But what exactly is crystallography?

Crystallography is the science that gives us clear views of the atomic and molecular structures inside matter - whether biological or mineral. It gives us, in other words, the keys we need to understand how the physical world works.

The world is full of different materials, varying both in their functional characteristics and how they look or feel. Why, for example, can some materials conduct electricity whilst others provide good insulation? Why are some of them hard and others soft? How does an antibiotic work? etc.

Crystallography provides the answers, by showing how materials are organised at the atomic level - as you will see from the three films below.
(Third film only available in French)