Final answer:
Quartz is a framework silicate with a three-dimensional network structure composed of silicon dioxide (SiO2).
Step-by-step explanation:
The mineral quartz is a framework silicate. In silicate minerals, silicon-oxygen tetrahedra can be arranged in various forms such as rings, chains, sheets, or complex three-dimensional frameworks. Specifically, quartz is a mineral consisting primarily of silicon dioxide (SiO2), where the tetrahedra are linked together in a three-dimensional network, making it a framework silicate.
Each silicon atom in quartz is covalently bonded to four oxygen atoms, resulting in a strong and stable crystal structure. It is found in many rock types and is the stable polymorph of silicon dioxide at the Earth's surface. Its crystalline forms and robust structure have a vast range of applications, from jewelry to electronic equipment.