TY  - JOUR
T1  - Importance of grain size distribution in quantitative analysis using Rietveld Method: An experimental study
AU  - Talay, Arif
AU  - Kiliç, Cumhur Özcan
PY  - 2025
DA  - November
Y2  - 2025
DO  - 10.19111/bulletinofmre.1819341
JF  - Bulletin  of the Mineral Research and Exploration
JO  - Bull.Min.Res.Exp.
PB  - Maden Tetkik ve Arama Genel Müdürlüğü
WT  - DergiPark
SN  - 0026-4563
SP  - 1
EP  - 2
VL  - 178
IS  - 178
LA  - en
AB  - The Rietveld method refines a theoretical line profile until it fits the measured profile using a least squares methodology. In Rietveld method, complete qualitative mineral determination, mineral chemistry, appropriate XRD analytical conditions and sample preparation steps should be applied correctly. This study aims to determine the grain size-dependent variations in the quantitative compositions of minerals with various chemical compositions and crystallographic characteristics. Eight pure minerals (quartz, calcite, halite, colemanite, barite, polyhalite, gypsum, thenardite) are been selected, powdered, pulverized and separated into 3 different grain sizes as 228μm (Dv90), 29μm (Dv90) and 8μm (Dv90). These minerals are mixed in certain proportions to prepare three mixture samples. Mixture samples are evaluated using the Rietveld Method on XRD whole rock patterns and then compared to the actual reference mixture sample whose mixing ratio is known for each grain size. Sample with a grain size of 8μm (Dv90) with random orientation gave the closest result compared to the reference content. If the structural and physical refinement stages are processed properly, accuracy of percentage mineralogical composition increases when the grain size decreases.
KW  - Mineralogy
KW  - X-Ray Diffraction (XRD)
KW  - Rietveld Method
KW  - Quantitative Analysis
KW  - Grain Size
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UR  - https://doi.org/10.19111/bulletinofmre.1819341
L1  - https://dergipark.org.tr/tr/download/article-file/5400703
ER  -