Chalcogen, Cyanide, Electronic energy gap, Orthorhombic

• C-Fe-H-K-N-O
• C-H-N-O
• C-N-Se
• C-Fe-Hg-N-O
• C-Co-H-N-Nd-O
• values of electronic energy gap
• energy gap for direct transition
• cyanide
• chalcogen
• pnictogen
• transitional