# Worksheet: Packing Efficiency

In this worksheet, we will practice calculating the packing efficiencies of crystal lattices from the atomic or ionic radii and the Bravais lattice type.

**Q2: **

A metal has an atomic packing density of . What type of lattice do the metal atoms form?

- ASimple cubic
- BFace-centered cubic
- CBody-centered cubic
- DDiamond cubic
- EHexagonal close-packed

**Q3: **

Calculate to the nearest percent the packing density of the carbon atoms in diamond.

**Q4: **

Which of the following lattice structures has the lowest packing density?

- AFace-centered cubic
- BSimple cubic
- CBody-centered cubic
- DDiamond cubic
- EHexagonal close-packed