Scheelite - one of the few natural tungstate, which, coupled with the extensive use in the industry makes him a valuable mineral. The main feature of the scheelite is a bright glow in ultraviolet light. In this light scheelite becomes white and blue, or yellow.
Unusual mineral
Although scheelite - a rare mineral, its gorgeous crystals were found in many places. Scheelite crystals are transparent or translucent, and are presented in a variety of colors - from colorless to brown with a predominance of yellow and orange hues. Their size is usually small, though sometimes in the fields of Korea and Japan have come across instances of length 15-33 cm. In Spain, the beauty known crystals of La Parrilla (province Cáceres) and Estepona (Malaga Province).
Stone for collection
Crystalline and transparent samples scheelite used to make unusual brittle rocks, which lead to his collectors the transparency and color saturation.
"Baptism" scheelite
Was not considered a mineral scheelite until 1821, when he was baptized by the name of the great Swedish scientist Carl Wilhelm Scheele (1742-1786), the discoverer of chlorine and manganese. Scheele was the first person to receive from scheelite acid necessary for subsequent separation of tungsten
Did you know that
The term "tungsten" (also known as tungsten) is derived from the Swedish word "tung-the-wall", which means "heavy stone" and speaks of the high density of this mineral.
Gems of scheelite
very beautiful, but cost less than other precious stones because of their fragility.
Versatile material
Tungsten, used initially in dyeing by the highest heat resistance for part century has become an indispensable raw material for the defense and aerospace industry and electronics.
Scheelite - a major source of tungsten, a metal that has wide industrial applications and high economic value because of the highest heat resistance: tungsten melts at temperatures above 3410 ° C.
The new element
Discovery of tungsten in three phases: in 1779 German Peter Wolf discovered that the mineral known today under the name of wolframite, contains unknown science stuff. Then, in 1781, the Swedish chemist Scheele was tungstic acid from another mineral, now known as scheelite. Finally, in 1783, the Spanish chemists brothers d'Eluyar discovered that the acid produced from wolframite, scheelite produced from identical and in the same year identified a new element.
Humble beginnings
While tungsten is used primarily in dyeing to fix krasok.Germaniya first began using tungsten in the production of special steel alloys for the defense industry and the machine tool industry.
Scope
Tungsten is used to make light bulbs and, because of its resistance to high temperatures is in the production of electric valves, radio and X-ray equipment. Today it is widely used in the aerospace industry for the manufacture of the bow of the missiles
Unforgivable gaffe
V1913, a year before the outbreak of the First World War, the British were assured of absolute futility of tungsten. Germans, to uncover the secrets of metal, kindly offered to buy the English they have this "garbage". Englishmen gladly accepted, thinking it was a great deal, but the war showed them how they were wrong. To their horror, they discovered that the great weapon of the enemy made their own tungsten deposits of Cornish. That's when it became apparent that the knowledge can be much more dangerous weapon than a gun.
Where scheelite occurs
The largest deposits of scheelite are in China, Korea, the UK, Brazil, the U.S. and Spain.
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