Week 5 Flashcards
Define crystal structure
(As a question)
How are the atoms, ions, or molecules arranged?
Define unit cell
The smallest repeating unit that can build a crystal
Define lattice parameter
Define lattice
Define crystal basis
Lattice + Basis = ______ _____
Crystal structure
What are the 4 Bravais lattices we focus on
What does an FCC look like
What does a BCC look like
What does a hexagonal-close packed look like
(And acronym)
HCP
What does simple cubic look like
And acronym
SC
What question does atomic packing factor answer
SC: not normally seen in _____ (polonium = bad idea)
Metals
BCC: give 2 examples
Steels
High temp titanium
FCC: give 2 examples
Aluminum
Copper
BCC: what is the coordination #
(And what does this mean)
CN=8
(8 atoms touching the centre atom)
FCC: what is the coordination #
CN=12
What does finding the LFP looking like in a cell
Red line or green line
What does the stacking sequence for HCP look like
ABAB
What does the stacking sequence for FCC look like
BACBAC
Miller indices: which coordinates do we always use
Point coordinates: what question do they answer
Where are you relative to the unit cell
Directions: how to calculate?
Head-tail
Directions: use ______ brackets without _____ or ______
Multiply/divide through to get _____
Use _______ instead of negative sign
Square, commas, spaces
Integers
Bars
5 steps for finding planes
Planes: when do you use round brackets and when do you use curly
Directions: when do you use square brackets and when do you use angle brackets
