High Purity Selenium is a amorphous red powder, becoming blacken on-duty remaining firm and crystalline upon heating system; glazed and colloidal forms possibly educated. Uncrystallized configuration moderates at 40 °C and melts at 217 °C . Electrically, it acts as a rectifier, and has checked off photoconductive and photovoltaic action mechanism (changes over refulgent to electrical energy). The electrical conductivity emergences with increasing luminance radiation therapy.
Selenium is a chemical element with the atomic number 34, represented by the chemical symbol Se, an atomic mass of 78.96. It is a nonmetal, chemically related to sulfur and tellurium, and rarely occurs in its elemental state in nature. It is mainly used for preparation of toner materials, photoelectric materials, electrostatic materials, photography, and other optical instruments.
Interpretable fashionable centralised nitric acrid and incoming (liquidity form) most common alkalies. Conformations binary alloys with silver, copper, zinc, lead, etc. Melting point :494. Depressed perniciousness. A requirement nutritional factor for animals. Crystalline selenium is a p-type semiconductor.
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