Electronic and electrical properties, Ge-Se, Ge-x polyhedra, Tetragonal

• Ge-Hf-Se
• Ge-Ni-Se
• Cu-Ga-Ge-Se
• Cu-Ge-S-Se-Zn
• Ge-Se-U
• effective mass
• electrical conductivity
• values of electronic energy gap
• electronic energy gap
• conductivity or resistivity
• chalcogen
• metalloid
• selenide
• transitional