Chalcogen, Non-disordered, Transitional, Temperature for congruent melting

• O-V
• S-Zn
• O-Ti
• C-Cu-H-N-O
• Fe-H-O-P
• transitional
• chalcogen
• non-disordered
• quaternary
• monoclinic
• orthorhombic
• tetragonal
• trigonal
• triclinic