Chalcogen, Cyanide, Organic, Transitional, Temperature for congruent melting

• C-Fe-H-N-O
• C-Cu-H-N-O
• C-Fe-H-K-N-O
• C-Fe-H-N-Ni-O
• C-Fe-H-Mn-N-O
• organic
• chalcogen
• cyanide
• pnictogen
• orthorhombic
• monoclinic
• cubic
• hexagonal
• triclinic