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How many lattice points are in the unit cell??
Instructions: A 2×2 unit cell plan view is given in each question. Try to identify the correct number of lattice points per unit cell.

  

How many lattice points are in the unit cell?
0
1
4

  

How many lattice points are in the unit cell?
½
1
2
5

  

How many lattice points are in the unit cell?
½
2
1
9

HINT

How many atoms are in the motif?

  

½
3
14
4

  

How many lattice points are in the unit cell?
½ ¼ ¾

HINT

Which atoms are lattice points?
Which atoms are in the motif??

HELP

There are 3 atoms in the motif

3
5
4

  

How many lattice points are in the unit cell?
⅓ ⅔

HINT

Look closely at the environment about each red atom. Are they identical?

1
3
4

  

How many lattice points are in the unit cell?
½ ⅔

HELP

Look closely at the environment about each blue atom

2
1
6