Chalcogen, Nonmetal, Transitional, Structural transitions

• Ba-O-Ti
• Mg-Nb-O-Pb-Ti
• Fe-O
• K-Na-Nb-O
• S-Ta
• temperature for structural transition
• pressure for structural transition
• structural transition
• transitional
• chalcogen
• nonmetal
• oxide
• disordered
• orthorhombic
• tetragonal
• cubic
• monoclinic
• trigonal