K-value method

Table 2-4. Approximate guides for selection of K-value methods.

Thus a k-value method retains forces at k-3 previous steps. 

Standard K value method is essentially the internal standard method, but with a difference that K value method does not require drawing the standard curve and it is very suitable of a large number of samples for analysis. When determining the content of one phase (a) in mixture contained N phases, it can be added a new known standard phase (s) to the sample which is not present in the sample, making a complex sample containing IV 4-1 phases. If the intensity of strongest diffraction line of phase (a) is la, the intensity of the standard material (s) is Ig, based on quantitative analysis of the basic equation, we can obtain ... 

Assuming wiistite disproportionation process is in accordance with equation (7.131), then the molar ratio (calculated) of elementary iron and Fc304 after disproportionation can be calculated based on the defect concentration x = 0.059 before disproportionation. The ratio between the two (experimental) can also be calculated by K value method from the result of XRD after disproportionation, as shown in Table 7.15. 

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See also in sourсe #XX -- [ , ]

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