Mimetite: P63/m Space Group Explained

[ZedCar]

In the general-symmetry-space group table over to the right on the page below:
https://en.wikipedia.org/wiki/Mimetite

It states:

Space group: P63/m

What does the letter P indicate and also the subscript 3?

Thanks

 

[abitslow]

https://en.wikipedia.org/wiki/Hermann–Mauguin_notation#Lattice_types

 

[M Quack]

"6" indicates a hexagonal space group

"P" indicates a primitive group (as compared to face or body centered ones). All hexagonal space groups are primitive.

"_3" indicates a screw axis along the hexagonal c-axis

"/m" indicates a mirror plane perpendicular to the c-axis.

This is space group #176

The Bilbao crystallographic server can provide all kinds of details.

http://www.cryst.ehu.es/

 

[ZedCar]

Thanks guys!