Structural Form of Yttrium in Nanocrystalline Fluorapatite from Marine Sediments at 0.11 Å Resolution
Year: 2025
Type: article
Abstract: in an amorphous phase surrounding the a-CFA and b-CFA nanocrystals and is secondarily incorporated into the crystal structure of a-CFA. There is no EXAFS evidence indicating the presence of polynuclear Y precipitate, which contrasts with a recent finding on cerium (Ce), nor supporting the formation of a Y-carbonate complex. The latter two findings are backed by density functional theory, which indicates that Y-Y pair formation is thermodynamically unfavorable and that the predicted Y-C distance is inconsistent with the EXAFS distances. This research highlights the geochemical enrichment of Y in abyssal sediments through the formation of a hydrated yttrium-calcium phosphate phase in a-CFA and b-CFA and Y for Ca substitution in authigenic a-CFA nanocrystals during the coprecipitation of calcium and phosphate.
Source: Chemistry of Materials
Institutions: École Normale Supérieure de Lyon, Centre National de la Recherche Scientifique, European Synchrotron Radiation Facility, Laboratoire de Chimie, Institut des Matériaux Jean Rouxel, Nantes Université, Institut des Sciences de la Terre, Université Grenoble Alpes, Institut des Géosciences de l'Environnement, Guangzhou Marine Geological Survey, Constructor University
Language: English
Subfield: Geochemistry and Petrology
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
OpenAlex ID: W4414601998