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(Ca0.95Cd0.10)Pd2Cd3, SrPd2Cd3 and (Eu0.95Cd0.10)Pd2Cd3 with YNi2Al3 type structure – crystal chemistry and magnetic hyperfine interactions
Zeitschrift für Kristallographie - Crystalline Materials ( IF 1.2 ) Pub Date : 2023-07-25 , DOI: 10.1515/zkri-2023-0025 Michael Johnscher 1 , Birgit Gerke 1 , Jutta Kösters 1 , Theresa Block 1 , Oliver Niehaus 1 , Maximilian Kai Reimann 1 , Rainer Pöttgen 1
Zeitschrift für Kristallographie - Crystalline Materials ( IF 1.2 ) Pub Date : 2023-07-25 , DOI: 10.1515/zkri-2023-0025 Michael Johnscher 1 , Birgit Gerke 1 , Jutta Kösters 1 , Theresa Block 1 , Oliver Niehaus 1 , Maximilian Kai Reimann 1 , Rainer Pöttgen 1
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The intermetallic compounds (Ca0.95 Cd0.10 )Pd2 Cd3 , SrPd2 Cd3 and (Eu0.95 Cd0.10 )Pd2 Cd3 were synthesized from the elements in sealed niobium ampoules in an induction furnace. The polycrystalline samples were characterized through their Guinier powder patterns. The structures were refined from single crystal X-ray diffractometer data: YNi2 Al3 type, P 6/mmm , a = 984.61(5), c = 455.33(3) pm, wR 2 = 0.0216, 376 F 2 values, 21 variables for (Ca0.95 Cd0.10 )Pd2 Cd3 , a = 998.55(8), c = 453.65(3) pm, wR 2 = 0.0296, 341 F 2 values, 17 variables for SrPd2 Cd3 and a = 992.57(4), c = 457.34(2) pm, wR 2 = 0.0300, 384 F 2 values, 21 variables for (Eu0.95 Cd0.10 )Pd2 Cd3 . The striking crystal chemical motif in the three structures is a planar [PdCd2 ] Kagome-type layer. The two crystallographically independent Ca (Sr, Eu) atoms have a coordination number of 18 by 6 Pd and 12 Cd atoms. The calcium and europium compound show a small degree of Ca (Eu) substitution by Cd2 dumb-bells with 281 pm Cd–Cd in (Eu0.95 Cd0.10 )Pd2 Cd3 . Temperature dependent magnetic susceptibility measurements show Curie–Weiss behaviour (7.63(1) µB /Eu atom) for the europium compound and the onset of ferromagnetic ordering at T C = 14.9(2) K. The divalent character of europium is corroborated by 151 Eu Mössbauer spectroscpy.
中文翻译:
具有 YNi2Al3 型结构的 (Ca0.95Cd0.10)Pd2Cd3、SrPd2Cd3 和 (Eu0.95Cd0.10)Pd2Cd3 – 晶体化学和磁超精细相互作用
金属间化合物(Ca0.95 光盘0.10 )钯2 光盘3 , 锶钯2 光盘3 和(欧盟0.95 光盘0.10 )钯2 光盘3 是由感应炉中密封的铌安瓿中的元素合成的。多晶样品通过吉尼尔粉末图案进行表征。根据单晶 X 射线衍射仪数据精炼结构:YNi2 铝3 类型,磷 6/嗯 ,A = 984.61(5),C = 455.33(3) 下午,w右 2 = 0.0216, 376F 2 值,21 个变量(Ca0.95 光盘0.10 )钯2 光盘3 ,A = 998.55(8),C = 453.65(3) 下午,w右 2 = 0.0296, 341F 2 值,SrPd 的 17 个变量2 光盘3 和A = 992.57(4),C = 457.34(2) 下午,w右 2 = 0.0300, 384F 2 值,21 个变量(Eu0.95 光盘0.10 )钯2 光盘3 。三个结构中引人注目的晶体化学图案是平面[PdCd2 】戈薇型层。两个晶体学上独立的 Ca (Sr, Eu) 原子的配位数为 18 x 6 Pd 和 12 Cd 原子。钙和铕化合物显示出小程度的 Ca (Eu) 被 Cd 取代2 哑铃 281 pm Cd–Cd(欧盟0.95 光盘0.10 )钯2 光盘3 。与温度相关的磁化率测量显示居里-韦斯行为 (7.63(1) µ乙 /Eu 原子)用于铕化合物和铁磁有序的开始时间 C = 14.9(2) K. 铕的二价特性由以下证实151 Eu 穆斯堡尔光谱。
更新日期:2023-07-25
中文翻译:
具有 YNi2Al3 型结构的 (Ca0.95Cd0.10)Pd2Cd3、SrPd2Cd3 和 (Eu0.95Cd0.10)Pd2Cd3 – 晶体化学和磁超精细相互作用
金属间化合物(Ca