... .9%,99.99% ,99.999%,99.9999% Shape:lump, grain, ingotSelenium grain Se99.9%,99.99% ,99.999%,99.9999% Shape:lump ... Se99.9%,99.99% ,99.999%,99.9999% Shape:lump, grain, ingotAppearence and shape: Grey or black glass material, hard but ... brittle.Main application: it is used in semiconductor material, system test, rectifiers, indicates, medicine, chemical industry, metallurgy, glass industry, float glass ...