Results 21 to 30 of about 7,317 (263)

Comparative Binding Studies of the Chelators Methylolanthanin and Rhodopetrobactin B to Lanthanides and Ferric Iron. [PDF]

Chembiochem
The synthesis and the investigation of the lanthanide (Ln) and Fe‐binding properties of the putative lanthanophore methylolanthanin (MLL) and the siderophore rhodopetrobactin B (RPB B) are reported. While both chelators bind Lns, they unexpectedly precipitate with Lns under biologically relevant conditions and thereby challenge the proposed classic ...
Gutenthaler-Tietze SM, Mertens M, Phi MT, Weis P, Drobot B, Köhrer A, Steudtner R, Karst U, Martinez-Gomez NC, Daumann LJ.   +9 more
europepmc   +2 more sources

Investigation of Thermoluminescence Characteristics and Kinetics of Natural Obsidian. [PDF]

Luminescence
Thermoluminescence (TL) properties of natural obsidian from the Aksaray region were investigated under beta irradiation. The study identifies optimal grain size, evaluates kinetic parameters via Tm–Tstop and computerized glow curve deconvolution (CGCD) methods, and demonstrates the material's potential for low‐dose environmental and personal radiation ...
Avci H.
europepmc   +2 more sources

Helium Diffusion in Natural Xenotime [PDF]

Geochemistry, Geophysics, Geosystems, 2019
AbstractThe typically high U and Th contents of xenotime ([Y,HREE]PO4) make this accessory mineral a promising candidate for (U‐Th)/He thermochronometry if the 4He diffusivity can be constrained well enough to estimate its closure temperature. We report new results for two 4He step‐heating experiments on different‐sized fragments of a natural xenotime ...
Alyssa J. Anderson, Kip V. Hodges, Matthijs C. van Soest, John M. Hanchar   +3 more
openaire   +1 more source

Timing of diagenesis and very low-grade metamorphism in the eastern sector of the Sierra de Cameros (Iberian Range, Spain): a U–Pb SHRIMP study on monazite [PDF]

, 2009
The Sierra de Cameros is an intracontinental orogen and represents the north-western part of the Iberian Range in Northern Spain. It comprises a thick sequence of syn-rift continental sediments (mainly sandstones and carbonates) deposited during ...
Aleinikoff, Bollinger, Cabella, Casas-Sainz, Casquet, Cherniak, Del Río, Evans, Evans, Frantz, Förster, Gabudianu Radulescu, Gil-Imaz, Goldberg, Janots, Janots, Kempe, Krenn, Lanzirotti, Lev, Mantilla-Figueroa, Mas, Masuda, Mata, Mata, Mata, Milodowski, Montel, Pan, Pan, Parrish, Rasmussen, Rasmussen, Rasmussen, Rubatto, Sawka, Smith, Spear, Tera, Tischer, Wilby, Williams, Wing   +42 more
core   +2 more sources

A Spectroscopic Investigation of Eu3+ Incorporation in LnPO4 (Ln = Tb, Gd1-xLux, X = 0.3, 0.5, 0.7, 1) Ceramics

Frontiers in Chemistry, 2019
We have investigated the incorporation of the luminescent Eu3+ cation in different LnPO4 (Ln = Tb, Gd1−xLux, x = 0.3, 0.5, 0.7, 1) host phases. All samples were analyzed with powder X-ray diffraction (PXRD), Raman spectroscopy, and site-selective time ...
Henry Lösch, Antje Hirsch, Jacqueline Holthausen, Lars Peters, Bin Xiao, Stefan Neumeier, Moritz Schmidt, Nina Huittinen   +7 more
doaj   +1 more source

Hydrothermal formation of heavy rare earth element (HREE)– xenotime deposits at 100 °C in a sedimentary basin [PDF]

, 2018
Most rare earth element deposits form from magmatic fluids, but there have also been discoveries of heavy rare earth element (HREE)– enriched hydrothermal xenotime deposits within sedimentary basins.
Atanasova, P, Banks, DA, Diamond, LW, Gutzmer, J, Richter, L   +4 more
core   +2 more sources

Hellandite-(Y)–hingganite-(Y)–fluorapatite retrograde coronae: a novel type of fluid-induced dissolution–reprecipitation breakdown of xenotime-(Y) in the metagranites of Fabova Hoľa, Western Carpathians, Slovakia

Mineralogical magazine, 2022
Two contrasting reaction coronae were developed around rare earth element (REE) accessory phosphates in Variscan metagranitic rocks, which have been overprinted by Alpine blastomylonitisation from the Fabova Hol'a Massif, in the Veporic Unit, Western ...
M. Ondrejka, Alexandra Molnárová, M. Putiš, P. Bačík, P. Uher, Bronislava Voleková, S. Milovská, T. Mikuš, L. Pukančík   +8 more
semanticscholar   +1 more source

Occurrence and behavior of monazite-(Ce) and xenotime-(Y) in detrital and saprolitic environments related to the Serra Dourada granite, Goiás/Tocantins State, Brazil: Potential for REE deposits [PDF]

, 2015
This is the author's post-print and is released with a Creative Commons Attribution Non-Commercial No Derivatives License.The definitive published version is available from Elsevier via http://dx.doi.org/10.1016/j.gexplo.2015.03.007 © 2015 Elsevier B.V.
Botelho, NF, Santana, IV, Wall, F
core   +1 more source

Application of Eh-pH Diagrams on Acid Leaching Systems for the Recovery of REEs from Bastnaesite, Monazite and Xenotime

Metals, 2021
Bastnaesite, monazite and xenotime are rare earth minerals (REMs) that are typical sources for rare earth elements (REEs). To advance the understanding of their leaching and precipitation behavior in different hydrometallurgical processes, Eh-pH diagrams
Peijia Lin, Xinbo Yang, J. Werner, R. Honaker   +3 more
semanticscholar   +1 more source

Phase Transformation Pathway of DyPO₄ to 21.5 GPa

Crystals, 2023
Interest in the deformation behavior and phase transformations of rare earth orthophosphates (REPO4s) spans several fields of science—from geological impact analysis to ceramic matrix composite engineering.
Jai Sharma, Henry Q. Afful, Corinne E. Packard   +2 more
doaj   +1 more source