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A series of RE(OH)SO4 layered compounds (RE = La-Tb lanthanides) were successfully synthesized via hydrothermal reaction under near-neutral solution pH and the mild temperature of 180 °C for 24 h, and the temperature/pH/time courses of phase/morphology evolution were clarified with RE = Tb for example. The compounds were characterized in detail for crystallite morphology, crystal structure, thermal behavior and vibrational property, and the intrinsic influence of lanthanide contraction was unveiled. Tb(OH)SO4 was analyzed to be isostructural with its La-Gd analogues (CN = 9 for Tb), instead of the reportedly Dy-Yb ones (CN = 8), and have parameters of a = 4.3806 Å, b = 12.1729 Å, c = 6.7674 Å and  = 106.3967° for its monoclinic unit cell (P21/n space group). The Eu and Tb compounds exhibited red (λex = 395 nm, λem = 616 nm) and green (λex = 369 nm, λem = 545 nm) emissions, and have fluorescence lifetimes of ~0.84 and 1.07 ms and chromaticity coordinates of around (0.632, 0.365) and (0.295, 0.481), respectively.

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• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

Keyword: RE(OH)SO4 , Crystal structure, Hydrothermal crystallization, Phase/morphology evolution

Date published: 2023-12-12

Publisher: Elsevier

Journal:

• Ceramics International (ISSN: 18733956) vol. 50 issue. 5 p. 7673-7681

Funding:

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4399

First published URL: https://doi.org/10.1016/j.ceramint.2023.12.091

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Updated at: 2025-12-12 08:30:42 +0900

Published on MDR: 2025-12-12 08:24:13 +0900