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<p> <!--Query ID="Q1" Text="Please check and confirm if the authors and their respective affiliations have been correctly identified. Amend if necessary." Resolved="yes"-->Layered perovskite-like oxides with Ruddlesden-Popper (RP) phase structure are promising for high-technology industries, such as refractory, electronics, photonics, catalysis, and others. This work contributes to the advancement in the field of double-layered structures and reports a new double-layered compound La<sub>2</sub>BaLu<sub>2</sub>O<sub>7</sub>. It is formed during solid-state reaction at 1200&#xa0;°C through interaction of BaLu<sub>2</sub>O<sub>4</sub> perovskite-like precursor with La<sub>2</sub>O<sub>3</sub>. No difference in the formation mechanism of the target phase was found, when using either BaO<sub>2</sub> or BaCO<sub>3</sub> as a starting component. The unit cell of crystallized La<sub>2</sub>BaLu<sub>2</sub>O<sub>7</sub> has a tetragonal symmetry (S.G. P4<sub>2</sub>/mnm, (136)) with <i>a</i> = 6.04605 (65) Å, <i>c</i> = 20.8541 (44) Å, <i>V</i> = 762.32 (18) Å<sup>3</sup>, <i>Z</i> = 4. The space group was selected based on a comparison of pycnometric (<i>d</i><sub><i>m</i></sub> = 7.65 ± 0.05&#xa0;g /cm<sup>3</sup>) and X-ray (<i>d</i><sub>x</sub> = 7.64&#xa0;g /cm<sup>3</sup>) densities. Indication data of the new compound are presented. The previously reported group of double-layered RP phases La<sub>2</sub>BaFe<sub>2</sub>O<sub>7</sub>, La<sub>2</sub>BaIn<sub>2</sub>O<sub>7</sub>, La<sub>2</sub>BaSc<sub>2</sub>O<sub>7</sub>, La<sub>2</sub>BaMn<sub>2</sub>O<sub>7</sub> is supplemented by a new compound La<sub>2</sub>BaLu<sub>2</sub>O<sub>7</sub>. The findings of this study may enhance the knowledge on double-layered RP phase structures and their potential applications.</p>

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Synthesis of new n = 2 Ruddlesden-Popper compound La2BaLu2O7

  • 期刊论文

  • 发表日期：

    2025年2月11日

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  • Ekaterina A. Tugova,
  • Valentina Fedorovna Popova,
  • Dmitriy P. Romanov,
  • Maria V. Tomkovich,
  • Ashot G. Petrosyan

摘要

Layered perovskite-like oxides with Ruddlesden-Popper (RP) phase structure are promising for high-technology industries, such as refractory, electronics, photonics, catalysis, and others. This work contributes to the advancement in the field of double-layered structures and reports a new double-layered compound La2BaLu2O7. It is formed during solid-state reaction at 1200 °C through interaction of BaLu2O4 perovskite-like precursor with La2O3. No difference in the formation mechanism of the target phase was found, when using either BaO2 or BaCO3 as a starting component. The unit cell of crystallized La2BaLu2O7 has a tetragonal symmetry (S.G. P42/mnm, (136)) with a = 6.04605 (65) Å, c = 20.8541 (44) Å, V = 762.32 (18) Å3, Z = 4. The space group was selected based on a comparison of pycnometric (dm = 7.65 ± 0.05 g /cm3) and X-ray (dx = 7.64 g /cm3) densities. Indication data of the new compound are presented. The previously reported group of double-layered RP phases La2BaFe2O7, La2BaIn2O7, La2BaSc2O7, La2BaMn2O7 is supplemented by a new compound La2BaLu2O7. The findings of this study may enhance the knowledge on double-layered RP phase structures and their potential applications.