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-SulfurEight unit cells of caesium chloride are shown to the left. Are these two types of ion in equivalent positions in the structure? If they are equivalent we ought to be able to re-draw the unit cells with the corners at the positions presently occupied by the body-centre caesiums.
To consider how the unit cells may be drawn differently go to page 5.