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Selenium metal

General characteristics

Selenium is more brittle, lustrous, black on cross-sectional view non-metal. It is the 34th element of periodic system, where it is designated as Se. Its name derived from name of moon in Greek. Its content in earth crust constitutes about 500 mg/t. Sulfide deposit occurrences possess the main industrial importance. Sometimes, there can be met native impurities. Its concentration in ocean constitutes about 410-4 mg/l. This element is usually obtained out of slime from copper electrolytic industries.

Chemical properties

By chemical properties, selenium is an analog of sulfur. It can be oxidizing agent with a valency of -6 or reducing agent with a valency of +2. Oxidizing is performed less intensively. It cannot burn in air by itself as sulfur can. It can be burnt up only after heating. It flames with a sickly blueish flame by turning into dioxide SeO2. It extensively reacts with alkali metals in molten state.

Physical features

Se has a few modifications in hard state. Grey selenium is more resistant, red is amorphous and less resistant. Grey selenium smelts at heating and starts vaporizing with brown steam puffs at further heating. Steam is condensated in a form of red allotropic crystals at shock cooling.

Physical properties of Se

Description Identification
Atomic (molal) weight mole/h 78.96
Oxidation rate 6, 4, -2
Density [g/cm3]

4.79
Melting point 117°С
Melting heat kJ/mole 5.23
Heat conductivity K [V/m*K] 0.52
Evaporation heat kJ/mole 59.7

Application

The most important properties of many compounds of this element (selenides) are semi-conducting properties that are kept in alloy with other components. Nowadays, there are used selenides of bismuth, antimony, lead, tin, lanthanides for manufacture of modern semi-conductors. There are very important photoelectric and thermoelectric properties of selenides as well. 74 Se is a stable isotope that can serve as a basis for ultraviolet powerful plasma laser. Radioactive isotope 75 Se is utilized for flaw detection as a powerful source of gamma-rays. Microadditives are used in medicine, agriculture, pharmaceutical materials, vitamin products. Quality of engineering selenium is specified by GOST 10 298−79.

Selenium metal supplier

«Auremo» supplier offers to buy selenium metal by wholesale. A wide range of grades is presented in stock. They comply with GOST and International Standards of quality. Selenium ingot is always in stock. You can buy goods for the best price from selenium metal supplier. Buy selenium metal right now. Selenium metal price is privileged for wholesale buyers.

Buy at a bargain price

A huge range of semi-fabricates can be delivered by wholesale for reasonable price from «Auremo» selenium metal supplier. Selenium metal price forms according to technological details of production without including additional expenses. All products are certificated. When there is a need, products can pass through an additional checking. We have the shortest terms of supply. We are working with experienced managers who are always ready to answer all your questions. Mill-products of rare metals are always in stock. You can buy them for affordable selenium metal price from supplier. If you buy selenium metal by wholesale, you will be given special discounts.

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