Solid State Geochemistry: High-Resolution Transmission Electron Microscopy of Minerals

这个项目致力于研究，在最好的 显微镜尺度可达到的，矿物及其偏差， 结构和化学理想性。电子束技术将是 包括高分辨率传输和分析 电子显微镜以及扫描探针显微镜（扫描 隧道和原子力），以研究局部区域的 矿物结构和化学无序。此类区 共同的，并提供洞察（a）起源和地质 历史的主机矿物，作为记录器的未完成的 反应;和（B）反应机理，例如在 变质、成岩和风化作用。 PI和团队计划专门研究层状硅酸盐 矿物（包括混层蒙脱石和柯绿泥石; 硫化铍、富铁铍和混合层中间体;和 一种独特的纤维状云母），以及C-60和其他富勒烯， 自然他们还将探索使用先进的技术， 作为TEM阴极发光，高角度环形暗场 成分映射，扫描探针显微镜，和超高 分辨率电子显微镜适用于研究 矿物

This project is dedicated to the study, at the finest microscope scale attainable, of minerals and their deviations from structural and chemical ideality. Electron-beam techniques will be applied, including high-resolution transmission and analytical electron microscopy as well as scanning probe microscopy (scanning tunneling and atomic force) to study localized regions of structural and chemical disorder in minerals. Such regions are common and provide insights into (a) the origin and geologic history of the host minerals, which act as recorders of uncompleted reactions; and (b) reaction mechanisms such as occur during metamorphism, diagenesis, and weathering. The PI and team plan specifically to study layer silicate minerals (including mixed-layer chlorite/smectite and corrensite; berthierine, Fe-rich chlorite, and mixed layer intermediates; and a unique fibrous mica), and C-60 and other fullerenes found in nature. They also will explore the use of advanced techniques such as TEM cathodoluminescence, high-angle annular dark-field compositional mapping, scanning probe microscopy, and ultra-high resolution electron microscopes as applicable to the study of minerals