X-ray diffraction (XRD) and high-resolution scanning electron microscopy (SEM) have been used to characterize the silver mercury amalgam particles resting on the surface that comprise the image of five daguerreotype plates that were not gilded and that were prepared by three different contemporary daguerreotype makers. The regions of interest of the surface that were examined were overexposed, solarized, and highlight (white) areas. The XRD portion of the study shows that the two main silver mercury amalgam particles identified using the International Center for Diffraction Data PF4 + database were the Schachnerite/ζ (zeta) phase amalgam, Ag1.1Hg0.9, and the mercury silver amalgam, Ag0.65Hg0.35. On one of the daguerreotypes a third silver mercury amalgam, Moschellandsbergite, Ag2Hg3, was also identified in small concentrations. High-resolution SEM images corroborate the diffraction data and show that the crystalline nature of the silver mercury amalgam particles on all five plates to be mostly hexagonal, which would correspond to the Schachnerite/ζ (zeta) phase amalgam, and fewer rectangular solid and cubic crystals corresponding to the mercury silver amalgam.

中文翻译：

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使用XRD和SEM表征现代未镀金Daguerreotypes的成像颗粒。

X射线衍射（XRD）和高分辨率扫描电子显微镜（SEM）已用于表征停留在表面上的银汞合金颗粒，这些颗粒包括五个未镀金的daguerreotype板的图像，并由三种不同的方法制备当代daguerreotype制造商。被检查表面的目标区域曝光过度，日晒和高光（白色）区域。研究的X射线衍射部分显示，使用国际衍射数据中心PF4 +数据库确定的两个主要银汞合金汞颗粒是Schachnerite /ζ（zeta）相汞合金Ag1.1Hg0.9和汞银汞合金Ag0 .65Hg0.35。在其中一种daguerreotypes上，还发现了第三种银汞齐汞合金Moschellandsbergite Ag2Hg3。