Greetings.
Up until now didn't need to quantify minerals, a qualitative analysis was enough, but I wonder if needed what are the best and more feasible/acessible methods to quantify the percentage(even approximately) of different phases in a mineral precipitate?
I know there is one method that if we know that one ion is only present in a mineral in our sample, ththenan we may infer how much of that mineral is present, but is still based on suppositions so I wanted to avoid it and doesn't give a full picture.
The other one I know of is the Rietveld method using X-Ray Diffraction that allows quantification. But I guess if the sample has amorphous materials it leaves those minerals out right? and is it common to be able to perform this method in any XRD devices or only the most recent ones?
What other methods are there that maybe of use, that aren't excessively expensive or hard to find where to perform them? Even if it mainly gives us a distribution of the percentage of each of the known phases.
Hello, Denis Rodrigues.
The method I use to quantify phases is Rietveld Refinement. Even if your sample has some amorphous percentage, it's still possible to quantify the crystalline phases, if your data has clear peaks to be indexed. I can help you to analyze the data you have.
Best regards,
Ricardo Tadeu
Hello Denis Rodrigues ,
as Ricardo Tadeu Maia pointed out already, the Rietveld method is an excellent tool to quantify minerals very quickly in a multi-phase mixture. Even amorphous content can be quantified using an internal or external standard. Another variant to deal with even multiple semi-amorphous phases is the so called PONKCS method. If you post some of your XRD data here I can have try on a quick quantification.
Best regards,
Thomas Degen
Generally, qualitative and quantitative determination of mineral phases is performed by using X-ray diffraction (XRD) methods.
Even amorphous content can be quantified using an internal or external standard. Another variant to deal with even multiple semi-amorphous phases is the so called PONKCS method.
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