“晶体”堆叠而成。这些“晶体”是硅酸盐层的包，其中它们的堆叠更均匀。“晶体”由一种硅酸盐层和两种以上的硅酸盐层间层组成。在<Ang>靠近颗粒表面的部分中存在7-8层偏析的趋势。3.晶格条纹图像不出现在“晶体”之间的某些部分和靠近纺锤形颗粒的端部。“绿泥石化”蛭石被认为是层间部分被羟基铝聚合物填充的蛭石。然而，从矿物中溶解的夹层材料具有高岭土矿物的组成，并且建议每个蛭石层部分转化为高岭土层。没有获得支持这一建议的电子显微照片，但获得了那些表明材料溶解的电子显微照片，这些照片没有显示晶格条纹图像，并且存在于“晶体”之间和纺锤形颗粒的末端附近。

项目成果

Koji Wada: Soil Science and Plant Nutrition. 33. (1987)

和田浩二：土壤科学与植物营养。

K. Wada;Y. Kakuto: Clays and Clay Minerals. 37. (1989)

K. 和田；Y.

K.Wada and Y.Kakuto: "Transmission electron microscopic study of "chloritized" vermiculite in a Korean Ultisol." Clays and Clay Minerals. 37. (1989)

K.Wada 和 Y.Kakuto：“韩国 Ultisol 中“绿泥石化”蛭石的透射电子显微镜研究。”