The quasi-binary system YbMg2-YbIn2 was studied around the equiatomic composition. In contrast to the ordered rare earth (RE) phases REMgIn (ZrNiAl type), ytterbium forms phases with different structures and pronounced Mg/In mixing (M sites). The structures of YbMg0.75In1.25 (CaLiSn type, P3m1, a = 501.95(7), c = 1087.3(2) pm, wR2 = 0.0490, 790 F 2 values, 32 variables) and Yb6Mg6.41In5.59 (Yb6Ir5Ga7 type, P63/mcm, a = 1060.77(14), c = 970.27(16) pm, wR2 = 0.0484, 701 F 2 values, 26 variables) were refined from single-crystal X-ray diffractometer data. YbMg0.75In1.25 is an AlB2 superstructure with a tripling of the subcell. The magnesium and indium atoms form three differently puckered layers of M 6 hexagons. The Yb6Mg6.41In5.59 structure is derived from the hexagonal Laves phase YbMg2 (MgZn2 type, P63/mmc). A klassengleiche symmetry reduction leads to four crystallographically independent M sites for the rows of corner- and face-sharing tetrahedra which allow a composition close to the equiatomic one. The M–M distances in both structures cover the broad range from 289 to 331 pm, comparable to the sums of the covalent radii. Temperature dependent magnetic susceptibility studies of the polycrystalline YbMg0.75In1.25 and Yb12Mg13In11 samples indicate Pauli paramagnetism with room temperature values of 2.8(1) × 10−3 emu mol−1 (YbMg0.75In1.25) and 5.2(1) × 10−3 emu mol−1 (Yb12Mg13In11).

中文翻译：

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YbMg0.75In1.25和Yb6Mg6.41In5.59的晶体结构和磁性能

准二元系 YbMg2-YbIn2围绕等原子组成进行了研究。与有序稀土相比（关于) 阶段关于MgIn（ZrNiAl 型），镱形成具有不同结构的相和明显的 Mg/In 混合（中号站点）。 YbMg的结构0.75在1.25（钙锂锡型，磷3米1、A= 501.95(7),C= 1087.3(2) 下午，WR2 = 0.0490, 790F 2值，32 个变量）和 Yb6镁6.41在5.59(镱6红外线5嘎7类型，磷63/微厘米,A= 1060.77(14),C= 970.27(16) 下午,WR2 = 0.0484, 701F 2值，26 个变量）是根据单晶 X 射线衍射仪数据精炼的。镱镁0.75在1.25是一个AlB2上层建筑的子单元增加了三倍。镁和铟原子形成三个不同的褶皱层中号 6六边形。镱6镁6.41在5.59结构源自六方拉夫斯相 YbMg2(镁锌2类型，磷63/MMC）。 A阶级对称性降低导致四个晶体学独立中号角和面共享四面体行的位点，允许接近等原子的组成。这中号–中号两个结构中的距离涵盖了从 289 到 331 pm 的广泛范围，与共价半径的总和相当。多晶 YbMg 的温度依赖性磁化率研究0.75在1.25和镱12镁13在11样品表明泡利顺磁性，室温值为 2.8(1) × 10−3鸸鹋摩尔−1(镱镁0.75在1.25) 和 5.2(1) × 10−3鸸鹋摩尔−1(镱12镁13在11）。