Thermoluminescence of kunzite: A study of kinetic processes and dosimetry characteristics

Ogundare, F.O.; Alatishe, M.A.; Chithambo, M.L.; Costin, Gelu

doi:10.1016/j.nimb.2016.02.059

Cited by 6 publications

(3 citation statements)

References 23 publications

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“…The two well-known varieties kunzite and hiddenite were named after the esteemed American geologists and collectors George F. Kunz and William E. Hidden, respectively [11]. Kunzite is a major source of Li, which is used in different materials, such as mobile phones and automotive batteries, in lithium carbonate production, ceramics and as flux agent [12,13].…”

Section: Sample Preparationmentioning

confidence: 99%

“…On the other hand, Mn 2+ has an appreciably greater ionic size than Al 3+ and requires additional charge compensation to fit into the Al 3+ octahedral site. The ionic radius of Mn 2+ is close to Li and thus facilitates substitution into the M2 site in kunzite, while the tetrahedral site is occupied by Si [13,20]. However, in the case of Mn 2+ d-d electronic transition is spin-forbidden and also no Jahn−Teller distortion is possible for this ion [29].…”

Section: Ionic Structure Considerationmentioning

confidence: 99%

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An X-ray Absorption Near-Edge Structure (XANES) Study on the Oxidation State of Chromophores in Natural Kunzite Samples from Nuristan, Afghanistan

Rehman

Martens²,

Tsai³

et al. 2020

Minerals

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Kunzite, the pink variety of spodumene is famous and desirable among gemstone lovers. Due to its tenebrescent properties, kunzite always remains a hot research candidate among physicists and mineralogists. The present work is continuing the effort towards value addition to kunzite by enhancing its color using different treatments. Before color enhancement, it is essential to identify the chromophores and their oxidation states. In this paper, the authors investigated the main impurities in natural kunzite from the Nuristan area in Afghanistan and their valence states. Some impurities in the LiAlSi2O6 spodumene structure were identified and quantified by using sensitive techniques, including Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS), UV−VIS and X-ray absorption near-edge structure (XANES). LA-ICP-MS indicated many trace elements as impurities in kunzite, among which Fe and Mn are the main elements responsible for coloration. The oxidation states of these two transition elements were determined by the XANES technique. The study reveals that Mn is present in both Mn2+ and Mn3+ oxidation states, while Fe is present only in Fe3+ oxidation state.

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Section: Sample Preparationmentioning

confidence: 99%

Section: Ionic Structure Considerationmentioning

confidence: 99%

An X-ray Absorption Near-Edge Structure (XANES) Study on the Oxidation State of Chromophores in Natural Kunzite Samples from Nuristan, Afghanistan

Rehman

Martens²,

Tsai³

et al. 2020

Minerals

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show abstract

“…Some minerals exhibit a natural TL intensity, which is so intense that it could be easily measured or even observed by the naked eye (McKeever, 1985). For example, one might cite studies dedicated to investigating the potential of using minerals for dating and retrospective dosimetry (Mahmood et al, 2022;Ogundare et al, 2016) and the understanding of the defects and lattice parameters (Kalita;Wary, 2016;Sawakuchi;Dewitt;Faleiros, 2011). Furthermore, TL has also been applied in the research of meteorites because their TL signal might be used to deduce the orbital temperatures and ageing (from the fall), in addition, the metamorphism degree might be inferred due to the change in the TL sensitivity (Biswas et al, 2011;Bossin et al, 2017;Bull, 1986).…”

Section: Applications Of Thermoluminescence and Optically Stimulated ...mentioning

confidence: 99%

Luminescência em cristais de HfO2: síntese, efeito do tratamento térmico, defeitos relacionados, e sua aplicação em dosimetria de radiação ionizante.

Soares

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thing, gave me suggestions and advice, or opened their laboratories to me, and of course, people who are also friends and who made this journey easier. I hope I have not missed anyone here.As of now, thanks so much to you all.Firstly, I want to thank God and my family (my parents Cicero and Ivanilda, and my sister Soraia) for the immeasurable support. The certainty I have of you being there is by itself a comfort. I was always encouraged that education is a powerful tool, and no one can take it from me.My academic path would have been neither enjoyable nor successful if I did not have an advisor who is not just a scientific example, but also a friend. So, special thanks to Professor Dr Sonia Tatumi, whom I have known for more than eight years now, and who has an experience that she is always willing to pass on. Thank you for your endless patience, the wise advice, the incentive by saying "vai dar certo!" when I might have thought something would not work, and for pushing me forward to get the best.Vielen Dank Dr Clemens Woda, for kindly hosting me at the Institute of Radiation Medicine of the Helmholtz Zentrum München for one year. Your expertise enriched this work. An extended acknowledgement to the other researchers of the group in Munich, Dr Markus, Dr Janine, and Dr Kaiser. Moreover, a special thanks to Alessia Mafodda and Elif Kara, for their friendship.Thanks to Laurence Taylor, my partner, for your company and confidence in me, even in the harsh moments. Your support motivates me to seek the best.To the people from the laboratory of dosimetry and dating (LDD) of the Federal University of São Paulo (UNIFESP), where I started to understand what it means to do research.

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UV effect on the cathodo- and thermoluminescence properties of a gem-quality Cr-rich diaspore (α-AlOOH)

Topaksu

Correcher

Boronat

et al. 2018

Applied Radiation and Isotopes

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Thermoluminescence of kunzite: A study of kinetic processes and dosimetry characteristics

Cited by 6 publications

References 23 publications

An X-ray Absorption Near-Edge Structure (XANES) Study on the Oxidation State of Chromophores in Natural Kunzite Samples from Nuristan, Afghanistan

An X-ray Absorption Near-Edge Structure (XANES) Study on the Oxidation State of Chromophores in Natural Kunzite Samples from Nuristan, Afghanistan

Luminescência em cristais de HfO2: síntese, efeito do tratamento térmico, defeitos relacionados, e sua aplicação em dosimetria de radiação ionizante.

UV effect on the cathodo- and thermoluminescence properties of a gem-quality Cr-rich diaspore (α-AlOOH)

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