Space Groups
Unit Cells
Asymmetric Units
Calcula5ng Z
Bravais La;ce
The 17
Plane
Groups
(2D)
+ or - Indicates that the point is an arbitrary height z above or below the base plane
where the height is ze
Space Groups, space groups, space groups.
Introduc4on to OLEX2 so:ware
Genera4on of X-rays (Chapter 13)
Dirac4on (Chapter 14)
Z = Number of molecules in the unit cell
Unit Cell =
a = 15.6
b = 23.5
c = 25.1
Travel Symmetry
Transla.on
Glide Planes
Screw Axes
La9ces
Unit Cells
Only transla.on is present, however because the unit cell is primiNULLe the space
group (plane group) is p1.
Symmetry element diagram
Eq
Symmetry Con)nued (Schoenies vs. Hermann-Mauguin Nota)on
Orthographs
Point Groups
Introduc)on to Travel Symmetry
Periodicity, La7ces
Unit Cells
Molecule
Symmetry Opera0ons
Schoenies
Cl
Cl
Cl
Cl
Cl
Cl
Hermann-
Maguin
3D
Discussed History of Crystallography
Baileys oce hours will be every Friday in
Davenport 230 from 8:30 to 9:30.
Deni7on of Crystallography
How to grow Crystals Good, Bad, and Ugly
Symmetry (Review)
Schoenies vs.
Dirac'on.
Dirac'on (Chapter 18, 19)
Reciprocal Space (Chapter 20)
How is dirac'on from an atom dierent than dirac'on from an electron?
If electrons within an atom spent 100% of their 'me at the nucleus and each
Space Groups
Unit Cells
Asymmetric Units
Calcula5ng Z
Bravais La;ce
Space Groups, Space Groups, Space Groups
A researcher has made a new compound
and grew some crystals. Is this a new
compound or a known st
Introduc.on to Travel Symmetry
Periodicity, La9ces
Unit Cells
Travel Symmetry
Transla.on
Glide Planes
Screw Axes
La9ces
Unit Cells
Transla'ons slide points by a xed distance in the x, y, z direc.on
Genera<on of X-rays (Chapter 13)
Dirac<on (Chapter 14)
Sca$ering from Electrons (Chapter 16)
Sca$ering from Atoms (Chapter 17)
Interac<on of X-rays with one electron
Intensi<es of X-rays sca$ered in various direc<ons