Chalcogen, Disordered, Oxide, Electronic energy gap, Trigonal

• Ni-O
• Bi-Fe-O
• Fe-O
• Al-O
• Co-La-O
• values of electronic energy gap
• energy gap for direct transition
• energy gap for indirect transition
• polaron formation energy
• charge-transfer energy
• oxide
• disordered
• chalcogen
• transitional