Lecture 12 Flashcards
1
Q
What is a screw axes?
A
rotation of 360/N degrees about an
axis, then translate by M/N of unit cell parallel to axis.
2
Q
What does the variable of the glide plane mean
A
the translation direction
3
Q
What is the n glide plane
A
+1/2 in 2 directions
4
Q
What is the d glide plane?
A
+1/4 in two directions
5
Q
what is the e glide plane?
A
6
Q
how many different space groups are there
A
230
