KCrF3低温晶体结构的研究

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Solid State Chemistry Pub Date : 2025-08-08 DOI:10.1016/j.jssc.2025.125558

Øystein S. Fjellvåg , Dipankar Saha , Dmitry Chernyshov , Fabian L.M. Bernal , Helmer Fjellvåg , Bjørn C. Hauback , Bruno Gonano

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引用次数: 0

摘要

我们报道了KCrF3的低温相变和晶体结构，回顾了之前报道的5 K重入四方相变。利用高分辨率x射线粉末衍射在5-300 K温度范围内的两个独立实验，我们研究了结构的发展，并应用对称模式分析来描述从四方到单斜的转变。crf6 -八面体的倾斜会导致对称性降低。对键长和键角的评估显示，没有迹象表明存在可重入或初始转变。我们的发现证实了KCrF3的低温期是单斜的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

On the low temperature crystal structure of KCrF3

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On the low temperature crystal structure of KCrF3

We report on the low-temperature phase transition and crystal structure of KCrF₃, revisiting the previously reported reentrant tetragonal transition at 5 K. Using high-resolution X-ray powder diffraction across a temperature range of 5–300 K in two independent experiments, we study the structural developments and apply symmetry-mode analysis to describe the transition from tetragonal to monoclinic. A tilt of the CrF₆-octahedra drives the symmetry reduction. Evaluation of the bond lengths and angles shows no sign of a reentrant or incipient transition. Our findings confirm that the low-temperature phase of KCrF₃ is monoclinic.

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来源期刊

Journal of Solid State Chemistry 化学-无机化学与核化学

CiteScore

6.00

自引率

9.10%

发文量

848

审稿时长

25 days

期刊介绍： Covering major developments in the field of solid state chemistry and related areas such as ceramics and amorphous materials, the Journal of Solid State Chemistry features studies of chemical, structural, thermodynamic, electronic, magnetic, and optical properties and processes in solids.