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EPMA Standard Materials / Re: Unsure of Analysis Standard
« Last post by Probeman on July 12, 2024, 07:03:24 AM »As it turns out the weight %'s they reported are using oxford's factory quant standards inside Aztec...I'm at a bit of a loss what to even do with this block of material now
I talked with our single crystal diffraction expert, Lev Zakharov, and asked him if he could determine the SiC stoichiometry if the materials was single crystal and he responded:
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To get the full structure based on X-ray diffraction single crystal method. I can do. Stoichiometric will went out automatically based on the single crystal structure. Powder X-ray diffraction can be used but you need to have powder diffractions from the pure Si and C standards.
Then I asked about the accuracy of such methods and he responded:
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I have never been evaluated and never seen such evaluations. From a general consideration I think i t seems to be around 3%-5% if quality of a crystal used for data collection is good. Typically, 3%-5% is a difference between intensities of symmetrical X-ray diffraction reflections which should be the same based on symmetry.