The Description of Selenide Metal

Amorphous selenium is either a reddish powder or a black, vitreous solid; crystalline selenium is either red or gray, depending on the crystal structure. 

This element resembles sulfur in its various forms and in its compounds. 

Selenium has many electrical properties, being both photovoltaic, where light converts to electricity, and photoconductive, where electrical resistance decreases with increases illumination. 

Below its melting point, selenium is p-type semiconductor.

Typical Applications

Production of light sensitive surfaces (photocopier machine drums, decolorization of container glass, tinting of architectural glass), pigments for plastics, glass, ceramics and paint, additive to stainless steel; used in manufacture of semiconductors and rectifiers; additive to pharmaceutical and nutritional preparations.