A unit cell is the smallest representation of an entire crystal:
The hexagonal closest packed (hcp) - contains 6 atoms per unit cell.
The face-centered cubic (fcc) - contains 4 atoms per unit cell
The body-centered cubic (bcc) - contains 2 atoms per unit cell.
The simple cubic - contains 1 atom per unit cell.
In a unit cell: atoms have different contribution depending on their location
corner atoms 1/8
atoms in center 1
atoms in face of the cube 1/2
The unit cell of nickel arsenide is shown here.
What type of lattice does this crystal possess?
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Unit Cell concept. You can view video lessons to learn Unit Cell. Or if you need more Unit Cell practice, you can also practice Unit Cell practice problems.