a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earths crust as quartz or cristobalite or tridymite or lechatelierite
[ Syn: silicon oxide , silicon dioxide ]
a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earths crust as quartz or cristobalite or tridymite or lechatelierite
[ Syn: silicon oxide , silicon dioxide ]