古代中国人造蓝紫硅酸铜钡颜料

这篇文章是对四件附着有硅酸铜钡颜料的中国古代器物的研究。其中三个样品是彩陶颗粒,来自甘肃省张家川马家源遗址,它属于战国晚期（474-221BC）。另外是对山东章丘威山汉墓壁画上的（206BC-8AD）单个晶体的单独研究。一个彩陶颗粒样品和单个晶体表明有中国深蓝（BaCu2Si2O7）存在,这是一关于硅酸铜钡的新发现。相对于已知道中国蓝（BaCuSi4O10）和中国紫（BaCuSi2O6）,这种BaCu2Si2O7成分被称为中国深蓝,该彩陶颗粒的颜料层也含有中国蓝中国紫。还运用了SEM和EDX对其表面形态的分析和通过拉曼光谱对中国蓝、中国紫元素成分的分析。x射线对单个晶体的分析知道了BaCu2Si2O7化合物的结构。通过现代仪器的综合分析研究,推断前期硅酸铜石英相谱图,白色Ba2CuSi2O7成分,仅有很小的可能性在历史遗迹中找到该颜料。     

A new programme of obsidian characterization at Çatalhöyük,Turkey

This paper details the chemical sourcing of 135 obsidian artefacts from Çatalhöyük, a Neolithic site in central Anatolia, the trace-elemental analyses being undertaken in two laboratories using ICP-MS, ICP-AES and LA-ICP-MS. The material is assigned to three sources in Cappadocia: Göllü Da?-east, Nenezi Da? and Ac?göl West. The various interrelationships of technology, raw material and date are considered, the data suggesting an increased reliance upon the Nenezi Da? source in the latter part of the Early Neolithic, a shift that coincides with, and is related to, the introduction of new blade technologies.     

How reliable are our published archaeometric analyses? Effects of analytical techniques through time on the elemental analysis of obsidians

To assess the analytical accuracies and precisions of archaeometric elemental analyses by different techniques, a relatively homogeneous material such as obsidian must be studied. An assessment of published elemental concentration data from two Anatolian obsidian sources shows that while in most cases analytical accuracy is as high as is commonly expected, in some cases it is not. It also shows that the dispersions of elemental concentration data (indicators of analytical precisions) coming from modern analytical procedures are akin to the estimated homogeneity of the obsidian. Based on this latter observation, if one has element dispersion data from a single analytical technique, with a single source of obsidian as a control, data sets that contain multiple, but similar sources of obsidian may be differentiated.