What is quartz?


Quartz is one of the main rock forming minerals, generally referred to as low temperature quartz (α – quartz), which is one of the most widely distributed minerals in the quartz group. Generalized quartz also includes high temperature quartz (β – quartz) and coesite. The main component is SiO 2, which is colorless and transparent, often contains a small amount of impurities, and becomes translucent or opaque crystal, hard.

Quartz is a kind of mineral resource with stable physical and chemical properties, and its crystal belongs to the oxide mineral of cubic system. Quartz block, also known as silica, is mainly the raw material for producing quartz sand (also known as silica sand), as well as quartz refractory and raw material for firing ferrosilicon.

Quartz is a mineral composed of silicon dioxide with the chemical formula of SiO 2. The pure quartz is colorless and transparent, and has various colors due to the presence of trace pigment ions, dispersed inclusions or color centers. The fracture surface is glassy and greasy. The hardness is 7 and the fracture surface is shell like. 65. With piezoelectric properties.

The colorless and transparent quartz, known as “krystallos” by Greeks, means “white ice”. They are convinced that quartz is durable and solid ice. Ancient Chinese believed that cold crystal in the mouth could quench thirst.

On October 27, 2017, the list of carcinogens published by the international agency for research on cancer of the World Health Organization (who) was preliminarily sorted out. For reference, crystalline silica dust in the form of quartz or cristobalite is included in the list of class I carcinogens.

Quartz is one of the most widely distributed minerals on the surface of the earth. There are many types of quartz. The raw materials for daily ceramics include vein quartz, quartz sand, quartzite, sandstone, silica, opal, diatomite, etc. With ordinary sand, crystal is “with the birth of a kind of material.”. When silica crystallizes perfectly, it is crystal. After silica gels and dehydrates, it is agate. After silica water colloid solidifies, it becomes opal. When the grain size of silica is less than a few microns, it forms chalcedony, chert and secondary quartzite.

It is also widely used. As far back as the stone age, people used it to make stone axes, stone arrows and other simple production tools to hunt for food and fight against the enemy.
Piezoelectric quartz is used as standard frequency in quartz clock and electronic equipment. The fused glass can be used to make optical instruments, glasses, glass tubes and other products. It can also be used as bearing, grinding material, glass ceramics and other industrial raw materials for precision instruments.

Quartz is a non plastic raw material. The mullite crystal formed by quartz and clay in high temperature gives porcelain higher mechanical strength and chemical stability, and increases the translucency of green body. It is a good raw material for preparing white glaze.

After the founding of the people’s Republic of China, quartz from Xingzi, Duchang, Xiushui and other places was mostly used.Especially after 2000, the amount of quartz increased sharply.

During the period of the Republic of China, quartz from xiasanbaopeng village of Jingdezhen was mostly used. The amount of glaze is 10% ~ 30%. Before use, it should be cleaned and selected to remove the dirt and impurities. It should be calcined in the kiln at high temperature for easy crushing.

Quartz is the main mineral component of silica ore. The silicon content is 46.70%. It can be divided into low temperature quartz (α – quartz) of cubic system and high temperature quartz (β – quartz) of hexagonal system. Generally speaking, quartz refers to low temperature quartz. The crystal is hexagonal columnar and bicrystal is very common. It is usually in the form of crystal cluster, material and massive aggregate. In a variety of colors, colorless and transparent is called crystal, milky white is called milk quartz, purple is called Amethyst, light rose is called Rose Quartz, smoke is called smoke crystal, Brown is called tea crystal, etc. The hardness is 7 and the density is 2.65g/cm3. Insoluble in any acid except hydrofluoric acid. One of the most widely distributed minerals in the earth’s crust is the mineral composition of various rocks and deposits. It is used to make silica gel, water glass and various silicides and silicates, as fillers for plastics and rubber. Also widely used in glass, ceramics, petroleum, metallurgy, casting, building materials and other departments.

About the physical and chemical properties and resource distribution of powdered quartz
What kind of substance is high-purity quartz sand?