Results 71 to 80 of about 2,512,027 (122)

Assessment and Correction of Non‐Linearity Effects for In Situ Rb‐Sr Geochronology Applied to High 87Rb/86Sr Mica

Geostandards and Geoanalytical Research, Volume 50, Issue 3, Page 601-624, September 2026.
Key Points Measurement of 86Sr at count rates < 1500 cps can result in statistical bias. Non‐linear signals in analogue detection mode (e.g., Rb) present a challenge for accurately dating high 87Rb/86Sr mica (> 1000). Accounting for these considerations, high 87Rb/86Sr mica are dated here with accuracies of ∼ 1%.
Duane C. Petts, William J. Davis, Simon E. Jackson, Jamie A. Cutts, Janina Czas, Alfredo Camacho   +5 more
wiley   +1 more source

The influence of strontium content and sintering temperature on monazite stability [PDF]

Science of Sintering
This paper shows a simple way to synthesize a series of Ce1-xSrxPO4 ceramic materials using acetate solutions of Ce and Sr instead of nitrate which were used so far.
Mirković Miljana, Maletaškić Jelena, Butulija Svetlana, Anđelković Ljubica, Šuljagić Marija   +4 more
doaj   +1 more source

Resolving Micrometre‐Scale Zircon Growth in Silicic Systems by 7 μm LA‐MC‐ICP‐MS U‐Pb Dating: Linking Petrology and Geochronology in Silicic Volcanic and Granitic Rocks from Victoria, Australia

Geostandards and Geoanalytical Research, Volume 50, Issue 3, Page 625-647, September 2026.
Key Points 7 μm spot‐diameter LA‐MC‐ICP‐MS analyses yield accurate zircon U‐Pb ages. 1013 Ω amplifier resistors improve low‐signal Pb measurements. Saturn correction protocols minimise down‐hole fractionation effects. We present a systematic evaluation of high spatial‐resolution zircon U‐Pb dating using a Thermo Scientific Neoma multi‐collector ICP‐MS ...
Cristiano Lana, John D. Clemens
wiley   +1 more source

REE-bearing minerals in the Rapakavi Grante, Southern Finland

Open Geosciences, 2015
The studied rock samples belong to the classic1615–1645 Ma Wiborg Rapakivi granite terrane of southeasternFinland. Geochemical studies show that the rapakivigranites and associated rocks form metaluminousto peraluminous A-type granites and plot in the ...
Al-Ani Thair
doaj   +1 more source

Facile preparation of Ce enhanced vinyl-functionalized silica aerogel-like monoliths for selective separation of radioactive thorium from monazite

Materials & Design, 2020
Thorium (Th) is an associated ore of rare earth metals that is radioactive and harmful to the environment, but it is also a potential nuclear fuel replacement for uranium.
Hao Zhang, Fan Yang, Ruixi Bai, Zhigang Zhao, Chunqing Cai, Jianguo Li, Ying Ma   +6 more
doaj   +1 more source

Xenotime‐Type Rare‐Earth Orthophosphates REPO4 for Use as High‐Temperature Environmental Barrier Coatings

Journal of the American Ceramic Society, Volume 109, Issue 9, September 2026.
Can we make a more inexpensive and greener coating using naturally forming minerals? Xenotime mineral composition was determined to be (Y0.80Gd0.04Dy0.07Er0.05Yb0.04)PO4. Preliminary studies into REPO4 species showed compatable CTE match with SiC, formation of a multilayer reaction product that improves CMAS resistance, and parabolic growth rates ...
Imoen Hawthorne, William Riffe, Patrick E. Hopkins, Elizabeth Opila   +3 more
wiley   +1 more source

High-temperature thermal plasma treatment of monazite followed by aqueous digestion [PDF]

, 2016
Monazite is a chemically inert, radioactive phosphate mineral that contains the light rare earth metals (Ce, La, Nd, Pr and Y), thorium and uranium. A new process, which improves the extraction efficiency of monazite, is under development.
Cilliers, A.C., Kemp, D.
core   +1 more source

Interference of the Spectral Line Mζ in the M Energy Level Series of Ce on the F Element Kα Peak in Monazite Samples

Yankuang ceshi
Quantitative analysis of the ultra-light element fluorine (F) has always been one of the difficulties in electron probe microanalysis (EPMA). High-resolution qualitative analysis and proper subtraction of spectral interferences from major elements are ...
Suwen QIU, Jinsheng HU, Guangyu SHI, Can RAO, Xiaofeng ZHANG, Wentan XU   +5 more
doaj   +1 more source

SYNTAXY OF TITANITE, AEGIRINE AND ECKERMANNITE IN ALKALI SYENITE PEGMATITES OF THE VISHNEVYE MOUNTAINS (SOUTH URALS) [PDF]

Минералогия, 2016
Crystallographic orientation of titanite intergrowths with aegirine and eckermannite was found in alkali syenite pegmatites of the Vishnevye Mountains: the titanite face ( 1 11) is parallel to pyroxene and amphibole face (010) and the titanite face (110)
V.A. Popov, I.A. Blinov, V.I. Popova
doaj  

Timing and genesis of Cu-(Au) mineralization in the Khetri Copper Belt, northwestern India: constraints from in situ U-Pb ages and Sm-Nd isotopes of monazite-(Ce)

, 2018
The Khetri Copper Belt (KCB) in northwestern India contains several economically important hydrothermal Cu-(Au) deposits. Orebodies in these deposits are locally rich in monazite-(Ce).
Williams-Jones, A. E., Yang, Yue-Heng, Zhou, Mei-Fu, Li, Xiao-Chun, Gao, Jian-Feng   +4 more
core   +1 more source