当前位置：
X-MOL 学术
›
Z. Anorg. Allg. Chem.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
LaNiGe with Non‐centrosymmetric LaPtSi Type Structure
Zeitschrift für anorganische und allgemeine Chemie ( IF 1.1 ) Pub Date : 2020-09-26 , DOI: 10.1002/zaac.202000317 Rainer Pöttgen 1 , Nazar Zaremba , Orest Pavlosiuk 2 , Ihor Muts 3 , Galyna Nychyporuk , Volodymyr Pavlyuk 4 , Dariusz Kaczorowski 2 , Vasyl Zaremba
Zeitschrift für anorganische und allgemeine Chemie ( IF 1.1 ) Pub Date : 2020-09-26 , DOI: 10.1002/zaac.202000317 Rainer Pöttgen 1 , Nazar Zaremba , Orest Pavlosiuk 2 , Ihor Muts 3 , Galyna Nychyporuk , Volodymyr Pavlyuk 4 , Dariusz Kaczorowski 2 , Vasyl Zaremba
Affiliation
|
The equiatomic germanide LaNiGe was synthesized from the elements by arc‐melting and subsequent annealing at 1173 K for 14 days. Its non‐centrosymmetric LaPtSi type structure was refined from single‐crystal X‐ray diffractometer data: I41md, a = 420.80(6), c = 1440.3(3) pm, wR = 0.0477, 284 F2 values and 14 variables. The nickel and germanium atoms build up a three‐dimensional [NiGe]δ– polyanionic network (2 × 241 and 1 × 242 pm Ni–Ge) in which the lanthanum atoms fill cavities with coordination number 12. This picture of chemical bonding is supported by an evaluation of the electron localization function. Physical properties of LaNiGe were studied by means of magnetic susceptibility, magnetization, specific heat and electrical resistivity measurements. The compound was found to be a Pauli paramagnet with a molar magnetic susceptibility of about χ = 1.6 × 10–4 emu·mol–1·Oe–1. The temperature dependence of the electrical resistivity shows Bloch‐Grüneissen‐Mott behavior indicating the metallic character of LaNiGe, which is in full agreement with the results of electronic structure and density of states calculations. No superconducting transition was observed in the temperature regime down to 1.72 K.
中文翻译：
具有非中心对称LaPtSi型结构的LaNiGe
通过电弧熔化和随后在1173 K下退火14天，由这些元素合成等原子锗化物LaNiGe。从单晶X射线衍射仪数据中提炼出其非中心对称的LaPtSi型结构：I 4 1 md，a = 420.80（6），c = 1440.3（3）pm，wR = 0.0477，284 F 2值和14个变量。镍和锗原子构成三维[NiGe] δ–聚阴离子网络（NiGe的2×241和1×242 pm Ni–Ge），其中镧原子填充了配位数为12的腔。通过磁化率，磁化强度，比热和电阻率测量研究了LaNiGe的物理性质。发现该化合物是保利顺磁体，摩尔磁化率约为χ = 1.6×10 –4 emu · mol –1 · Oe –1。电阻率的温度依赖性显示出Bloch-Grüneissen-Mott行为，表明LaNiGe的金属特性，这与电子结构和态密度计算的结果完全一致。在低至1.72 K的温度范围内未观察到超导转变。
更新日期：2020-09-26
中文翻译：
具有非中心对称LaPtSi型结构的LaNiGe
通过电弧熔化和随后在1173 K下退火14天，由这些元素合成等原子锗化物LaNiGe。从单晶X射线衍射仪数据中提炼出其非中心对称的LaPtSi型结构：I 4 1 md，a = 420.80（6），c = 1440.3（3）pm，wR = 0.0477，284 F 2值和14个变量。镍和锗原子构成三维[NiGe] δ–聚阴离子网络（NiGe的2×241和1×242 pm Ni–Ge），其中镧原子填充了配位数为12的腔。通过磁化率，磁化强度，比热和电阻率测量研究了LaNiGe的物理性质。发现该化合物是保利顺磁体，摩尔磁化率约为χ = 1.6×10 –4 emu · mol –1 · Oe –1。电阻率的温度依赖性显示出Bloch-Grüneissen-Mott行为，表明LaNiGe的金属特性，这与电子结构和态密度计算的结果完全一致。在低至1.72 K的温度范围内未观察到超导转变。
京公网安备 11010802027423号