High-Pressure Low-Temperature Study of <i>Ln</i>Ca<sub>4</sub>O(BO<sub>3</sub>)<sub>3</sub> (<i>Ln</i> = Pr, Nd, Gd, Er, Tm)

We investigated the site-disorder and thermal expansion of <i>LnCa</i> <sub><i>4</i></sub> O(BO<sub>3</sub>)<sub>3</sub> (<i>Ln</i> = Pr, Nd, Gd, Er, Tm) through a single crystal structural study conducted between 100 and 300 K. Additionally, a high-pressure synchrotron X-ray diffraction study at low temperatures was conducted to determine the compressibility of both ordered and disordered prototype oxyborate lanthanides, specifically NdCa<sub>4</sub>O(BO<sub>3</sub>)<sub>3</sub> and ErCa<sub>4</sub>O(BO<sub>3</sub>)<sub>3</sub>. The study revealed distinct behaviors consistent with their respective ionic radii. Furthermore, satellite reflections at 50 K, along with the onset of a triple <i>a</i>-parameter in the Nd crystal, indicate that the ground state of this extensively studied family may be different from what was previously reported.

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Journal
ACS Omega
Published
2024-11-19
DOI
https://doi.org/10.1021/acsomega.4c07212
Primary Topic
Crystal Structures and Properties
Type
article
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article

High-Pressure Low-Temperature Study of LnCa4O(BO3)3 (Ln = Pr, Nd, Gd, Er, Tm)

Frederico Alabarse, Fatiha Azrour, Fapeng Yu, Jérôme Rouquette et al.
ACS Omega
Crystal Structures and Properties
article

High-Pressure Low-Temperature Study of LnCa4O(BO3)3 (Ln = Pr, Nd, Gd, Er, Tm)

Frederico Alabarse, Fatiha Azrour, Fapeng Yu, Jérôme Rouquette, Mickaël Beaudhuin, Dominique Granier, Jérôme Long, Shujun J. Zhang, Romain Viennois
article en

Abstract

We investigated the site-disorder and thermal expansion of <i>LnCa</i> <sub><i>4</i></sub> O(BO<sub>3</sub>)<sub>3</sub> (<i>Ln</i> = Pr, Nd, Gd, Er, Tm) through a single crystal structural study conducted between 100 and 300 K. Additionally, a high-pressure synchrotron X-ray diffraction study at low temperatures was conducted to determine the compressibility of both ordered and disordered prototype oxyborate lanthanides, specifically NdCa<sub>4</sub>O(BO<sub>3</sub>)<sub>3</sub> and ErCa<sub>4</sub>O(BO<sub>3</sub>)<sub>3</sub>. The study revealed distinct behaviors consistent with their respective ionic radii. Furthermore, satellite reflections at 50 K, along with the onset of a triple <i>a</i>-parameter in the Nd crystal, indicate that the ground state of this extensively studied family may be different from what was previously reported.

ACS OmegaVol. 9(48)
École Nationale Supérieure de Chimie de Montpellier (FR), Centre National de la Recherche Scientifique (FR), Shandong University (CN), Institut Universitaire de France (FR), Université de Montpellier (FR), University of Wollongong (AU), Elettra-Sincrotrone Trieste S.C.p.A. (IT), State Key Laboratory of Crystal Materials
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Crystal Structures and Properties
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High-Pressure Low-Temperature Study of <i>Ln</i>Ca<sub>4</sub>O(BO<sub>3</sub>)<sub>3</sub> (<i>Ln</i> = Pr, Nd, Gd, Er, Tm) — Frederico Alabarse, Fatiha Azrour, et al. · ACS Omega (2024) | TGRS Research Map | TGRS