B80 and Other Medium-Sized Boron Clusters: Core−Shell Structures, Not Hollow Cages Zhao, Jijun ; Wang, Lu ; Li, Fengyu ; Chen, Zhongfang Abstract Publication: Journal of Physical Chemistry A Pub Date: September 2010 DOI: 10.1021/jp1018873 Bibcode: 2010JPCA..114.9969Z