Cristobalite is a mineral polymorph of silica that is formed at very high temperatures. It is used in dentistry as a component of alginate impression materials as well as for making models of teeth. It has the same chemical formula as quartz, SiO₂, but a distinct crystal structure.

Does tridymite contain silica?

Tridymite, silica mineral, the stable form of silica (silicon dioxide, SiO₂) at temperatures between 870° and 1,470° C (1,598° and 2,678° F); at lower temperatures it transforms to high-quartz, at higher to cristobalite. It has three modifications: high-tridymite, middle-tridymite, and low-tridymite.

What is the difference between quartz and cristobalite?

is that quartz is (mineralogy) the most abundant mineral on the earth's surface, of chemical composition silicon dioxide, si]][[oxygen|o₂ it occurs in a variety of forms, both crystalline and amorphous found in every environment while cristobalite is (mineral) a mineral of volcanic rocks that solidified at a high ...