Electronic and electrical properties, Er-H, Er-x polyhedra, Triclinic

• Er-H-Na-O-W
• Er-H-K-O-Si-W
• Er-H-N-O
• Er-H-O-S
• Al-Er-H-Na-Nb-O
• effective mass
• electrical conductivity
• electronic energy gap
• values of electronic energy gap
• conductivity or resistivity
• rare earth
• lanthanoid
• chalcogen
• hydrate