C-H-N-O, Chalcogen, Coplanar triangle 3-vertex, Phase transitions

• C-Cl-H-N-O
• C-Cu-H-N-O
• C-H-K-N-O
• C-H-N-Na-O
• fusion
• temperature for congruent melting
• structural transitions
• decomposition temperature
• decomposition
• chalcogen
• organic
• pnictogen
• non-disordered
• monoclinic
• triclinic
• orthorhombic
• trigonal
• tetragonal