Raw data files of X-ray diffraction analysis of the clay fraction from sediment core PS1921-1

Format of files is text, two tab-delimited columns: 1. Angle of goniometer, 2. Counts. Samples were measured with a Cobalt K-alpha bulb in goniometer steps of 0.02 degree. File names consist of core label and depth of sample in six digits cm with leading zeros separated by an underline and ending with _clay.txt. All raw data files are stored in one zip-archive, linked to this metadescription. Clay fraction less than 2 micron was quantitatively separated by Atterberg method (settling tube), washed, dried and milled. Clay was resuspended and texturized on sample holder for analysis.文件格式为文本文件，包含两列制表符分隔的数据：第一列为测角仪（goniometer）角度，第二列为计数。样品采用钴KαX射线管（Cobalt K-alpha bulb）进行测量，测角仪步进角度为0.02度。文件名由核心标签、六位带前导零的样品深度（单位：厘米）组成，各部分以下划线分隔，且文件名以_clay.txt结尾。所有原始数据文件均存储于一个压缩归档（zip-archive）中，该归档与本元数据描述关联。粒径小于2微米的黏土组分通过阿特贝格法（Atterberg method，沉降管settling tube）进行定量分离，随后经洗涤、干燥与研磨处理。将黏土重新悬浮后，在样品架上制样以用于分析。