Explanation
Sulfate minerals with simple island like structures. A small amount of strontium and barium replace calcium. The rhombic crystal system is composed of dense blocks or fibers. It is white with light blue, light gray or light red, and red or brown when containing iron oxide or clay. The internal color of the stripe or gray white. glass luster, cleavage surface pearly luster. powder is soluble in sulfuric acid. It is mainly produced in salt lakes and is the product of chemical sedimentation. It is often associated with halite, potassium salt, camallite, etc., and transformation into gypsum through hydration; It also occurs in hydrothermal veins and volcanic rock pores. It is widely used in agriculture, cement, ceramics, architecture, paper making, coatings, model, medical treatment and other fields.
Classification
Natural materials and products -> Mineral materials