A REVIEW OF CERIUM OXIDE

The commonest kind of crystalline alumina, α-aluminium oxide, is called corundum. When trace aspects make it surface purple it is known as ruby, but all other colorations tumble beneath the designation sapphire. Corundum has a trigonal Bravais lattice with an area group of R-3c (range 167 inside the Worldwide Tables).Try to remember, preserve this