Dear all,
I have been trying to quantify phases in a powder mixture including LiMnO2 (orthorhombic, cubic, space group: Pmnm) and Mn2O3. I'm trying to use the Rietveld method, but concerning formation of amorphous phases can affect to the accuracy of quantification. The RIR method can determine the amount of amorphous phases, but I do not have the RIR value of the above LiMnO2 phase. Thus, I mix this mixture with 10 % of alpha-Al2O3 (corundum) and perform the Rietveld method to determine the amount of crystallite phases (eg. the calculated wt%: 11 % Al2O3, 85% LiMnO2, 4% Mn2O3), so the total amount of amorphous phases is 9.09 %. Is this performance true? And can anyone phease recommend me any reference which has the RIR value of the above LiMnO2 phase?
Thanks for your helps.
Dear Pham Van Thang
your quantitative analysis approach seems logical, it's crucial to validate your results and consider potential sources of error. Additionally, thorough literature research and consultation with experts can help you address any gaps in your knowledge or data.
The approach you've described seems reasonable in theory. However, the accuracy of the quantification depends on several factors, including the accuracy of the Rietveld refinement, the appropriateness of the internal standard, and the assumption that there are no interactions between phases that could affect the intensity of diffraction peaks. It's essential to validate your results through comparison with other analytical techniques or reference materials, particularly since you don't have the RIR value for LiMnO2.
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