During an investigation of the Mg‐rich end of the Mg–Al–La system, a new ternary phase with the composition of (Al,Mg)₃La was identified. The crystal structure of this phase was determined by conventional X‐ray powder diffraction and transmission electron microscopy analysis and refined using high‐resolution X‐ray powder diffraction. The (Al,Mg)₃La phase is found to have an orthorhombic structure with a space group of C222₁ and lattice parameters of a = 4.3365 (1) Å, b = 18.8674 (4) Å and c = 4.4242 (1) Å, which is distinctly different from the binary Al₃La phase (P6₃/mmc). The resolved structure of the (Al,Mg)₃La phase is further verified by high‐angle annular dark‐field scanning transmission electron microscopy.

中文翻译：

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（Al，Mg）3La：Mg-Al-La系统的新阶段。

在对Mg-Al-La系统的富Mg端进行调查期间，确定了一个新的三元相，其组成为（Al，Mg）₃ La。该相的晶体结构通过常规X射线粉末衍射和透射电子显微镜分析确定，并使用高分辨率X射线粉末衍射进行精制。发现（Al，Mg）₃ La相具有正交结构，其空间群为C 222 ₁，晶格参数为a = 4.3365（1）Å，b = 18.8674（4）Å，c = 4.4242（1） Å，与二元Al ₃ La相（P 6 ₃ /mmc）。（Al，Mg）₃ La相的分辨结构通过高角度环形暗场扫描透射电子显微镜进一步验证。