1. J. Appl. Cryst. (1983). 16, 150-154 [ doi:10.1107/S0021889883010146 ]
An improved program for searching and matching of X-ray powder diffraction patterns Lin Tian-Hui, Zhang Sai-Zhu, Chen Li-Jun and Cai Xin-Xing Abstract: Two major improvements have been made in the present program: (1) a so-called `substance-type discrimination' has been introduced into the searching process, which can reduce missearching remarkably; (2) a new method for quantitative intensity matching has been proposed and can give reasonable results.
3. Journal of Applied Crystallography Volume 10 Issue 3 Page 147-150, June 1977
To cite this article: L. S Zevin (1977) A method of quantitative phase analysis without standards Journal of Applied Crystallography 10 (3) , 147–150 doi:10.1107/S0021889877013144
Prev Article Next Article Abstract A method of quantitative phase analysis without standards L. S.Zevin Abstract It is shown that to determine the quantitative phase composition of n samples each of which contains n phases it is sufficient to obtain a set of n2 intensities values of analytical lines, Iij, where 1 ≤ i ≤ n is the phase number in a sample of number 1 ≤ j ≤ n. It is supposed that in every sample the complete phase composition is determined. To calculate concentrations in one sample a system of consisting of n linears equations was obtained: where s is the number of the sample, the mass absorption coefficient of the phase to be determined, x_is the weight fraction of the ith phase in the analysed sample. This system is modified if there are additional data on the samples, e.g. values of mass absorption coefficients. The use of this method excludes measurement of analytical line intensity in the pure phase or mixture of pure phases. Experimental verification of the method with two- and three-phase artificial mixtures gave satisfactory results. The necessary conditions for the application of this method are essential differences in the quantitative phase composition of the samples analysed.
2. Journal of Applied Crystallography Volume 7 Issue 6 Page 519-525, December 1974
To cite this article: F. H Chung (1974) Quantitative interpretation of X-ray diffraction patterns of mixtures. I. Matrix-flushing method for quantitative multicomponent analysis Journal of Applied Crystallography 7 (6) , 519–525 doi:10.1107/S0021889874010375
Prev Article Next Article Abstract Quantitative interpretation of X-ray diffraction patterns of mixtures. I. Matrix-flushing method for quantitative multicomponent analysis F. H.Chung Abstract A matrix-flushing method for quantitative multicomponent analysis by X-ray diffraction is reported. It is simpler and faster than, yet as reliable as, the conventional internal-standard method. In this new method, the calibration-curve procedure is shunted; a more fundamental `matrix-flushing' concept is introduced. The matrix-flushing theory gives an exact relationship between intensity and concentration free from matrix effect. Contrary to most theoretical methods the working equation is very simple, no complicated calculations are involved. The matrix-flushing theory and the analytical procedure are presented. Eight illustrative examples are drawn to demonstrate how this theory is applied to multicomponent analysis and amorphous-content determination. A novel `auto-flushing' phenomenon of binary systems was observed which appears to make the analysis of any binary system a simple matter.
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