Abstract
The structure of Cs-III, stable between 4.2 and at room temperature, has been determined from single-crystal x-ray diffraction data. Rather than the simple fcc structure previously reported [Hall et al., Science 146, 1297 (1964)], the data yield a complex new type of elemental structure which is orthorhombic (space group ) with 84 atoms in the unit cell. No evidence could be found for the fcc form reported previously, even in a further experiment, conducted under conditions close to those used by Hall et al., which also yielded the 84-atom structure.
- Received 17 August 2001
DOI:https://doi.org/10.1103/PhysRevLett.87.255502
©2001 American Physical Society