silica silicon oxide silicon dioxide
silica%1:27:00:: silicon_oxide%1:27:00:: silicon_dioxide%1:27:00::
kremen kremenica silicijev dioksid silicijev oksid
a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite