Atom probe tomography analysis of the reference zircon gj-1: An interlaboratory study

Exertier, Florant; Fontaine, Alexandre; Corcoran, C.; Piazolo, Sandra; Белоусова, Е. А.; Peng, Zirong; Gault, Baptiste; Saxey, David W.; Fougerouse, Denis; Reddy, Steven M.; Pedrazzini, S.; Bagot, Paul A.J.; Moody, Michael P.; Langelier, Brian; Moser, D. E.; Botton, Gianluigi A.; Vogel, Florian; Thompson, GB; Blanchard, Paul T.; Chiaramonti, Ann N.; Reinhard, David A.; Rice, Katherine P.; Schreiber, Daniel K.; Kruska, Karen; Wang, J.; Cairney, Julie M.

doi:10.1016/j.chemgeo.2018.07.031

Cited by 31 publications

(13 citation statements)

References 56 publications

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“…Several recent studies have compared APT compositional results from geological samples with those from other geoanalytical techniques (Pérez‐Huerta et al , Daly et al , Exertier et al , Reinhard et al , Saxey et al ). Most comparisons provide excellent agreement, within the uncertainty arising from counting statistics in the atom probe data.…”

Section: Performance and Optimisationsmentioning

confidence: 99%

“…These above studies illustrated how APT could be applied to specific research problems. However, there is also an underlying need to better understand the systematics of atom probe data acquisition, ranging and reconstruction variables in geological materials and this has led to a number of papers dealing with APT optimisation in accessory phase analysis (La Fontaine et al , Blum et al , Exertier et al , Reinhard et al , Saxey et al , Verberne et al ).…”

Section: Geoscience Applicationsmentioning

confidence: 99%

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Atom Probe Tomography: Development and Application to the Geosciences

Reddy

Saxey

Rickard

et al. 2020

Geostandard Geoanalytic Res

101

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Atom probe tomography (APT) is an analytical technique that provides quantitative three‐dimensional elemental and isotopic analyses at sub‐nanometre resolution across the whole periodic table. Although developed and mostly used in the materials science and semiconductor fields, recent years have seen increasing development and application in the geoscience and planetary science disciplines. Atom probe studies demonstrate compositional complexity at the nanoscale and provide fundamental new insights into the atom‐scale mechanisms taking place in minerals over geological time. Here, we provide an overview of APT, including the historical development and technical aspects of the instrumentation, and the fundamentals of data acquisition, data processing and data reconstruction. We also review previous studies and highlight the potential future applications of nanoscale geochemical studies of natural materials.

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Section: Performance and Optimisationsmentioning

confidence: 99%

Section: Geoscience Applicationsmentioning

confidence: 99%

Atom Probe Tomography: Development and Application to the Geosciences

Reddy

Saxey

Rickard

et al. 2020

Geostandard Geoanalytic Res

101

View full text Add to dashboard Cite

show abstract

“…To investigate the APT performance with regard to quantification, the first important aspect is to appropriately identify the peaks in the mass spectrum [32,33]. Figure 2 shows three typical mass spectra, each containing 0.5-1×10 6 identified ions, with (a) HV pulsing and (b) laser pulsing at 10 pJ and (c) 70 pJ, respectively, obtained from the same APT specimen.…”

Section: Mass Spectramentioning

confidence: 99%

Quantification of solute deuterium in titanium deuteride by atom probe tomography with both laser pulsing and high-voltage pulsing: influence of the surface electric field

et al. 2019

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Atom probe tomography (APT) has been increasingly used to investigate hydrogen embrittlement in metals due to its unique capacity for direct imaging of H atoms interacting with microstructural features. The quantitativeness of hydrogen measurements by APT is yet to be established in views of erroneous compositional measurements of bulk hydrides and the influence of spurious hydrogen, e.g. residual gas inside the analysis chamber. Here, we analyzed titanium deuteride (approx. 65.0 at%-66.6 at% D) in lieu of hydride to minimize the overlap with residual gas, both with laser pulsing and highvoltage (HV) pulsing. Strategies were deployed to prevent H pick-up during specimen fabrication, including preparing specimens at cryogenic temperature. The measured composition of deuterium by APT with laser pulsing decreases significantly with the applied laser pulse energy, which is interpreted with regards to the strength of the corresponding surface electrostatic field, as assessed by the evolution of charge-state ratio. In contrast, compositional analyses with HV pulsing are roughly independent of the applied experimental parameters, although approx. 15 at%-20 at% off the nominal composition. Aided by plotting paired mass-to-charge correlations, the mechanisms of composition bias in both pulsing modes are discussed. A special emphasis is placed on the local variations of the measured composition as a function of the local electric field across the specimen's surface, which is not uniform due to asymmetric heat distribution related to the localized laser absorption and the faceted nature of surface caused by the crystallographic structure. Our investigations demonstrate the challenges of quantitative analysis of solute deuterium by APT but nevertheless provide insight to achieving the best possible experimental protocol.

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“…Being able to quantify the background level consistently is important as it has been demonstrated that these user‐dependent choices can affect the results within the same data set (Exertier et al . 2018). Instead, the background was estimated by a linear approximation of the background by defining a straight line using the background level before the 207 Pb 2+ peak from a range of 103.24 to 103.34 Da and after the 207 Pb 2+ peak from 103.775 to 103.875 Da range.…”

Section: Discussionmentioning

confidence: 99%

Xenotime at the Nanoscale: U‐Pb Geochronology and Optimisation of Analyses by Atom Probe Tomography

Joseph

Fougerouse

Saxey

et al. 2021

Geostandard Geoanalytic Res

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Xenotime (YPO 4 ) is an accessory phase common in low to high-temperature geological environments. Xenotime is an established geochronometer, though its small size, low modal abundance and textural complexity make it more difficult to analyse with traditional techniques but makes a prime candidate for nanoscale analysis. In this study, we develop an atom probe tomography (APT) protocol to determine the 206 Pb/ 238 U and 207 Pb/ 206 Pb ages of micro-scale xenotime crystals with analytical volumes four to six orders of magnitude smaller than typical geochronology techniques. A linear correlation between the 206 Pb/ 238 U fractionation and 238 UO 2 2+ / 238 UO 2+ was used to correct for the atom probe instrument parameters variability between specimens. For 207 Pb/ 206 Pb ages, we employed two methods of background correction owing to the 206 Pb 2+ thermal tail contribution to the 207 Pb 2+ counts: A constant background correction for the younger (~1000 Ma) Y1 reference material and a variable correction of background for Archaean age reference material xtc to correct for the thermal tail influence. This contribution also proposes strategies for optimisation of xenotime analysis using APT and permits us to explore the various geological problems in the nanoscale realm. This methodology potentially allows determining the age of small xenotime crystals in sedimentary rocks, low metamorphic grade settings and deformation microstructures.

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Atom probe tomography analysis of the reference zircon gj-1: An interlaboratory study

Abstract: This is a repository copy of Atom probe tomography analysis of the reference zircon gj-1: An interlaboratory study.

Cited by 31 publications

References 56 publications

Atom Probe Tomography: Development and Application to the Geosciences

Atom Probe Tomography: Development and Application to the Geosciences

Quantification of solute deuterium in titanium deuteride by atom probe tomography with both laser pulsing and high-voltage pulsing: influence of the surface electric field

Xenotime at the Nanoscale: U‐Pb Geochronology and Optimisation of Analyses by Atom Probe Tomography

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