Pulvis amorphous rufus, niger factus, stans et crystallina in calefactione;formae vitreae et colloidales praeparentur.
Amorphous forma XL °F emollit et liquefacit ad 217 °C.Raro accidit in statu elementali in natura, aut sicut in mixto ore puro.
Symbolum: | Se |
CAS | 7782-49-2 |
Numerus atomicus: | 34 |
Pondus atomicus: | 78.96 |
Densitas: | 4.79 gm/cc |
Liquescens punctum: | 217 oC |
Ferveret: | 684.9 oC |
Scelerisque conductivity: | 0.00519 W/cm/K @ 298.2 K |
Resistivity electrica: | 106 microhm-cm @ 0 oC |
Electronegativity: | 2.4 Paulings |
Imprimis Caloris: | 0.767 Col/g/K @ 25 oC |
Calor vaporis; | 3.34 K-cal/gm atomus ad 684.9 oC |
Calor eget. | 1.22 Col/gm mole |
Brand | Epocha-Chem |
1 Vestibulum: selenium chloridum, Selenium dichloridum, Selenides, mercurialis selenide.
2 Scientia alta technicae industriae: plumbum selenide, selenide, aes indium gallium diselenide.
3 Electric: semiconductores, metalla electropositiva, Tetraselenium tetranitridum.
4 Chemia: Selenols, selenium isotope, Plastics, detectio photographica.
5 Industry application:Glass faciens, selenium tympanum, photographs electrostatic, instrumentum opticum.