Chalcogen, Transitional, Phase transitions

• Ba-O-Ti
• Fe-O
• Fe-Te
• O-V
• S-Ta
• fusion
• temperature for congruent melting
• structural transitions
• temperature for structural transition
• chalcogen
• transitional
• oxide
• disordered
• orthorhombic
• monoclinic
• tetragonal
• cubic
• trigonal