Preliminary results on structural state characterization of K-feldspars by using thermoluminescence
Part of : Mediterranean archaeology & archaeometry : international journal ; Vol.13, No.3, 2013, pages 155-161
Issue:
Pages:
155-161
Author:
Abstract:
Feldspars are amongst the most widely used minerals for luminescence dating, besides having certain drawbacks such as anomalous fading. The present study attempts, for the first time in the literature, a direct correlation between the thermoluminescent intensity and specific structural parameters of alkali feldspars, such as the probability of Al-cation to occupy specific sites in the forming tetrahedra and the volume of the unit cell. The TL intensity was studied in the present study, in both terms of integrated signal throughout the entire glow curve region, as well as TL peak resolved integral following de-convolution analysis. In both terms, the TL intensity was found to be extremely sensitive to the aforementioned structural parameters. Moreover, the TL signal of the deconvolved shallow TL peak (termed as P1 throughout the text) was proved to be a diagnostic tool towards discriminating among the three phases of K-feldspars, namely sanidine, orthoclase and microcline, besides X-Rays and Transmission Electron Microscopy.
Subject:
Subject (LC):
Keywords:
K-feldspars, sanidine, orthoclase, microcline, TL
References (1):
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