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photoluminescence

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Journal Article

A photoluminescence study of REE 3+ emissions in radiation-damaged zircon Open Access

Christoph Lenz, Lutz Nasdala
Published: 01 May 2015
American Mineralogist (2015) 100 (5-6): 1123–1133.
DOI: https://doi.org/10.2138/am-2015-4894CCBYNCND
...Christoph Lenz; Lutz Nasdala Abstract A series of natural zircon samples (with U concentrations of 140–2600 ppm and ranging from well crystalline to severely radiation damaged) were investigated by means of REE 3+ photoluminescence spectroscopy. We found systematic changes in REE 3+ emissions...
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Journal Article

Structure and photoluminescence of composites based on CdS enclosed in magadiite Available to Purchase

Yufeng Chen, Gensheng Yu, Fei Li, Junchao Wei
Published: 01 February 2013
Clays and Clay Minerals (2013) 61 (1): 26–33.
DOI: https://doi.org/10.1346/CCMN.2013.0610103
... composite, along with the modification of the optical properties of CdS by the host magadiite. 17 09 2012 12 2012 © 2013 Clay Mineral Society 2013 CdS Nanoparticles Composites Magadiite Photoluminescence Magadiite (Na 2 Si 14 O 29 · x H 2 O) belongs to the family of layered...
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View PDF for article title, Structure and <span class="search-highlight">photoluminescence</span> of composites based on CdS enclosed in magadiite
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Journal Article

Generation history of carbonado inferred from photoluminescence spectra, cathodoluminescence imaging, and carbon-isotopic composition Available to Purchase

Hiroyuki Kagi, Shuichi Sato, Tasuku Akagi, Hisao Kanda
Published: 01 January 2007
American Mineralogist (2007) 92 (1): 217–224.
DOI: https://doi.org/10.2138/am.2007.1957
...Hiroyuki Kagi; Shuichi Sato; Tasuku Akagi; Hisao Kanda Abstract Carbonado diamonds from the Central African Republic were investigated using spectroscopic observations and C-isotopic analysis. Based on photoluminescence (PL) spectra, carbonado samples were classified into two groups: Group-A, which...
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View PDF for article title, Generation history of carbonado inferred from <span class="search-highlight">photoluminescence</span> spectra, cathodoluminescence imaging, and carbon-isotopic composition
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Journal Article

Fluorescence (photoluminescence) of carbonate rocks; instrumental and analytical sources of observational error Available to Purchase

Karen Rose Cercone, Vicki A. Pedone
Published: 01 July 1987
Journal of Sedimentary Research (1987) 57 (4): 780–782.
DOI: https://doi.org/10.1306/212F8C42-2B24-11D7-8648000102C1865D
View PDF for article title, Fluorescence (<span class="search-highlight">photoluminescence</span>) of carbonate rocks; instrumental and analytical sources of observational error
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Journal Article

Activation of photoluminescence in artificial calcite by stannous ion Available to Purchase

Stewart J. Carlson
Published: 01 June 1955
American Mineralogist (1955) 40 (5-6): 540–542.
View PDF for article title, Activation of <span class="search-highlight">photoluminescence</span> in artificial calcite by stannous ion
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Journal Article

Opals from Slovakia (“Hungarian” opals) : a re-assessment of the conditions of formation Available to Purchase

Benjamin RONDEAU, Emmanuel FRITSCH, Michel GUIRAUD, Christophe RENAC
Published: 01 September 2004
European Journal of Mineralogy (2004) 16 (5): 789–799.
DOI: https://doi.org/10.1127/0935-1221/2004/0016-0789
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View PDF for article title, Opals from Slovakia (“Hungarian” opals) : a re-assessment of the conditions of formation
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Photoluminescence and photoluminescence excitation spectra of bulk (solid lines) and nanocrystalline (dashed lines) ZnS:Mn. [Used with permission of American Physical Society, from Bhargava et al. (1994), Physical Review Letters, Vol. 72, Fig. 1, p. 4162.]

