Explanation

General term for fibrous silicate mineral and fibrous hydroxide minerals. Commercial terms. It often appears as an aggregate. It can be separated into very fine fibers by mechanical method and will not combustion in fire, so it is called asbestos. It includes amphibole asbestos of chain silicate, serpentine asbestos of layered silicate and brucite asbestos of layered hydroxide. The industrial value includes: ① riebeckite (also known as blue asbestos or crocidolite), light blue or light blue gray; Fiber has strong acid resistance, but poor tensile strength; It is mainly produced in blue schist or sodium metasomatized schist: ② chrysotile asbestos (also known as chrysotile asbestos or low-ferroasbestos). The chemical formula is light yellow green or blue green. The fiber has high tensile strength and poor acid resistance. Both asbestos and asbestos produced in serpentinite fissures are made into asbestos products, which are used in heat insulation, insulation, fire prevention and other fields. crocidolite is also used to filter toxic gases. It is a strategic material.

Classification