Phase stability of solid solution La1-xRxRh3B (R = Gd, Lu and Sc) compounds with cubic anti-perovskite type structure

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences Pub Date : 2024-10-23 DOI:10.1016/j.solidstatesciences.2024.107731

Kunio Yubuta , Akiko Nomura , Kaoru Kouzu , Takao Mori , Shigeru Okada , Toetsu Shishido

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Abstract

We have investigated the solid solution range of single phase La_1-xR_xRh₃B (R = Gd, Lu and Sc) compounds with a cubic anti-perovskite type structure. The behaviors of lattice parameters, hardness, and thermogravimetry–differential thermal analysis (TG-DTA) were also investigated. The cubic anti-perovskite phase exists over the entire composition range x from 0.0 to 1.0 for all La-Gd, La-Lu and La-Sc systems. Both the lattice parameters and the hardness in all La-Gd, La-Lu and La-Sc systems show a linear dependence on the degree of the substitution x of La atom. The results of TG-DTA measurements indicate that oxidation of the compounds in air begins at about 500–600 K. The mixed phases of RBO₃, R₂O₃ and Rh are identified as oxidized products around x = 0.4 to 0.6 composition. The oxidation onset temperature, and weight gains due to the oxidation depend on the degree of substitution x. The behavior of crystallographic and physical/chemical properties in the present compounds La_1-xR_xRh₃B strongly depend on the atomic size of the rare-earth atoms that form the cubic framework.

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具有立方反超晶型结构的固溶体 La1-xRxRh3B（R = Gd、Lu 和 Sc）化合物的相稳定性

我们研究了具有立方反超晶型结构的单相 La1-xRxRh3B（R = Gd、Lu 和 Sc）化合物的固溶体范围。同时还研究了晶格参数、硬度和热重-差热分析（TG-DTA）的行为。在所有 La-Gd、La-Lu 和 La-Sc 系统中，立方反超晶相存在于 0.0 至 1.0 的整个成分范围 x 中。所有 La-Gd、La-Lu 和 La-Sc 系统的晶格参数和硬度都与 La 原子的替代程度 x 呈线性关系。TG-DTA 测量结果表明，这些化合物在空气中的氧化始于约 500-600 K。本化合物 La1-xRxRh3B 的晶体学行为和物理/化学特性在很大程度上取决于构成立方框架的稀土原子的原子尺寸。

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来源期刊

Solid State Sciences 化学-无机化学与核化学

CiteScore

6.60

自引率

2.90%

发文量

214

审稿时长

27 days

期刊介绍： Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.