???Ge, Germanium
Germanium is a chemical element with the symbol Ge and atomic number 32. It is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon.
?? ??Ge??? ? ?5.47661?0.7842102???. ??? ?? ??? ? ??? ?????. ??? ????? ? ?? ?? '??'? ???? ?? ??? ??? ? ????.
Refractive Index Reference - Sopra Material Database
??? ???? ???? ???, ??? ?? ??? ????? ????.
?? ?? ??????? ?????? ?? ??? ? ?? ? ?? ??? ??: