Hi,(adsbygoogle = window.adsbygoogle || []).push({});

I am doing a lab on packing methods. Hexagonal closest, face-centred and body-centred.

I had no trouble drawing the diagrams for these and and determining cordination numbers and seeing which is more efficient. However I am having trouble explaining the relationship between coordination number and density. It gives mass/volume as the definition of density.

What I did was place one unit in an imaginary box - assign each atom a value of 1 mass and divide by volume. This gives me a higher density for body-centred which I know is wrong.

Can anyone help explain to me what I am doing wrong?

Thanks

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Packing of Particles

**Physics Forums | Science Articles, Homework Help, Discussion**