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首页> 外文期刊>Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences >Ternary indides REMgIn (RE = Y, La-Nd, Sm, Gd-Tm, Lu). Synthesis, structure and magnetic properties
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Ternary indides REMgIn (RE = Y, La-Nd, Sm, Gd-Tm, Lu). Synthesis, structure and magnetic properties

机译:三元表示REMgIn(RE = Y,La-Nd,Sm,Gd-Tm,Lu)。合成,结构和磁性

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The equiatomic rare earth-magnesium-indium compounds REMgIn (RE = Y, La-Nd, Sm, Gd-Tm, Lu) were prepared from the elements in sealed tantalum tubes inside a water-cooled sample chamber of an induction furnace. All compounds were characterized through their X-ray powder patterns. They crystallize with the hexagonal ZrNiAl type structure, space group P (6) over bar 2m, with three formula units per cell. The structure of SmMgIn was refined from X-ray single crystal diffractometer data: a = 761.3(2), c = 470.3(1) pm, wR2 = 0.0429, 380 F-2 values and 14 variable parameters. The DyMgIn, HoMgIn, and TmMgIn structures have been analyzed using the Rietveld technique. The REMgIn structures contain two cystallographically independent indium sites, both with tri-capped trigonal prismatic coordination: In1Sm(6)Mg(3) and 1n2Mg(6)Sm(3). Together the magnesium and indium atoms form a three-dimensional [MgIn] network with Mg-Mg distances of 320 and Mg-In distances in the range 294 - 299 pm. Temperature dependent magnetic susceptibility data show Curie-Weiss behavior for DyMgIn, HoMgIn, and TmMgIn with experimental magnetic moments of 11.0(1) mu(B)/Dy atom, 10.9(1) mu(B)/Ho atom, and 7.5(1) mu(B)/Tm atom. The three compounds order antiferromagnetically at T-N = 22(2) K (DyMgIn), 12(1) K (HoMgIn), and 3(1) K (TmMgIn).
机译:由感应炉水冷样品室内的密封钽管中的元素制备等原子稀土-镁-铟化合物REMgIn(RE = Y,La-Nd,Sm,Gd-Tm,Lu)。所有化合物均通过X射线粉末图谱进行表征。它们以ZrNiAl六角形结构结晶,在bar 2m上具有空间群P(6),每个单元具有三个分子式。 SmMgIn的结构从X射线单晶衍射仪数据中得到了改进:a = 761.3(2),c = 470.3(1)pm,wR2 = 0.0429,380 F-2值和14个可变参数。 DyMgIn,HoMgIn和TmMgIn结构已使用Rietveld技术进行了分析。 REMgIn结构包含两个cystallographically独立的铟位点,都具有三封三角棱柱坐标:In1Sm(6)Mg(3)和1n2Mg(6)Sm(3)。镁和铟原子一起形成三维[MgIn]网络,其Mg-Mg距离为320,Mg-In距离在294-299 pm之间。温度相关的磁化率数据显示DyMgIn,HoMgIn和TmMgIn的居里-威斯行为,实验磁矩为11.0(1)mu(B)/ Dy原子,10.9(1)mu(B)/ Ho原子和7.5(1 )mu(B)/ Tm原子。这三种化合物在T-N = 22(2)K(DyMgIn),12(1)K(HoMgIn)和3(1)K(TmMgIn)时反铁磁性排列。

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