Sulphur

Crystal system: Orthorhombic departments or monoclinic 
Chemical composition: S 
Characteristics: Chalcogenide basic chemical raw materials widely used in chemical industry, metallurgy, agriculture, petroleum, military industry and other fields, natural sulfur mainly in the areas of volcanic activity, and its cleavage is not complete, fracture uneven to conchoidal to shape, dense De was varied form, pure sulfur has a distinctive yellow. Traits very crisp, with pine resin sheen, white streak, hardness 1.5 to 2.5, the proportion of 1.9 ~ 2.1. 120 ℃ in the melting, 270 ℃ burning blue flame, it will become for SO2. 
Occurrence: natural sulfur from volcanic vents, as well as mine dye sublimation or precipitation generated, double-cone crystal, irregular or massive bell emulsion, earthy and so on. In addition to self-extract oil and natural gas associated with the recovery of hydrogen sulfide, known as the recovery of sulfur. 
Purposes: to create sulfuric acid, carbon disulfide and various sulphides medicines, agricultural fertilizer, photographic film, synthetic fiber, paper pulp, bleaching agents, pesticides, explosives, matches and other manufacturing, as well as the rubber industry and the increase of sulfur powder, such as soil improvement.