Tourmaline
First,the nature and structure of tourmaline Tourmaline is a characterized by a boron-containing aluminum, sodium, iron, lithium annular structure of silicate minerals, its chemical formula for NaR3Al6 [Si6O18] (BO3) 3 (OH) 4.
Tourmaline its process name called "Bi Yuxi", that is, tourmaline gemstones class collectively referred to as "Bi Yuxi," tourmaline because, transparent flaws, and thus have attracted people's favorite, ranking midrange precious stones as well. Tourmaline colors vary with different components, iron-rich tourmaline was black, rich in lithium, cesium of manganese and tourmaline , also known as light-blue; rich in magnesium tourmalinebrown and yellow , the chromium-rich tourmalinegreen. Tourmaline has glass sheen, no cleavage, hardness 7.0-7.5 with brittle, the share of 3.03-3.25 g/cm3, and a thermoelectric and piezoelectric.
A columnar tourmaline crystal, a rod assemblies, radial, small needle-like, or a dense block implicit crystallized form. I mainly black tourmaline processing plants that mainly iron tourmaline, according divided into crystal-like shape (hexahedron structure) and loose fibrous two.
tourmaline also applied to other areas:
① tourmaline high purity materials can be used as gems, jewelry made from various attachments necklaces, bracelets, etc.;
② antibacterial deodorant wallpaper, floor, ceiling, furniture, interior wall paint and concrete;
③ antibacterial preservation, and packaging materials such as plastic film, the box and wrapping paper and carton boxes, and so on;
④ cigarette filters health filler;
⑤ water and air purification materials;
⑥ toothpaste, cosmetics and other additives;
⑦ antibacterial coating or coating materials used in electronic equipment, household appliances and daily life commodities;
⑧ has antibacterial, disinfection, deodorant, and other functions of far-infrared radiation composite ceramics.