2.1 - 2.3
How many times did you watch each video?
Did you take notes?
Just used posted notes
Video comments (reshoot, slow down, etc):
What are the defining features for a material to be crystalline?
2D crystal of one atom flavor (black spheres)
Which of these (A-I) would serve as unit cells for this crystal? Why did you throw out the others?
Which of these are acceptable primitive unit cells? Why?
Pentagonal building blocks
The pattern above is built out of two types of rhombi (light and dark purple); is this a crystal?
Do you have other questions/pressing concerns?
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