While you can identify some elements with EDS, XRD is better for this task.

Well,

Also, Mineral identification was performed on the micrometer scale using a combination of scanning electron microscopy (SEM) and electron microprobe.

Article Aeolian influx and related environmental conditions on Gran ...

REGARDS

You can use EDAX, XPS, and XRD analysis to find chemical composition.

Dear Dr. Saha

You have two methods to choose from SEM_EDX and SEM_WDX which can be applied to polished sections. The technique is not as precise as EMPA but the chemical composition can be recalculated from the microchemical analysis to your satisfaction. It may work much better for some sulfides than for silicates bearing (OH) groups. With some experience you can achieve reasonable results. I wish you much success H.G.Dill

Identification of key minerals is of great importance to determining the petrologic history of a sample. These key minerals may be few in number and present as small microinclusions (less than 100 µm) making them difficult to identify, if at all, with the petrographic microscope. Therefore, imaging by electron-microprobe or scanning electron microscope are the methods traditionally used. However, because of the small field of view available on these instruments at a magnification necessary to resolve micron sized relicts and textures, the search for a few microinclusions may be extremely time consuming, tedious and costly.

EDAX, XPS, XRD, FTIR, and BET

Spot analysis on minimum of 3 spots per grain samples (in microns) can as well help in understanding the micro-chemical variations and stoichiometry formula is to be calculated. However SEM -WDS (EPMA) works better than SEM-EDS.Article Mineralogical and Geochemical Signatures of Metalliferous Se...