tell me some things about Quartz stone.
Answers
Answer:
Quartz is a chemical compound consisting of one part silicon and two parts oxygen. It is silicon dioxide (SiO2). It is the most abundant mineral found at Earth's surface, and its unique properties make it one of the most useful natural substances. Rock crystal quartz: Transparent "rock crystal" quartz.
Answer:
Quartz is a hard, crystalline mineral composed of silicon and oxygen atoms. The atoms are linked in a continuous framework of SiO₄ silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO₂.
Crystal system: α-quartz: trigonal; β-quartz: hexagonal
Crystal class: α-quartz: trapezohedral (class 3 2);
β-quartz: trapezohedral (class 6 2 2)
Optical properties: Uniaxial (+)
Color: Colorless through various colors to black
Melting point: 1670 °C (β tridymite) 1713 °C (β cristobalite)
Formula mass: 60.083 g·mol−1