Large telescopes also use aluminium in their mirrors for better quality of sight. Aluminium is used to help make synthetic rubies and sapphires for lasers also. It is also used in construction, aluminium is used in sheet products for roofing and wall cladding, in extrusions for windows and doors, and in castings for builders' hardware.
Aluminium makes a lot of compounds and one of them is aluminium and oxygen which come together as alpha-alumina. The formula for this compound is Al2O3. The Lewis Dot structure for this compound is :O=O - Al - Al = O. Another compound for aluminium is aluminium chloride. The formula for this compound is AlCl3. Aluminium hydroxide is another compound and the formula of this one is H3AlO3. This compounds structure looks like this Al3+ HO- HO- HO-. Aluminium nitrite's formula is Al(NO2)3 and its structure is solid with four coordinates. Aluminium Cyanide is another compound and the formula with this is Al(CN)3 and its structure is Al3+ Al3+ C-= C-= C-= C-= C-= C-=. Aluminium Sulfide's formula is Al2S3. Aluminium Trichloride is a good one and its formula is AlCl3 and its structure is three single bond Cl around the Al. Aluminium Carbonate's formula for its compound is Al2(CO3)3. Aluminium Phosphate compound formula is AlPO4. Aluminium Bromate has a formula of Al(BrO3)3.
Alpha-alumina more known as just alumina is one of the most cost effective and widely used material in the family of engineering ceramics. When aluminium come together with oxide it because a lot stronger and maintains its light weight still. It is used for a lot of things like ballistic armor, gas laser tubes, and laboratory instruments. Aluminium nitrite is a newer material in the technical ceramics world. While it was discovered over 100 years ago, it has been developed into a viable product with controlled and reproducible properties within the last 20 years. This compound is help a lot because it can withstand high temperatures.