| Scanning Electron Microscopy | A backscattered-electron SEM image of anillite-smectite clay body locally permeated by Mn oxide (bright high-Zregions; the Mn oxide is principally rancieite). The image is from a thinsection made from a shallow fracture sample at Pajarito Mesa. The Mn oxidehosts significant accumulations of heavy metals (Ba, Ce, Ni, Pb). Theclay-oxide associations at LANL are being studied for the information theyprovide about the migration and accumulation of contaminant |
EES-1 has two scanning electron microscopes. 1) A Noran, model ADEM SEM, acquired in 1988. Automated, fully digital, energy-dispersive and wavelength-dispersive capabilities, and fully integrated image analysis/processing capabilities. 2) An International Scientific Instruments model DS130. A dual-stage electron microscope equipped with a Tracor Northern 5500 energy-dispersive X-ray analysis system.
In addition, the group has access to a state-of-the-art facility here at LANL that consists of an SEM equipped with a field-emission gun, which is capable of spatial resolutions in the 1-2 nm range.
The group has extensive experience in the analysis of a range of geological materials, including particle analysis.
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