KS7108 Alpha- Quartz (Two Cells) Molecular Model

Alpha- Quartz (Two Cells) Molecular Model Quartz has a formula unit composition of SiO2 and is classified as a Tectosilicate. Alpha-quartz is the most common polymorph of the silica minerals. Other polymorphs include beta-quartz, tridymite, cristobalite, and silica glass, which has a short-range ordered structure.All four oxygens in quartz are polymerized to additional silica groups; all silica tetrahedra are polymerized to 4 other tetrahedra. In its characteristic crystal form, Quartz has a hexagonal structure. Quartz is the most stable and most common form of silica and is the most common silicate mineral in the Earth's crust. It has also been found in some lunar rocks and meteorites. In pure form, Quartz is transparent, clear, and colorless, but it is often colored by impurities to produce crystals of white (milky quartz), pink (rose quartz), amber, gray (smoky quartz), purple (amethyst), and other colors. There are more variety names given to Quartz than any other mineral. Quartz i