Hübner Julia-Maria, Freccero Riccardo, Prots Yurii, Schwarz Ulrich
Faculty of Chemistry and Food Chemistry, Technische Universität Dresden, 01062, Dresden, Germany.
Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso 31, I-16146, Genova, Italy.
Chemistry. 2025 Mar 3;31(13):e202404515. doi: 10.1002/chem.202404515. Epub 2025 Jan 10.
High-pressure, high-temperature synthesis at 12 GPa between 750 and 1000 °C for 30 to 300 min yields the last missing rare-earth metal monogermanide, YbGe. Powder and single-crystal X-ray diffraction measurements reveal that the compound crystallizes in a FeB-type structure (space group Pnma, a=7.901(2) Å, b=3.8981(9) Å, and c=5.873(2) Å). The results of the chemical bonding study, while supporting the presence of polyanionic Ge chains interacting with the surrounding Yb through multi-atomic polar bonds, suggest a transitional scenario between the monogermanides formed by alkaline-earth elements and those formed by trivalent rare-earth metals.
在12吉帕斯卡的压力下，于750至1000摄氏度的高温下合成30至300分钟，得到了最后一种缺失的稀土金属单锗化物YbGe。粉末和单晶X射线衍射测量表明，该化合物结晶为FeB型结构（空间群Pnma，a = 7.901(2) Å，b = 3.8981(9) Å，c = 5.873(2) Å）。化学键研究结果表明，虽然存在通过多原子极性键与周围Yb相互作用的聚阴离子Ge链，但这表明在碱土元素形成的单锗化物和三价稀土金属形成的单锗化物之间存在一种过渡情况。
