C-H-N-O, Chalcogen, Pnictogen, Temperature for congruent melting

• C-Cu-H-N-O
• C-Cl-H-N-O
• C-H-N-Na-O
• C-Co-H-N-O
• organic
• pnictogen
• chalcogen
• hydrate
• monoclinic
• orthorhombic
• triclinic
• hexagonal
• tetragonal