Changes in alkali-silicate glasses induced with electron irradiation

Gedeon, Ondrej; Zemek, J.; Jurek, K.

doi:10.1016/j.jnoncrysol.2006.12.125

Cited by 40 publications

(15 citation statements)

References 14 publications

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“…All glasses were clear with no inhomogeneities present when observed under a binocular microscope. Compositions were prepared at 10,15,17,20,23,27,30 and 35 mol% K 2 O with two separate preparations and analyses carried out on the 15 mol% K 2 O composition to check for reproducibility. Several attempts were made to synthesize a glass at 25 mol% K 2 O but a homogenous sample could not be obtained.…”

Section: Sample Preparationmentioning

confidence: 99%

“…17 O NMR experiments on CaSiO 3 glass [19] have demonstrated that BO and NBO alone could not provide charge balance to the system suggesting that small amounts of O 2− atoms were present. Other NMR experiments have indicated small amounts of O 2− in sodium and potassium silicate glasses containing lanthanum [18].…”

Section: A Third Type Of Oxygen O 2−mentioning

confidence: 99%

“…XPS has been used to study potassium silicate glasses as well. However, previous XPS studies have focused on the effects of irradiation with an electron beam [16,17] and the XPS spectra were of low resolution.…”

Section: Introductionmentioning

confidence: 99%

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High resolution X-ray Photoelectron Spectroscopy (XPS) study of K2O–SiO2 glasses: Evidence for three types of O and at least two types of Si

Sawyer

Nesbitt

Secco

2012

Journal of Non-Crystalline Solids

139

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Section: Sample Preparationmentioning

confidence: 99%

Section: A Third Type Of Oxygen O 2−mentioning

confidence: 99%

See 1 more Smart Citation

High resolution X-ray Photoelectron Spectroscopy (XPS) study of K2O–SiO2 glasses: Evidence for three types of O and at least two types of Si

Sawyer

Nesbitt

Secco

2012

Journal of Non-Crystalline Solids

139

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“…Concomitant to the loss of Alk + , important modifications of the glass network are generated: densification, surface reconstruction, precipitation of oxide phases, production of molecular oxygen are among the most recognized damage, e.g. [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Redox kinetics of iron in alkali silicate glasses exposed to ionizing beams: Examples with the electron microprobe

Fialin¹,

Wagner²

2012

Journal of Non-Crystalline Solids

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“…Gedeon et al, 2008). Most studies of this phenomenon have used samples of glass or halide salts, where the effect is most pronounced owing to the relatively weak bonding of alkali ions in the glass structure and greater proportion of non-bridging oxygens (Spray and Rae, 1995).…”

Section: Potential Mechanisms Of Damage In Sem Analysis and Fib Millingmentioning

confidence: 99%

Disturbance to the 40Ar/39Ar system in feldspars by electron and ion beam irradiation

et al. 2013

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The extent to which intracrystalline microtextures influence the diffusion of radiogenic Ar within alkali feldspars from slowly cooled igneous rocks is a long standing question in thermochronology. By combining highresolution electron microscopy with in-situ UV-laser ablation microprobe 40 Ar/ 39 Ar analysis the interplay of microtextures with isotope ages can be studied directly, enabling some of the assumptions underlying 40 Ar/ 39 Ar thermochronological techniques to be tested and allowing deduction of thermochronological and geological histories. However, there are numerous potential mechanisms by which a sample can be damaged and its Ar-isotope system disturbed by such microscopy techniques. To test this hypothesis, perthitic alkali feldspars from the 270-280 Ma Dartmoor Granite, UK, and gem-quality orthoclase from Itrongay, Madagascar (~470 Ma) were polished with colloidal silica or etched with hydrofluoric acid and irradiated with electrons and Ga + ions. The accelerating voltages and currents used were typical of those for electron beam imaging by scanning electron microscopy, X-ray analysis and mapping by electron probe, and for extraction of foils using the focused ion beam technique. No disturbance to the Ar-isotope system was observed for Ga + ion irradiation, or for low-resolution SEM imaging, but electron irradiation of small areas for long durations, as occurs during extended high-magnification SEM imaging, was found to disturb the Ar-isotope system over hundreds of micrometre sized areas by the addition of K and atmospheric Ar, producing anomalously young apparent 40 Ar/ 39 Ar ages. The best explanation for this age disturbance is electromigration of K and implantation of atmospheric Ar during sample charging.

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Changes in alkali-silicate glasses induced with electron irradiation

Cited by 40 publications

References 14 publications

High resolution X-ray Photoelectron Spectroscopy (XPS) study of K2O–SiO2 glasses: Evidence for three types of O and at least two types of Si

High resolution X-ray Photoelectron Spectroscopy (XPS) study of K2O–SiO2 glasses: Evidence for three types of O and at least two types of Si

Redox kinetics of iron in alkali silicate glasses exposed to ionizing beams: Examples with the electron microprobe

Disturbance to the 40Ar/39Ar system in feldspars by electron and ion beam irradiation

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