Quasicrystals

Decagonal Quasicrystal 
white = Al, green = Cu, blue = Rh, for some sites, possiblity of atom occupation < 100% 
atomic Model kindly provided by Prof. Pawel Kuczera and Prof. Walter Steurer
Acta Crystallogr. B68, 578 (2012)

quasicrystal_02.jpg

Penrose Tiling 
Penrose tiling generated with software Bob by Stephen Collins