Names: Aluminium oxide (Aluminum oxide), Aluminum oxide, Aluminium oxideAlpha-Alumina, Alumina, Aluminum trioxide, Alpha-Aluminum oxide, Abramant, Abramax, Abrarex, Abrasit, Alcoa F 1, Almite, Alon C, Aloxite, Cab-O-grip, Catapal S, Compalox, Conopal, Diadur, Dialuminum trioxide, Dispal alumina, Dispal M, Dural, Dotment 324, Dotment 358, Exolon XW 60, Faserton, Fasertonerde, Hypalox II, Jubenon R, Ketjen B, Lucalox, Martoxin, Poraminar, Aluminum oxide [a-Alumina], Aluminum trioxide [a-Alumina], [Note: α-Alumina is the main component of technical grade alumina. Corundum is natural Al2O3. Emery is an impure crystalline variety of Al2O3.]
Appearance: White solid ; White powder ; White, odorless, crystalline powder.
Si
Names: Silicon, Si, Element 14Elemental silicon, [Note: Does not occur freely in nature, but is found in silicon dioxide (silica) and in various silicates.]
Appearance: Steel-grey crystals or black-to-brown amorphous powder ; Black to gray, lustrous, needle-like crystals. [Note: The amorphous form is a dark-brown powder.]