Resources written by Chas McCaw for sixth form chemistry teaching and beyond.
General interest:
Graphite Buckminsterfullerene Ice White phosphorus Benzene Cyclohexane AdamantaneCubic:
Sodium Caesium chloride Polonium Copper Halite Fluorite Antifluorite Zinc blende DiamondNon-cubic:
Hexagonal:
Magnesium WurtziteTetragonal:
RutileTrigonal:
α-quartzTriclinic:
Copper(II) sulfateOrthorhombic:
α-SulfurMonoclinic:
β-SulfurTo go directly to the unit cell structure, click the link to page 3 below.
The antifluorite structure is shown to the left in a realistic space-filling representation. Like the fluorite structure, it involves a 2:1 stoichiometry of ions with the more numerous ion occupying all of the tetrahedral holes in a face-centred cubic lattice of the counter ion. The difference is that the cation:anion stoichiometry is 1:2 rather than 2:1. Sodium oxide, Na2O, is an example of an antifluorite structure.
Go to page 2 to see another representation of antifluorite.