id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
work_6glii24ggfhvxhtuezunxlsica	István Hargittai	Limits of perfection	1986	17	.pdf	application/pdf	6782	978	90	Institute o f Materials Science and Departments o f Chemistry and Physics, University of Connecticut, hexagonal symmetry of the snow crystals but lays the foundation o f the principle o f densest According to the regular solids model, taking the six planets, known to Kepler, in order, As we compare the symmetries of molecules and crystals, a striking difference is that there is the finite number (32) of symmetry classes for crystal habit with no such limits for molecules. structural consequences o f densest packing in molecular crystals, the following explanation is spatial requirements o f the molecules in building the molecular crystal rather than the peculiarities symmetry as it has at least one unique point in the whole structure. the molecules and crystals are merely examples, there is a hierarchy o f symmetries. The human face is an obvious example o f bilateral symmetry.	./cache/work_6glii24ggfhvxhtuezunxlsica.pdf	./txt/work_6glii24ggfhvxhtuezunxlsica.txt