Photoluminescence and photoluminescence excitation spectra of bulk (solid l... Available to Purchase

Published: 01 January 2006
Figure 30. Photoluminescence and photoluminescence excitation spectra of bulk (solid lines) and nanocrystalline (dashed lines) ZnS:Mn. [Used with permission of American Physical Society, from Bhargava et al. (1994) , Physical Review Letters, Vol. 72, Fig. 1, p. 4162.]
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Photoluminescence (PL) spectra measured in core (a) and middle (b) zones of sample HI-180 at different excitation wavelengths. Symbol R marks diamond Raman peaks. The spectra are shifted along the vertical axis for better illustration.

Photoluminescence (PL) spectra measured in core ( a ) and middle ( b ) zone... Open Access

Published: 01 January 2025
Fig. 8. Photoluminescence (PL) spectra measured in core ( a ) and middle ( b ) zones of sample HI-180 at different excitation wavelengths. Symbol R marks diamond Raman peaks. The spectra are shifted along the vertical axis for better illustration.
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Photoluminescence (PL) spectra measured in core (a) and rim (b) zones of sample HLS-4 at excitation wavelength 395 nm.

Photoluminescence (PL) spectra measured in core ( a ) and rim ( b ) zones o... Open Access

Published: 01 January 2025
Fig. 9. Photoluminescence (PL) spectra measured in core ( a ) and rim ( b ) zones of sample HLS-4 at excitation wavelength 395 nm.
Image
Photoluminescence associated with the web-like dislocation network in a perfectly colourless natural type IIa diamond. 220-nm UV excitation, image width = 0.75 mm.

Photoluminescence associated with the web-like dislocation network in a per... Available to Purchase

Published: 01 October 2024
Photoluminescence associated with the web-like dislocation network in a perfectly colourless natural type IIa diamond. 220-nm UV excitation, image width = 0.75 mm.
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Parallel polarized Raman spectra of E2335 titanite measured on heating from RT to 800 K. The signals near 1045, 1090, and 1180 cm−1 are photoluminescence peaks. The band near 880 cm−1 results from overlapping Raman and photoluminescence signals.

Parallel polarized Raman spectra of E2335 titanite measured on heating from... Available to Purchase

Published: 01 February 2014
Fig. 3 Parallel polarized Raman spectra of E2335 titanite measured on heating from R T to 800 K. The signals near 1045, 1090, and 1180 cm −1 are photoluminescence peaks. The band near 880 cm −1 results from overlapping Raman and photoluminescence signals.
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Typical photoluminescence spectra of diamonds obtained in experiments on the redox (Fe,Ni)–(Mg,Ca)CO3 interaction: a, b – diamonds crystallized in the carbonate melt at 1400 and 1550 °C, respectively; c, d – diamonds crystallized in a metal melt at 1400 and 1550 °C, respectively. The spectra are measured at 80 K with excitation at 395 nm. The spectra are shifted along the vertical axis for clarity. RS – Line of Raman scattering of diamond.

Typical photoluminescence spectra of diamonds obtained in experiments on th... Open Access

Published: 01 August 2023
Fig. 12. Typical photoluminescence spectra of diamonds obtained in experiments on the redox (Fe,Ni)–(Mg,Ca)CO 3 interaction: a , b – diamonds crystallized in the carbonate melt at 1400 and 1550 °C, respectively; c , d – diamonds crystallized in a metal melt at 1400 and 1550 °C
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Photoluminescence (PL) spectrum for diamond U-331/112, T = 800 K (A); a fragment of the PL spectrum with details of fine structure (B). 1, 2, yellow (1) and green (2) photoluminescence for the samples U-331/112 and U-331/113, respectively; 3, differential spectrum.

Photoluminescence (PL) spectrum for diamond U-331/112, T = 800 K ( A ); a... Available to Purchase

Published: 01 January 2015
Fig. 14. Photoluminescence (PL) spectrum for diamond U-331/112, T = 800 K ( A ); a fragment of the PL spectrum with details of fine structure ( B ). 1 , 2 , yellow ( 1 ) and green ( 2 ) photoluminescence for the samples U-331/112 and U-331/113, respectively; 3 , differential spectrum.
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Photoluminescence spectra of fluorcarletonite (curve 1) and carletonite (curve 2) under 330 nm excitation and excitation spectra of fluorcarletonite (curve 3) and carletonite (curve 4) monitored at 400 nm.

