AT&amp;T IVES

Armstrong, Lisa

doi:10.1016/s1353-4858(98)90068-x

Cited by 13 publications

(21 citation statements)

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“…the electron beam penetration and the absorption of generated X-rays. Therefore we used a standard iterative ZAF (atomic number, absorption and fluorescence) correction procedure as implemented in the CITZAF package 15 to give accurate atomic concentrations, which are summarized in Table I. The quantitative result for the polished surface is in good agreement with the nominal atomic concentration (i.e.…”

Section: Edx Analysismentioning

confidence: 91%

Superconductivity induced by spark erosion inZrZn2

et al. 2005

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We show that the superconductivity observed recently in the weak itinerant ferromagnet ZrZn2 [C. Pfleiderer et al., Nature (London) 412, 58 (2001)] is due to remnants of a superconducting layer induced by spark erosion. Results of resistivity, susceptibility, specific heat and surface analysis measurements on high-quality ZrZn2 crystals show that cutting by spark erosion leaves a superconducting surface layer. The resistive superconducting transition is destroyed by chemically etching a layer of 5 µm from the sample. No signature of superconductivity is observed in ρ(T ) of etched samples at the lowest current density measured, J = 675 Am −2 , and at T ≥ 45 mK. EDX analysis shows that spark-eroded surfaces are strongly Zn depleted. The simplest explanation of our results is that the superconductivity results from an alloy with higher Zr content than ZrZn2.

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Section: Edx Analysismentioning

confidence: 91%

Superconductivity induced by spark erosion inZrZn2

et al. 2005

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“…Calibration standards used were well-characterized natural and synthetic materials, including YAG (Al, Y), wollastonite (Si), monazite (P), Fe 2 O 3 (Fe), CeAl 2 (Ce), REE silicate glasses (lanthanides except Ce), crocoite (Pb), Th metals (Th), and UO 2 (U). The CITZAF routine in the JEOL software, which is based on the Φ(ρZ) method, [14] was used for data processing. The results were corrected for rare-earth element (REE) peak overlaps.…”

Section: Methodsmentioning

confidence: 99%

Phase Decomposition upon Alteration of Radiation-Damaged Monazite–(Ce) from Moss, Østfold, Norway

Nasdala

Ruschel²,

Rhede³

et al. 2010

Chimia

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The internal textures of crystals of moderately radiation-damaged monazite-(Ce) from Moss, Norway, indicate heavy, secondary chemical alteration. In fact, the cm-sized specimens are no longer mono-mineral monazite but rather a composite consisting of monazite-(Ce) and apatite pervaded by several generations of fractures filled with sulphides and a phase rich in Th, Y, and Si. This composite is virtually a 'pseudomorph' after primary euhedral monazite crystals whose faces are still well preserved. The chemical alteration has resulted in major reworking and decomposition of the primary crystals, with potentially uncontrolled elemental changes, including extensive release of Th from the primary monazite and local redeposition of radionuclides in fracture fillings. This seems to question the general alteration-resistance of orthophosphate phases in a low-temperature, 'wet' environment, and hence their suitability as potential host ceramics for the long-term immobilisation of radioactive waste.

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“…The detection limit for Zr is about 45 lg g -1 and between 40 and 120 lg g -1 for the other elements measured. The CITZAF package (Armstrong 1995) was applied for automated matrix correction. During all analyses, Si was used as a monitoring element for identification of micro-inclusions such as zircon, which would yield measurements with anomalously high Zr contents.…”

Section: Electron Probe Microanalysismentioning

confidence: 99%

Rutile R632 – A New Natural Reference Material for U‐Pb and Zr Determination

Axelsson

Pape

Berndt

et al. 2018

Geostandard Geoanalytic Res

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A new natural rutile reference material is presented, suitable for U‐Pb dating and Zr‐in‐rutile thermometry by microbeam methods. U‐Pb dating of rutile R632 using laser ablation ICP‐MS with both magnetic sector field and quadrupole instruments as well as isotope dilution‐thermal ionisation mass spectrometry yielded a concordia age of 496 ± 2 Ma. The high U content (> 300 μg g−1) enabled measurement of high‐precision U‐Pb ages despite its young age. The sample was found to have a Zr content of 4294 ± 196 μg g−1, which makes it an excellent complementary reference material for Zr‐in‐rutile thermometry. Individual rutile grains have homogeneous compositions of a number of other trace elements including V, Cr, Fe, Nb, Mo, Sn, Sb, Hf, Ta and W. This newly characterised material significantly expands the range of available rutile reference materials relevant for age and temperature determinations.

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AT&T IVES

Cited by 13 publications

References 0 publications

Superconductivity induced by spark erosion inZrZn2

Superconductivity induced by spark erosion inZrZn2

Phase Decomposition upon Alteration of Radiation-Damaged Monazite–(Ce) from Moss, Østfold, Norway

Rutile R632 – A New Natural Reference Material for U‐Pb and Zr Determination

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