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-SulfurDespite its name and the hexagonal sheets in the structure there is no six-fold axis of rotation in the magnesium structure. However hexagonal-looking channels are seen to be running through the structure as it's depicted on the left.
The next page considers the geometry around a magnesium atom in the bulk of the structure.