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Ternary indides RE3T2In4 (RE=Dy–Tm; T=Pd, Ir)

机译:三元瞄准re3t2in4(重新= dy-tm; t = pd,ir)

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摘要

The ternary rare earth transition metal-indides RE3T2In4 (RE=Dy–Tm; T=Pd, Ir) were obtained from high-temperature reactions in sealed niobium ampoules. These indides adopt a hexagonal structure of the Lu3Co1.87In4 type (space group P6?), a ternary ordered superstructure of the aristotype Fe2P. The structures of three different compounds were refined from single-crystal X-ray diffractometer data: a=768.20(6), c=381.97(3) pm, 1441 F2 values, 24 parameters, wR2=0.0338 (Ho3Pd1.90In4); a=774.98(3), c=378.51(2) pm, 577 F2 values, 23 parameters, wR2=0.0742 (Ho3Ir1.69In4.31) and a=780.3(1), c=369.4(1) pm, 573 F2 values, 22 parameters, wR2=0.0403 (Tm3Ir1.51In4.49). Refinements of the occupancies revealed homogeneity ranges in case of the iridium-based crystals resulting from Ir/In mixing. The refined composition of the palladium compound was Ho3Pd1.90In4 resulting from defects on the Wyckoff position 1d, which was already reported for the prototype Lu3Co1.87In4. The geometrical motifs of the RE3T2In4 structures are three different types of tricapped trigonal prisms around the transition metal and indium atoms which are condensed via common edges and triangular faces. Temperature dependent magnetic susceptibility measurements of Dy3Ir2In4 and Tm3Ir2In4 showed Curie-Weiss behavior and the experimental magnetic moments of 10.59(2) μB (Dy3Ir2In4) and 7.40(2) μB (Tm3Ir2In4) confirming stable trivalent RE3+ states. Dy3Ir2In4 and Tm3Ir2In4 order antiferromagnetically with Néel temperatures of TN=13.6(5) and 5.4(5) K, respectively.
机译:从密封的铌安瓿中的高温反应中获得RE3T2IN4(RE = DY-TM; T = Pd,IR)。这些瞄准器采用Lu3Co1.874型(空间组P6?)的六边形结构,施用型Fe2P的三元有序的上层结构。从单晶X射线衍射仪数据中改进了三种不同化合物的结构:a = 768.20(6),C = 381.97(3)PM,1441 F2值,24个参数,WR2 = 0.0338(HO3PD1.90IN4); A = 774.98(3),C = 378.51(2)PM,577 F2值,23个参数,WR2 = 0.0742(HO3IR1.69IN4.31)和A = 780.3(1),C = 369.4(1)PM,573 F2值22参数,WR2 = 0.0403(TM3IR1.51IN4.49)。占用的改进揭示了在IR /混合引起的基于铱的晶体的情况下的均匀性范围。钯化合物的精制组合物是HO3PD1.90in4,由Wyckoff位置1D上的缺陷产生,该缺陷已经报道了原型Lu3Co1.87in4。 RE3T2IN4结构的几何图案是围绕过渡金属和铟原子的三种不同类型的截断的三角形棱镜,其通过普通边缘和三角形粘合冷凝。 DY3IR2IN4和TM3IR2IN4的温度依赖性磁化率测量显示CUIE-WEISS行为和10.59(2)μB(DY3IR2IN4)和7.40(2)μB(TM3IR2IN4)的实验磁矩确认稳定三价RE3 +状态。 DY3IR2IN4和TM3IR2IN4分别用TN = 13.6(5)和5.4(5)k的Néel温度分别进行反铁磁性。

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