There are three trihydroxides: bayerite, gibbsite, and nordstrandite, which differ in their crystalline structure (polymorphs).
It can be made from the elements at 800 °C (1,472 °F).
It is air-stable material with a usefully high thermal conductivity.
Aluminium nitride (Al N) is the only nitride known for aluminium.
Unlike the oxides, it features tetrahedral Al centers.
The coordination number of such compounds varies, but generally Al sublimes (with cracking) at 1,291 °C (2,356 °F).
With heavier halides, the coordination numbers are lower.
Aluminium or aluminum is a chemical element with symbol Al and atomic number 13.
It is a silvery-white, soft, nonmagnetic, ductile metal in the boron group.
Heating the hydroxides leads to formation of corundum.