Determination of Metastable phases of Alumina Using EDS?

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Determining the specific alumina phase using Energy Dispersive X-ray Spectroscopy (EDS) is challenging. EDS primarily identifies the presence of atoms through atomic transitions, which means that different phases of the same material will show the same atomic composition. While it may be theoretically possible to infer phase differences through relative peak intensities or misidentified peaks, this approach is highly uncertain and not reliable. Overall, EDS is limited in its ability to distinguish between different phases of alumina based solely on elemental analysis.
cruz_johann
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Is it possible to know the kind of alumina phase I have using EDS?
 
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From my, relatively brief, experience with EDX, I want to say no, it is not possible. The reason is that EDX looks simply at atomic transitions, so the only thing you can make sense of is what atoms are present. In the case of different phases of the same material, it will always be the same atoms that are present.

I suppose if one were really good, however, then he/she could MAYBE correlate relative peak intensities and/or "erroneous" peaks (i.e. peaks that are identified as other, non-present elements) to different phases. But again, from my point of view, that's a big maybe.
 

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