Metamictization in zircon. Part I: Raman investigation following a Rietveld approach: Profile line deconvolution technique.

Presser, Volker

doi:10.1002/jrs.2155

Cited by 10 publications

(4 citation statements)

References 18 publications

(18 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…pseudo-Voigt) shapes. All measured signals consist of an overlap of the (predominantly Lorentzian) Raman band or PL line, and the (predominantly Gaussian) IPF, which, as an analytical artefact, results in artificial broadening of the spectroscopic signal (Nasdala et al 2001 ; Presser 2009 ). Measured FWHMs therefore were corrected mathematically for the IPF, and true FWHMs were calculated, using the empirical correction formula of Váczi ( 2014 ): …”

Section: Samples Preparation Irradiation and Analysesmentioning

confidence: 99%

Irradiation effects in monazite–(Ce) and zircon: Raman and photoluminescence study of Au-irradiated FIB foils

et al. 2018

View full text Add to dashboard Cite

Lamellae of 1.5 µm thickness, prepared from well-crystallised monazite–(Ce) and zircon samples using the focused-ion-beam technique, were subjected to triple irradiation with 1 MeV Au+ ions (15.6% of the respective total fluence), 4 MeV Au2+ ions (21.9%) and 10 MeV Au3+ ions (62.5%). Total irradiation fluences were varied in the range 4.5 × 1012 – 1.2 × 1014 ions/cm2. The highest fluence resulted in amorphisation of both minerals; all other irradiations (i.e. up to 4.5 × 1013 ions/cm2) resulted in moderate to severe damage. Lamellae were subjected to Raman and laser-induced photoluminescence analysis, in order to provide a means of quantifying irradiation effects using these two micro-spectroscopy techniques. Based on extensive Monte Carlo calculations and subsequent defect-density estimates, irradiation-induced spectroscopic changes are compared with those of naturally self-irradiated samples. The finding that ion irradiation of monazite–(Ce) may cause severe damage or even amorphisation, is in apparent contrast to the general observation that naturally self-irradiated monazite–(Ce) does not become metamict (i.e. irradiation-amorphised), in spite of high self-irradiation doses. This is predominantly assigned to the continuous low-temperature damage annealing undergone by this mineral; other possible causes are discussed. According to cautious estimates, monazite–(Ce) samples of Mesoproterozoic to Cretaceous ages have stored only about 1% of the total damage experienced. In contrast, damage in ion-irradiated and naturally self-irradiated zircon is on the same order; reasons for the observed slight differences are discussed. We may assess that in zircon, alpha decays create significantly less than 103 Frenkel-type defect pairs per event, which is much lower than previous estimates. Amorphisation occurs at defect densities of about 0.10 dpa (displacements per lattice atom).Electronic supplementary materialThe online version of this article (10.1007/s00269-018-0975-9) contains supplementary material, which is available to authorized users.

show abstract

Section: Samples Preparation Irradiation and Analysesmentioning

confidence: 99%

Irradiation effects in monazite–(Ce) and zircon: Raman and photoluminescence study of Au-irradiated FIB foils

et al. 2018

View full text Add to dashboard Cite

show abstract

“…8. Figure 5 shows a typical zircon Raman spectrum in the range of 180-1040 cm −1 along with a comparison between the observed profile and the actual sample contribution.…”

Section: Profile Line Deconvolutionmentioning

confidence: 99%

“…With increased structural damage to the crystal lattice, the shape and position of individual Raman active modes change in four ways: (1) the bands become broader, (2) they decrease in total Raman intensity, (3) they shift towards smaller wavenumbers and (4) they become asymmetric when amorphization reaches a critical level. [2,7,8] As zircons are not entirely opaque but often highly transparent, the vertical sampling depth is a critical factor to consider when performing a (semi-)quantitative description of metamictization using Raman spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Metamictization in zircon: Raman investigation following a Rietveld approach. Part II: Sampling depth implication and experimental data

Presser

Glotzbach

2008

J Raman Spectroscopy

Self Cite

View full text Add to dashboard Cite

Profile line deconvolution following a Rietveld approach is applied to Raman spectra obtained from natural zircon grains from the European Alps. The corrected bandwidths are in perfect agreement with the values obtained from an established correction method (after Irmer) as far as the area of validity of the latter is concerned. For Raman active modes smaller than that, the Rietveld approach also yields accurate values for the true Raman bandwidth. Moreover, changes to instrument parameters are compensated by the correction routine. As for the studied zircon grains, Raman spectroscopy was shown to be a suitable tool for the examination of zoning (i.e. regions which show a variable degree of radiation-induced damage because of a different amount of incorporated uranium and/or thorium). This is complicated by the fact that the measured Raman signal is not restricted to the depth expected from the axial resolution (several micrometers) but a significant contribution comes from a comparatively large excitation volume (tens of micrometer deep). This sampling volume, however, lies within the same order of magnitude as zoning, which itself is blurred by the range of amorphization-causing alpha-particles.

show abstract

“…[169] The vibrational structure of the uranyl phosphate mineral dumontite Pb 2 (UO2) 3 O 2 (PO4) 2 ·5H 2 O was characterized using Raman spectroscopy by Frost and Cejka. [170] Presser [171] published part I of a paper dealing with the metamictization in zircon. The Raman investigation followed a Rietveld approach using a line profile/line deconvolution technique.…”

Section: Mineralsmentioning

confidence: 99%

Recent advances in linear and nonlinear Raman spectroscopy. Part IV

Nafie

2010

J Raman Spectroscopy

View full text Add to dashboard Cite

The purpose of the review is to provide a concise overview of recent advances in the broadly defined field of Raman spectroscopy as reflected in part by the many articles published each year in the Journal of Raman Spectroscopy (JRS) as well as in trends across all related journals publishing in this research area. Context for the review is provided by considering statistical data on citations for the Thompson Reuters ISI Web of Science by year and by subfield of Raman spectroscopy. Additional statistics of number of papers and posters presented by category at the XXII International Conference on Raman Spectroscopy (ICORS 2010) is also provided. Papers published in JRS in 2009, as reviewed here, reflect trends at the cutting edge of Raman spectroscopy which is expanding rapidly as a sensitive photonic probe of matter at the molecular level with an ever widening sphere of novel applications.

show abstract

Metamictization in zircon. Part I: Raman investigation following a Rietveld approach: Profile line deconvolution technique.

Cited by 10 publications

References 18 publications

Irradiation effects in monazite–(Ce) and zircon: Raman and photoluminescence study of Au-irradiated FIB foils

Irradiation effects in monazite–(Ce) and zircon: Raman and photoluminescence study of Au-irradiated FIB foils

Metamictization in zircon: Raman investigation following a Rietveld approach. Part II: Sampling depth implication and experimental data

Recent advances in linear and nonlinear Raman spectroscopy. Part IV

Contact Info

Product

Resources

About