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- W2339080147 abstract "The samples used in this study are of various coloured varieties of marbles collected from marble dealers. The specific activity concentration of 2 3 8 U, 2 3 2 Th and 4 0 K has been determined by gamma ray spectrometry. The materials showed concentrations of 2 3 8 U, 2 3 2 Th and 4 0 K which were found to be dramatically variable depending on mineral content and type of formation. Using FTIR and thin section analyses, quartz, feldspar, calcite and mafic minerals present in the samples have been determined quantitatively. From our experimental data, it can be seen that the geochemical parameters such as SiO 2 or mafic minerals or CaCO 3 may be considered to be an appropriate index to select the marbles of low radiological risk. The average specific activities of 4 0 K are found to be higher than 2 3 2 Th and 2 3 8 U. The ratio of Th/U was calculated and correlated. Assessment of radiological hazards was made by calculating radium equivalent activities, external and internal hazard indices which were found to vary from 30.92 to 54.45, 0.08 to 0.14 and 0.10 to 0.17 Bq/kg, respectively. The observed values are lower than the recommended limits." @default.
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- W2339080147 date "2005-11-01" @default.
- W2339080147 modified "2023-09-23" @default.
- W2339080147 title "Evaluation of natural radioactivity and radiological hazards caused by different marbles of India" @default.
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