Photoluminescence spectra of fluorcarletonite (curve 1) and carletonite (cu... Available to Purchase

Published: 03 March 2023
Figure 7. Photoluminescence spectra of fluorcarletonite (curve 1) and carletonite (curve 2) under 330 nm excitation and excitation spectra of fluorcarletonite (curve 3) and carletonite (curve 4) monitored at 400 nm.
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Photoluminescence spectra of turkestanite (1) and steacyite (2) under 405 nm excitation. Excitation spectra of uranyl ions (UO2)2+ in turkestanite (3) and steacyite (4) monitored at 520 nm. All spectra were measured at 90 K.

Photoluminescence spectra of turkestanite (1) and steacyite (2) under 405 n... Available to Purchase

Published: 19 January 2023
Fig. 6. Photoluminescence spectra of turkestanite (1) and steacyite (2) under 405 nm excitation. Excitation spectra of uranyl ions (UO 2 ) 2+ in turkestanite (3) and steacyite (4) monitored at 520 nm. All spectra were measured at 90 K.
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a) For below-band gap photoluminescence, the energy of the incoming photon (hni) is enough to excite an electron from a defect’s ground state (GS) to its excited state (ES): the defect subsequently emits a lower-energy photon (hne). b) For cathodoluminescence, a high-energy electron excites an electron to the conduction band. The electron is then trapped by the excited state of a defect which subsequently emits.

a) For below-band gap photoluminescence, the energy of the incoming photon... Open Access

Published: 01 July 2022
Figure 16. a) For below-band gap photoluminescence, the energy of the incoming photon (hn i ) is enough to excite an electron from a defect’s ground state (GS) to its excited state (ES): the defect subsequently emits a lower-energy photon (hn e ). b) For cathodoluminescence, a high-energy
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Photoluminescence spectroscopy reveals that unstable defects are removed by HPHT treatment of Type IIa brown diamonds to decolorize them. In addition, the NV–/NV0 ratio increases to &gt;1 in treated diamonds (as measured with PL using a 514 nm laser). The H2 defect is rare in untreated natural samples and can be used in combination with other spectroscopic markers to identify treated diamonds. Spectra collected with the samples at 80 K.

Photoluminescence spectroscopy reveals that unstable defects are removed by... Open Access

Published: 01 July 2022
Figure 40. Photoluminescence spectroscopy reveals that unstable defects are removed by HPHT treatment of Type IIa brown diamonds to decolorize them. In addition, the NV – /NV 0 ratio increases to >1 in treated diamonds (as measured with PL using a 514 nm laser). The H2 defect is rare
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Photoluminescence spectra for as-grown (bottom) and HPHT annealed (top) CVD diamonds collected using 514 nm laser excitation at 77 K. Nitrogen-vacancy and silicon-vacancy centers are observed for both. SiV– is often detected for CVD diamonds, yet extremely rare for natural diamonds (&lt;1%), making it a good indicator for synthesis. The as-grown CVD diamond also shows a CVD-specific unassigned doublet emission at 596/597 nm. HPHT treatment removes this feature, but introduces a series of sharp peaks in the 520–580 nm region. The peak labelled R is the intrinsic diamond Raman peak.

Photoluminescence spectra for as-grown ( bottom ) and HPHT annealed ( top )... Open Access

Published: 01 July 2022
Figure 42. Photoluminescence spectra for as-grown ( bottom ) and HPHT annealed ( top ) CVD diamonds collected using 514 nm laser excitation at 77 K. Nitrogen-vacancy and silicon-vacancy centers are observed for both. SiV – is often detected for CVD diamonds, yet extremely rare for natural
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Excitation spectrum of photoluminescence monitored at 625 nm (16,000 cm–1) at 77 K.

Excitation spectrum of photoluminescence monitored at 625 nm (16,000 cm –1 ... Available to Purchase

Published: 10 December 2021
Fig. 9. Excitation spectrum of photoluminescence monitored at 625 nm (16,000 cm –1 ) at 77 K.
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Photoluminescence spectrum of sapozhnikovite excited by 405 nm (24,690 cm–1) radiation at 77 K.

Photoluminescence spectrum of sapozhnikovite excited by 405 nm (24,690 cm –... Available to Purchase

Published: 10 December 2021
Fig. 8. Photoluminescence spectrum of sapozhnikovite excited by 405 nm (24,690 cm –1 ) radiation at 77 K.