MgAl₂X₈ (X = Cl, Br) was synthesized from MgX₂ and AlX₃, and the physical properties were evaluated by XRD, AC conductivity, and NMR. MgAl₂Br₈ has the same crystal structure as MgAl₂Cl₈ and belongs to the space group C2/c. MgAl₂Cl_8-yBr_y was also synthesized in the same manner as MgAl₂Br₈. MgAl₂Cl_8-yBr_y was found to have the same crystal structure as MgAl₂Cl₈ and forms a solid solution in all the synthesized compositions. From the Rietveld analysis of the XRD pattern, it was found that the arrangement of Cl and Br in the crystal had no order and occupied the halogen sites almost randomly. The AC conductivity of the obtained compound was lowest for MgAl₂Cl₈ and highest for MgAl₂Cl₂Br₆. The conductivity of MgAl₂Cl₂Br₆ at 400 K is 1.3 × 10⁻⁶ S/cm, and the Nyquist plot suggests that MgAl₂Cl_8-yBr_y is a magnesium ionic conductor. In the temperature range from room temperature to 412 K, there was no significant change in the ²⁷Al NMR spectra of a MgAl₂Br₈ single crystal, and the effects of Mg²⁺ ionic conduction and the reorientation motion of AlX₄ˉ anion were not observed.

由MgX ₂和AlX ₃合成MgAl ₂ X ₈（X = Cl，Br），并通过XRD，AC电导率和NMR评估其物理性质。MgAl ₂ Br ₈具有与MgAl ₂ Cl ₈相同的晶体结构，并且属于空间群C2 / c。还以与MgAl ₂ Br ₈相同的方式合成了MgAl ₂ Cl _8-y Br _y。发现MgAl ₂ Cl _8-y Br _y具有与MgAl ₂ Cl ₈相同的晶体结构。并在所有合成的组合物中形成固溶体。从XRD图的Rietveld分析，发现Cl和Br在晶体中的排列无序并且几乎随机地占据卤素位点。所得化合物的AC电导率对于MgAl ₂ Cl ₈最低，而对于MgAl ₂ Cl ₂ Br ₆最高。MgAl ₂ Cl ₂ Br ₆在400 K下的电导率为1.3×10 ^-6  S / cm，奈奎斯特图表明MgAl ₂ Cl _8-y Br _y是镁离子导体。在温度范围为室温至412 K，有一个在没有显著变化²⁷一个的MgAl的铝NMR谱₂溴₈单晶和Mg的效果²⁺离子传导和ALX的重新定向运动₄ ˉ阴离子是没有观察到。