Abstract We present a novel electron diffraction technique (Automated precession 3D diffraction tomography - ADT) based on a Transmission Electron Microscope (TEM) to precisely determine unit cell parameters, Space Group symmetry and atomic structure of various pigment/opacifier crystallites of submicron dimensions and commonly present in colored Roman glass tesserae. Such technique can operate at nanometer scale and it is possible to distinguish even between mineralogical phases of similar/same chemical composition, but different crystal structures.

中文翻译：

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文化遗产材料分析的新方法：透射电子显微镜 (TEM) 3D 电子衍射断层扫描应用于罗马玻璃镶嵌

摘要 我们提出了一种基于透射电子显微镜 (TEM) 的新型电子衍射技术（自动进动 3D 衍射断层扫描 - ADT），以精确确定亚微米尺寸的各种颜料/遮光剂微晶的晶胞参数、空间群对称性和原子结构。存在于彩色罗马玻璃镶嵌中。这种技术可以在纳米尺度上运行，甚至可以区分化学成分相似/相同但晶体结构不同的矿物相。