An efficient ionoluminescence analysis of turquoise gemstone as a weakly luminescent mineral

Nikbakht, T.; Kakuee, O.

doi:10.1016/j.saa.2017.02.038

Cited by 7 publications

(3 citation statements)

References 11 publications

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“…The luminescence behaviour of natural turquoise gemstones was investigated using the ionisation pattern of MeV‐energy ion beam, while the elemental information was provided by micro‐PIXE (Nikbakht et al . 2017a). A broad green luminescence band was attributed to

O_{2}^{-}

centres, while blue and red luminescence bands were attributed to UO 2 2+ centres and Fe 3+ ions, respectively.…”

Section: Advances In Accelerator‐based Methodsmentioning

confidence: 99%

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GGR Biennial Critical Review: Analytical Developments Since 2014

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Bugoi

et al. 2017

Geostandard Geoanalytic Res

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This GGR biennial critical review covers developments and innovations in key analytical methods published since January 2014, relevant to the chemical, isotopic and crystallographic characterisation of geological and environmental materials. In nine selected analytical fields, publications considered to be of wide significance are summarised, background information is provided and their importance evaluated. In addition to instrumental technologies, this review also presents a summary of new developments in the preparation and characterisation of rock, microanalytical and isotopic reference materials, including a précis of recent changes and revisions to ISO guidelines for reference material characterisation and reporting. Selected reports are provided of isotope ratio analyses by both solution-nebulisation MC-ICP-MS and laser ablation-ICP-MS, as well as of radioactive isotope geochronology by LA-ICP-MS. Most of the analytical techniques elaborated continue to provide new applications for geochemical analysis, however it is noted that instrumental neutron activation analysis has become less popular in recent years, mostly due to the reduced availability of nuclear reactors to act as a neutron source. Many of the newer applications reported here provide analysis at increasingly finer resolution. Examples include atom probe tomography, a very sensitive method providing atomic scale information, nanoscale SIMS, for isotopic imaging of geological and biological samples, and micro-XRF, which has a spatial resolution many orders of magnitude smaller than conventional XRF

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O_{2}^{-}

centres, while blue and red luminescence bands were attributed to UO 2 2+ centres and Fe 3+ ions, respectively.…”

Section: Advances In Accelerator‐based Methodsmentioning

confidence: 99%

“…The luminescence behaviour of natural turquoise gemstones was investigated using the ionisation pattern of MeVenergy ion beam, while the elemental information was provided by micro-PIXE (Nikbakht et al 2017a…”

Section: Examples Demonstrating the Capabilities Of Iba Techniques Inmentioning

confidence: 99%

GGR Biennial Critical Review: Analytical Developments Since 2014

Linge

Bèdard

Bugoi

et al. 2017

Geostandard Geoanalytic Res

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“…BSL is also noted in rare-earth containing solids, with activators such as Ce 3+ in apatite (Ca 5 (PO 4 ) 3 )(Cl,F,OH) [10]. More rarely, luminescence can also be attributed to rarer [11], Pb 2+ in hydrozincite (Zn 5 (CO 3 ) 2 (OH) 6 ) [12], Tl+ in pezzotaite (Cs(Be 2 Li)Al 2 Si 6 O 18 ) [13], or sulphur-doped (S 2 ) − in doped sodalite (Na 8 Al 6 Si 6 O 24 Cl 2 ) [14].…”

Section: Introductionmentioning

confidence: 99%

Shortwave UV Blue Luminescence of Some Minerals and Gems Due to Titanate Groups

et al. 2023

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This article reviews blue shortwave-excited luminescence (BSL) in natural minerals and synthetic materials. It also describes in detail the emission of seven minerals and gems displaying BSL, as well as three references in which BSL is caused by titanate groups (TiO6): benitoite, Ti-doped synthetic sapphire and spinel. Emission (under 254 nm shortwave excitation) and excitation spectra are provided, and fluorescence decay times are measured. It is proposed that BSL in beryl (morganite), dumortierite, hydrozincite, pezzotaite, tourmaline (elbaite), some silicates glasses, and synthetic opals is due to titanate groups present at a concentration of 20 ppmw Ti or above. They all share a broad emission with a maximum between 420 and 480 nm (2.95 to 2.58 eV) (thus perceived as blue), and an excitation spectrum peaking in the short-wave range, between 230 and 290 nm (5.39 to 4.27 eV). Furthermore, their luminescence decay time is about 20 microseconds (from 2 to 40). These three parameters are consistent with a titanate emission, and to our knowledge, no other activator.

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