Tetrahedral Units: For Dodecahedral Super-Structures
  Different novel organic-chemical possibilities for tetrahedral building units are considered, with attention to their utility in constructing different super-structures. As a representative construction we consider the use of sets of 20 such identical tetrahedral units to form a super-dodecahedron. 
Y. Ortiz, D. J. Klein and J. F. Liebman
physics.chem-ph