The crystal structure of the magnetoelectric metal UNi₄B was determined from high-resolution synchrotron X-ray diffraction experiments using single-crystalline samples. The direct method and the least-square refinement indicate a structural model with the space group Cmcm (no. 63, \(D_{2h}^{17}\)), where U atoms form a pseudo-triangular lattice in the U–Ni–B layers stacking along the a-axis alternately with the Ni layers. The refined values of the structural parameters including anisotropic atomic displacement parameters are provided for all atoms in the unit cell. The obtained structural model is discussed in terms of the magnetoelectric effect reported for this compound.

中文翻译：

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磁电金属UNi4B的X射线晶体结构分析

磁电金属UNi ₄ B的晶体结构是使用单晶样品通过高分辨率同步加速器X射线衍射实验确定的。直接法和最小二乘精炼表示结构模型为Cmcm空间组（编号63，\（D_ {2h} ^ {17} \）），其中U原子在沿A轴堆叠的U–Ni–B层中与镍层交替形成伪三角晶格。为晶胞中的所有原子提供了包括各向异性原子位移参数在内的结构参数的精确值。根据该化合物的磁电效应讨论了获得的结构模型。