Ang selenium ay isang pula o kulay-abo na pulbos, na may kulay abong metal na kinang na parang - metal.Sa anim na kilalang solid allotroph, tatlong kristal (α monoitalic, β monoitalic, at gray triangulite) ang pinakamahalaga.Ang grey hexagonal crystal system ay ang pinaka-stable na may density na 4.81g/cm3.
Mayroon din itong tatlong amorphous solid form: dalawang amorphous glassy form ng selenium, pula at itim.Ang dating ay malutong at may density na 4.26g/cm3.Ang huli density ay 4.28g/cm3, ang isa ay colloidal selenium.
Purong metal Selenium granules komposisyon | |||||
Modelo | 3N | 4.3N | Se.4N | Se.5N | Se.6N |
Se(Min%) | 99.9 | 99.99 | 99.999 | 99.9999 | |
karumihan | MAX PPM | ||||
Cu | 10 | 5 | 3 | 0.2 | 0.05 |
Ag | 30 | 5 | / | 0.2 | 0.05 |
Mg | / | 10 | 8 | 0.5 | 0.1 |
Sb | 10 | / | 5 | 0.5 | / |
Ni | 20 | 10 | 5 | 0.2 | 0.05 |
Bi | / | 10 | 5 | 0.5 | 0.05 |
In | / | / | / | 0.5 | 0.05 |
Fe | 400 | 10 | 10 | 0.5 | 0.1 |
Cd | / | / | / | 0.2 | 0.05 |
Te | 70 | 5 | 10 | 0.5 | 0.1 |
SI | / | 10 | 9 | 0.5 | / |
Al | 10 | 8 | 0.5 | 0.05 | |
Pb | 300 | 10 | 5 | 0.5 | 0.05 |
Sn | 10 | 5 | / | / | |
S | 200 | 10 | 40 | / | / |
As | 30 | 5 | / | / | / |
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1. Paggawa:selenium(I) chlorid,Selenium dichloride,Selenides, mercury selenide.
2. Science high technology industry:lead selenide,zinc selenide, copper indium gallium diselenide.
3. Electric: semiconductors,electropositive na metal,Tetraselenium tetranitride.
4. Chemistry:Selenols,selenium isotope,Plastics, photographic exposure.
5. Application sa industriya: Paggawa ng salamin, selenium drum, electrostatic photograph, optical instrument.