The Fluorine name is derived from the Latin Fluere word meaning flow or flux.Fluorine is one of the rare elements found in crustal rocks. Fluorine is the eighteenth element in the earth's crust. Fluorine is the most important source of fluore in nature. This mineral crystallizes in cubic system and can contain rare elements in its network. Fluorine is produced in a wide range of geological conditions and can be found in all sedimentary, igneous and metamorphic conditions. This mineral is usually associated with important deposits of lead, zinc and barite and is therefore of particular importance. Because exploration can also lead to the discovery of these deposits. Also, minerals can be extracted and cultivated, and this results in more valuable fluorine deposits. Some times the presence of fluorine itself makes the deposits of other minerals more valuable. Therefore, in the technical-economical investigations, deposits of lead, zinc, barite and fluorine were to be given particular attention to associated minerals. Because these minerals may have an impact on the economics of a deposit.Fluorine in nature, except in small amounts in the case of radioactive matter, is not free. Currently, fluorine is the most important source of fluore in the mass of fluore minerals. But too much fluorine can be obtained from phosphate rocks. Research shows that fluore sources can be used to extract sulfide or barite minerals from topaz, with sulfide and lateral products.In terms of fluorine color, it can appear in crystalline form or in various colors such as yellow, blue, purple, green, red, blackish or blue and brown.The study of the absorption spectra of natural crystals of fluorine has shown that the fluorine color of the origin is three fold. • The color resulting from the presence of electron cavities and their accumulation in pure crystals such as blue violet. • The color resulting from the absorption of rare earth elements or electron cavity centers that appear when the crystals are activated by gross ions like green, pink, blue and yellow. • The color due to the presence of both impurity ion absorption phenomena and the presence of unfilled electron cavities of some yellow, green, blue, and violet in this case fluorines show ultra violet light or cathode flame from their own fluorescence properties.Also, if it stays in the sun for too long, it will blot or change color. For example, the green variety of these minerals is purple in the sun. At present, there is only a small amount of pure mineral fluorine that does not require purification. Also, based on impurities of mineral fluorine spar ,there are various processes to enhance the purity of this material.
Fluorine is used in various industries and in different granulations. For example:Concentrations up to 70% of ceramic, glass, metallurgical, dyeing industries. . .Concentration of 70 to 75% for steel plant, white cement and. . .Concentration of 80 to 85% for glaze, ceramics, glass, metallurgical industry. . .Concentration of 97% sulfuric acid production, powder for glass fiber, weld electrod and is generally produced in four grades.