Fluorite crystallizes in a cubic motif. The X ions occupy the eight tetrahedral interstitial sites whereas M ions occupy the regular sites of a face-centered cubic (FCC) structure.

What is fluorite Antifluorite structure?

The antifluorite structure has ccplfcc anions with cations in all (T+ and T-) tetrahedral sites. The difference between antifluorite and fluorite is that anti- fluorite refers to an anion array with tetrahedral cations, whereas fluorite has the inverse arrangement with a ccp cation array and tetrahedral anions.

What type of solid is fluorite?

Calcium Fluoride is a solid and forms a cube like structure that is centralized around the calcium molecules. The crystal lattice structure that Calcium Fluoride is also known as the fluorite structure (Figure 6.11C.