a: Crystal structure ~
b: three-dimensional wallpaper design
What: "A crystal structure is like a three-dimensional wallpaper design in that it is an endless repetition of some motif (i.e., a group of atoms or molecules). The process of creating the motif involves point-group operations (rotation, reflection, and inversion) that define it. The process of creating the wallpaper involves translation (with or without rotation or reflection)to create the complete structure (which we call the lattice)."
Useful?
Writer: James R. Connolly
LCC:
Where: Reference Link Has Evaporated
Date: Mar 8 2014 12:54 PM
# 5277 Critique Analogy