Chalcogen, Transitional, Structural transitions

• Ba-O-Ti
• Fe-Te
• S-Ta
• Ca-La-Mn-O
• Fe-O
• temperature for structural transition
• pressure for structural transition
• structural transition
• chalcogen
• transitional
• oxide
• disordered
• nonmetal
• orthorhombic
• tetragonal
• cubic
• monoclinic
• trigonal