Synthesis, chiral crystal structure, and magnetic properties of Ba 3 Ga 2 O 5 Cl 2
Synthesis, chiral crystal structure, and magnetic properties of Ba 3 Ga 2 O 5 Cl 2
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Ba 3 Ga 2 O 5 Cl 2 的合成、手性晶体结构及磁性能
DOI：
10.1107/s2052520622004723
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Kong, Tai
中科院分区：
文献类型：
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作者：
Rine, Jeremy;Yang, Yongqi;Shu, Zhixue;Zhao, Jianda;Xie, Weiwei;Kong, Tai
在空气中用固相反应法合成了与Ba 3Fe 2 O 5Cl 2同构的新化合物Ba 3Ga 2 O 5Cl 2。通过单晶和粉末X射线衍射分析，确定其晶体结构为立方晶系，空间群为I213，晶胞参数a = 9.928（1）nm。 Ba_3Ga_2O_5Cl_2中的Ga ~（3+）离子与O原子配位形成GaO_4四面体。10个相邻的GaO 4四面体通过角共享和沿着体对角线的旋转进一步桥接，产生手性结构。磁化测量表明温度无关的抗磁性行为，这是定性一致的核心抗磁性的所有组成元素。
A new compound, Ba3Ga2O5Cl2, isostructural with Ba3Fe2O5Cl2, was synthesized by solid-state reaction in air. Through single-crystal and powder X-ray diffraction analysis, the crystal structure was determined to be cubic with chiral space group I213 and unit-cell parameter a = 9.928 (1) Å. The Ga3+ ions in Ba3Ga2O5Cl2 are coordinated by O atoms and form GaO4 tetrahedra. Ten neighboring GaO4 tetrahedra are further bridged through corner sharing and rotation along the body diagonal, producing the chiral structure. Magnetization measurements indicate temperature-independent diamagnetic behavior, which is qualitatively consistent with core diamagnetism from all the constituent elements.