A new ternary intermetallic compound Al3GaCu9 was synthesized experimentally. A high-quality powder diffraction pattern of the compound was collected by an X-ray diffractometer, and its crystal structure was determined using the Rietveld refinement method. Results show that the compound has a cubic cell with the Al4Cu9 structure type (space group $P\bar{4}3m$ and Pearson symbol cP52). The lattice parameter a = 8.7132(3) Å, unit-cell volume V = 661.52 Å3, calculated density Dcalc = 7.26 g/cm3, and Z = 4. The residual factors converge to Rp = 2.96%, Rwp = 4.06%, and Rexp = 2.57%. The experimentally obtained reference intensity ratio value is 7.04.

实验合成了一种新型三元金属间化合物Al 3 GaCu 9 。通过X射线衍射仪收集该化合物的高质量粉末衍射图，并使用Rietveld精修方法确定其晶体结构。结果表明，该化合物具有Al 4 Cu 9结构类型的立方晶胞（空间群$P\bar{4}3m$，皮尔逊符号cP 52）。晶格参数a = 8.7132(3) Å，晶胞体积V = 661.52 Å 3，计算密度D calc = 7.26 g/cm 3，Z = 4。剩余因子收敛为R p = 2.96%，R wp = 4.06%，R exp = 2.57%。实验得到的参考强度比值为7.04。