Results 211 to 220 of about 45,988 (266)
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Contributions to Mineralogy and Petrology, 2007
Diffusion of Li under anhydrous conditions at 1 atm and under fluid-present elevated pressure (1.0–1.2 GPa) conditions has been measured in natural zircon. The source of diffusant for 1-atm experiments was ground natural spodumene, which was sealed under vacuum in silica glass capsules with polished slabs of zircon.
D.J. Cherniak, E.B. Watson
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Diffusion of Li under anhydrous conditions at 1 atm and under fluid-present elevated pressure (1.0–1.2 GPa) conditions has been measured in natural zircon. The source of diffusant for 1-atm experiments was ground natural spodumene, which was sealed under vacuum in silica glass capsules with polished slabs of zircon.
D.J. Cherniak, E.B. Watson
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Zircon Synthesis and the Properties of Zircon-Based Luminophores
Glass and Ceramics, 2016The conditions for the synthesis of zircon crystals from a fluxed solution are studied. It is proposed that CaCl2 be used as flux. Samples of luminescent zircon are obtained with activation by Dy3+ and Eu3+ ions. The luminescence properties of the materials obtained are investigated and the luminescence spectra of pure zircon (synthesized using Li2MoO4
V. Kh. Kim +4 more
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Nuclear Tracks and Radiation Measurements (1982), 1985
Abstract The TL emission in many zircons is zoned. Because regions of bright TL emission are anti-correlated with regions of high uranium content, age determination by conventional methods give TL dates which are too low. We designed an image intensifier based TL system capable of resolving features on a 5 micron scale during heating in order to ...
R.H. Templer, A.J. Walton
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Abstract The TL emission in many zircons is zoned. Because regions of bright TL emission are anti-correlated with regions of high uranium content, age determination by conventional methods give TL dates which are too low. We designed an image intensifier based TL system capable of resolving features on a 5 micron scale during heating in order to ...
R.H. Templer, A.J. Walton
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Structure and Chemistry of Zircon and Zircon-Group Minerals
Reviews in Mineralogy and Geochemistry, 2003Zircon (ZrSiO4) is a common accessory mineral in nature, occurring in a wide variety of sedimentary, igneous, and metamorphic rocks. Known to incorporate an assortment of minor and trace elements, zircon has the ability to retain substantial chemical and isotopic information, leading to its use in a wide range of geochemical investigations, including ...
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Proceedings, annual meeting, Electron Microscopy Society of America, 1982
The phenomenon of radiation damage in minerals is of interest because of its bearing on both radioactive waste disposal and the determination of geological age. It is important to understand the defects produced in minerals at the different stages of structural damage by radiation.
Ignatius Y. Chan, Peter R. Buseck
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The phenomenon of radiation damage in minerals is of interest because of its bearing on both radioactive waste disposal and the determination of geological age. It is important to understand the defects produced in minerals at the different stages of structural damage by radiation.
Ignatius Y. Chan, Peter R. Buseck
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1990
This review paper deals with the synthesis of both zircon powders and single crystals. Zircon powders can be prepared by solid state dry firing and hydrothermal reaction; solution-sol-gel derived powders can be combined with both methods. Of the various combinations, the hydrothermal method is the best for obtaining fine (~75 nm) powders at a ...
Sridhar Komarneni, Rustum Roy
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This review paper deals with the synthesis of both zircon powders and single crystals. Zircon powders can be prepared by solid state dry firing and hydrothermal reaction; solution-sol-gel derived powders can be combined with both methods. Of the various combinations, the hydrothermal method is the best for obtaining fine (~75 nm) powders at a ...
Sridhar Komarneni, Rustum Roy
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Dielectric Properties of Lead Zirconate and Barium‐Lead Zirconate
Journal of the American Ceramic Society, 1950Methods are described for preparing lead zirconate and mixtures of lead and barium zirconate in ceramic form. These compositions are shown to constitute a new class of ferroelectric materials having dielectric constants as high as 11,000. Dielectric constants are measured at 1 mc. per second in a temperature range 25° to 350° C.
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Geological Magazine, 1936
WHILST working through a batch of slides of heavy minerals of the Millstone Grit of the Pennine region some interesting outgrowths on zircon have been noticed which are worthy of record. The writer is not aware that they have been recorded before, but they must have a wider distribution than the Millstone Grit of this area, and therefore this mention ...
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WHILST working through a batch of slides of heavy minerals of the Millstone Grit of the Pennine region some interesting outgrowths on zircon have been noticed which are worthy of record. The writer is not aware that they have been recorded before, but they must have a wider distribution than the Millstone Grit of this area, and therefore this mention ...
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Diffusion anisotropy of Ti in zircon and implications for Ti-in-zircon thermometry
Earth and Planetary Science Letters, 2022Matthew Newville +2 more
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