Results 201 to 210 of about 7,317 (263)
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Pb and rare earth element diffusion in xenotime
Lithos, 2006Abstract Diffusion of Pb and the rare earth elements Sm, Dy and Yb have been characterized in synthetic xenotime under dry conditions. The synthetic xenotime was grown via a Na2CO3–MoO3 flux method. The sources of diffusant for the rare earth diffusion experiments were REE phosphate powders, with experiments run using sources containing a single REE.
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American Mineralogist, 2023
We present in situ LA-ICP-MS U-Pb dating of xenotime and monazite in assemblages with native gold and Au (Ag) tellurides from the Xiaoqinling lode gold district in central China.
Wei Jian +8 more
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We present in situ LA-ICP-MS U-Pb dating of xenotime and monazite in assemblages with native gold and Au (Ag) tellurides from the Xiaoqinling lode gold district in central China.
Wei Jian +8 more
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Petrochronology Based on REE-Minerals: Monazite, Allanite, Xenotime, Apatite
Reviews in Mineralogy and Geochemistry, 2017Martin Engi
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Processing of xenotime concentrate
Hydrometallurgy, 1998Xenotime is a rare earth phosphate mineral which is a rich source of yttrium and heavy rare earths. Earlier experimental studies have been carried out in this laboratory on the chemical processing of hand-sorted xenotime obtained from the Bihar region to rare earth oxide intermediates.
Pamela Alex, A.K. Suri, C.K. Gupta
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Shocker: xenotime can date impacts
2023Constraining precise ages for impact events is crucial in establishing Earth’s history, and several geochronometers have been developed to date impacts. We present electron backscatter diffraction (EBSD), sensitive high-resolution ion microprobe (SHRIMP) and atom probe tomography (APT) data from shocked xenotime [(Y,HREE)PO4] collected from ...
Cilva Joseph +8 more
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Hydrothermal Synthesis of Xenotime‐Type Gadolinium Orthophosphate
Journal of the American Ceramic Society, 2002Xenotime‐type GdPO 4 (tetragonal, I 4 1 / amd ) has been synthesized hydrothermally at 400°C.
Celebi, AS, Kolis, JW
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A new calibrated strategy for in-situ U–Th–Pb dating of bastnasite by Xenotime
Journal of Analytical Atomic Spectrometry, 2022Bastnaesite becomes an important mineral geochronometer to record REE mineralization time for the REE deposits. As the only reliable primary standard for in-situ U–Th–Pb dating, bastnaesite K-9 is inhomogeneous and...
Yanwen Tang +7 more
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Xenotime at the Nanoscale: U‐Pb Geochronology and Optimisation of Analyses by Atom Probe Tomography
Geostandards and Geoanalytical Research, 2021Xenotime (YPO4) 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 ...
Cilva Joseph +5 more
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An empirical garnet (YAG) – xenotime thermometer
Contributions to Mineralogy and Petrology, 2000A pronounced negative correlation between the yttrium concentration in garnet ([Y]Grt) and temperature has been observed in xenotime (YPO4)-bearing metapelites from central New England, USA. The [Y]Grt decreases roughly two orders of magnitude (∼5500 to less than 100 ppm Y) over a 150 °C interval. A regression of ln([Y]Grt) against estimated reciprocal
Joseph M. Pyle, Frank S. Spear
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Melting Temperatures of Monazite and Xenotime
Journal of the American Ceramic Society, 1987The melting temperatures of natural and synthetic monazite and xenotime (rare‐earth ortnophosphates) were measured, using a heliostat‐type solar furnace. The results obtained are as follows: natural monazite from Japan (2057°40°C), synthetic monazite RPO 4 (R=La, 2072°20°C; R=Ce, 2045°20°C; R=
Yasuo Hikichi, Tsuyoshi Nomura
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