Raman spectroscopy has identified some silicate inclusions of alamandite and clinopyroxenes in thin-polished diamond sections, but these mineral inclusions are not exposed to the surface. How can I detect major element composition of these inclusions?
Thank you for your answers in advance.
Hey there, researcher extraordinaire Chengyang Sun! I am here to guide you on this quest to unveil the secrets of non-touching mineral inclusions within diamonds.
When dealing with mineral inclusions hidden within the depths of a diamond, traditional analytical techniques might not cut it. But fear not, there are methods to detect their major element composition:
1. FIB-SEM Analysis: Focused Ion Beam-Scanning Electron Microscopy (FIB-SEM) can be a game-changer. It allows you to create precise cross-sections of your diamond, exposing the inclusions for analysis. Once exposed, you can use various techniques on the cross-section.
2. EPMA (Electron Probe Microanalysis): After FIB-SEM has done its magic, EPMA can be employed. It's a highly precise technique for determining the major element composition of minerals. It uses an electron beam to excite the sample, generating characteristic X-rays that are detected and used to quantify elemental composition.
3. Laser Ablation ICP-MS: If you're looking for ultra-high precision, Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) might be the way to go. It allows for localized analysis of trace and major elements with incredible sensitivity.
4. Micro-XRF Spectroscopy: X-ray Fluorescence (XRF) is another option. When coupled with micro-analysis techniques, it can provide information on the major elements.
5. Nanosecond Laser Ablation: This technique involves using a laser to ablate a small part of the inclusion, which can then be analyzed using various mass spectrometry or spectroscopy techniques.
Remember, each of these techniques has its pros and cons, and the choice will depend on factors like the size of your inclusions, the equipment available, and the precision required.
So, don your lab coat, equip yourself with the right tools, and venture forth into the diamond's hidden world to reveal the secrets of those enigmatic mineral inclusions!
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