PH-571 Dr. Hla Ohio University Solid State Physics PH-571 Dr. Hla Ohio University

Chapter 1 CRYSTAL STRUCTURES

Lattice = A set of uniform points that fill the space Lattice = A set of uniform points that fill the space. Basis = A basis can be single atoms, molecules or a group of atoms that can be attached to the lattice. Crystal structure = lattice + basis

Ag(111) surface (Single Crystal Silver Surface Structure)

Here, the lattice points are illustrated over single silver atoms (basis).

Wigner-Seitz Cell

Bravias Lattices Simple Cubic

Body Centered Cubic (bcc)

bcc

Primitive Cell (bcc)

Drawing of Face Centered Cubic (fcc)

Dimond Structure

Dimond Structure

Hexagonal Structure

CsCl Structure 8 Coordination number

NaCl Structure 6 Coordination Number

Hexagonal Close-Packed Structure (hcp)

Fcc packing

fcc Structure