Nelmes R J, McMahon M I, Loveday J S, Rekhi S
Department of Physics and Astronomy and Centre for Science at Extreme Conditions, The University of Edinburgh, Mayfield Road, Edinburgh EH9 3JZ, United Kingdom.
Phys Rev Lett. 2002 Apr 15;88(15):155503. doi: 10.1103/PhysRevLett.88.155503. Epub 2002 Apr 1.
The crystal structure of Rb-III, stable between 13 and 17 GPa, has been determined from quasi-single-crystal x-ray diffraction data. It is orthorhombic, space group C222(1), with 52 atoms in the unit cell, and has an 8-10-8-8-10-8 stacking of 8- and 10-atom layers. The recently reported 84-atom structure of Cs-III can be understood as an 8-8-10-8-8-8-8-10-8-8 stacking of the same layers. These represent a new class of modulated elemental structures.
已根据准单晶X射线衍射数据确定了在13至17吉帕斯卡压力下稳定存在的Rb-III的晶体结构。它是正交晶系，空间群为C222(1)，晶胞中有52个原子，并且具有由8原子层和10原子层构成的8-10-8-8-10-8堆积结构。最近报道的Cs-III的84原子结构可以理解为相同层的8-8-10-8-8-8-8-10-8-8堆积结构。这些代表了一类新型的调制元素结构。
