Amazonite in Pakistan: A Comprehensive Study with XRD, XPS, SEM, and PL Analyses
Abstract
Although amazonite minerals from various locations have been studied before rather less attention has been paid to the amazonite mineral from Pakistan. The present work is presented an extensive structural characterization of natural amazonite aliquots (KAlSi3O8) from Tangir Valley, Gilgit-Pakistan. The phase and elemental analysis have been characterized by both X-ray Diffraction (XRD) and X-ray Photoelectron Spectroscopy (XPS), respectively. The surface morphology and particle size have been identified by Scanning Electron Microscopy (SEM). The luminescence properties have been investigated using PhotoLuminescence (PL). In addition, the lifetime of the PL emission measurements has been estimated.
Eventually, this microcline has a triclinic phase, mainly composed of (AlO4)-5 ions, SiO2, metal SiO4, Al2O3 and oxygen originating from impurities. The average particle size is around 1–10 µm with a complex structure. The PL spectrum has broad emission and excitation bands (520 nm and 340 mm respectively). The average lifetime of the PL emission is 265,21 µs. For the accuracy of the results all experiments were performed with not only a single aliquot, but with three aliquots, and representative results are presented.
Keywords
photoluminescence, amazonite, characterization
Supporting Institution
yok
Project Number
yok
Thanks
The author would like to acknowledge Associated Professor Serdar Yıldırım for his valuable technical assistance.
References
- [1] Correcher V., and Garcia-Guinea J., Study of The Luminescence Properties of a Natural Amazonite, Radiation Measurements, 46 (2011) 971-974.
- [2] Mittani J., Cano N., and Watanabe S., Use of [Pb–Pb]3+ Center of The Amazonite for Dating, Applied Radiation and Isotopes, 62 (2005) 251-254.
- [3] Ostroouumov M., Amazonite: Mineralogy, Crystal Chemistry, and Typomorphism, Amsterdam, Boston, Heidelberg, London, New York, Oxford, Paris, San Diego, San Francisco, Singapore, Sydney, Tokyo: Elsevier (2008).
- [4] Gultekin S., Yıldırım S., Yılmaz O., Keskin I., and Katı M., Structural and Optical Properties of SrAl2O4: Eu2+/Dy3+ Phosphors Synthesized by Flame Spray Pyrolysis Technique, Journal of Luminescence, 206 (2019) 59-69.
- [5] Gliozzo E., Mattingly D., Cole F., and Artioli G., In the Footsteps of Pliny: Tracing the Sources of Garamantian Carnelian from Fazzan, South-West Libya, Journal of Archaeological Science, 52 (2014) 218-241.
- [6] Welti A., Lohmann U., and Kanji Z., Ice Nucleation Properties of K-Feldspar Polymorphs and Plagioclase Feldspars, Atmospheric Chemistry and Physics Discussions, 19 (16) (2019) 10901-10918.
- [7] Waldron K., and Parsons I., Solution-Redeposition and the Orthoclase Microcline Transformation: Evidence from Granulites and Relevance to 18O Exchange, Mineralogical Magazine, 57 (1993) 687-695.
- [8] Deer W., Howie R., and Zussman J., An Introduction to the Rock-Forming Minerals, 3rd edition, London: The Mineralogical Society, 2013.
- [9] Riedesel S., Bell A., Duller G., Finch A., Jain M., King G., Pearce N., and Roberts M., Exploring Sources of Variation in Thermoluminescence Emissions and Anomalous Fading in Alkali Feldspars," Radiation Measurements, p. 06541, 2021.
- [10] David F., Walker F.D.L., Lee M. R., and Parsons I., Micropores and Micropermeable Texture in Alkali Feldspars: Geochemical and Geophysical Implications, Mineralogical Magazine, vol 59, pp. 505-534, 1995.