C-H-N-O, O-x polyhedra, Phase transitions

• C-Cu-H-N-O
• C-H-K-N-O
• C-Co-H-N-O
• C-H-N-Na-O
• temperature for congruent melting
• fusion
• structural transitions
• decomposition
• decomposition temperature
• pnictogen
• organic
• chalcogen
• hydrate
• monoclinic
• triclinic
• orthorhombic
• tetragonal
• cubic