Many structures can be described as close packed arrays of anions with cations occupying octahedral or tetrahedral holes in the lattice. Click on the "CCP lattices"
"HCP lattices" tabs to investigate some of the common crystal structures which are described in this way. The pages feature interactive models of the structures which can
be examined from all angles by left-clicking and dragging to rotate the structures. Press shift at the same time and move the mouse up and down will zoom in and out. Right click or click on the Jmol logo and select from the menu for advanced viewing options. Each structure has a set of buttons for you to press to investigate aspects of the structures in more detail.
The final two tabs provide some questions which you should be able to answer by studying the structures and links to additional resources on related topics.
