What is the difference between quartz crystal and quart […]
What is the difference between quartz crystal and quartz glass
1. Different materials
Quartz bai crystal is a mineral composed of silicon dioxide, chemical formula zhiSiO2.
Quartz glass is a special dao industrial technical glass with a single component of silica.
2. Different hardness properties
The pure quartz crystal is colorless and transparent. It contains a variety of colors due to trace pigment ions or finely dispersed inclusions, or there is a color center, which reduces the transparency. With glass luster, the fracture is grease luster. Hardness 7, no cleavage, shell-shaped fracture. The proportion is 2.65. With piezoelectricity.
This glass has a hardness of up to seven Mohs, has high temperature resistance, low expansion coefficient, thermal shock resistance, chemical stability and electrical insulation performance, and can transmit ultraviolet and infrared rays. Crystal, silica and silicide are used as raw materials, which are formed by high temperature melting or chemical vapor deposition. The melting method includes electric melting method and gas refining method.
Characteristics of quartz crystal;
2. With thermoelectricity
3. Refractive index 1.533 ~ 1.541, birefringence difference 0.009, dispersion 0.013
4. Quartz has a strong piezoelectric property (Piezoelectric property), that is, a spark will be generated when the quartz crystal tuning fork is struck hard, which is also the method of flint to get fire.
5. The common inclusions in quartz are: crystals-mainly rutile, grass crystals-mainly tourmaline, water gall crystal-quartz liquid inclusions, turquoise-contains light blue rutile needles, Milky quartz-turbidity caused by fine water holes, green quartz-consists of plate-shaped or fragmented chlorite.
Sometimes it may be green needle-like actinite, aventurine-aventurine-quartzite containing green or reddish brown mica flakes, also known as yao quartz, commonly known as tangling stone. Common smoke black to dark brown smoke crystals, mainly because these rocks contain a large amount of radioactive uranium and thorium elements.