Structural Form of Yttrium in Nanocrystalline Fluorapatite from Marine Sediments at 0.11 A Resolution.

ABSTRACT: Deep-sea mud is rich in rare earth elements and yttrium (REY), with yttrium (Y) exhibiting the highest concentration. REY are found in authigenic (a-CFA) and biogenic (b-CFA) carbonate fluorapatite (CFA, Ca₅(CO₃) _x (PO₄)_3-x F_1+x ). The presence of REY in both CFA types suggests different enrichment processes in abyssal environments, which may be traced through detailed structural analysis of REY's coordination chemistry. The bonding environment of Y in CFA was investigated in 2018 and 2023 using extended X-ray absorption fine structure (EXAFS) spectroscopy at a resolution of 0.15 Å. While these studies offered valuable insights into Y's short-range order, they also presented inconsistencies. Moreover, a

SUBMITTER: Manceau A 

PROVIDER: S-EPMC12529902 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature