C-x polyhedra, Electronic energy gap, Organic

• C-H-N-O
• C-H-N
• C-Cu-H-N-O
• C-Cl-H-N-O
• C-H-K-N-O
• values of electronic energy gap
• energy gap for direct transition
• energy gap for indirect transition
• thermal energy gap
• organic
• chalcogen
• non-disordered
• pnictogen
• monoclinic
• triclinic
• orthorhombic
• tetragonal
• trigonal