Phase transitions, Piezoelectric, Transitional, Tetragonal

• Mg-Nb-O-Pb-Ti
• K-Na-Nb-O
• O-Pb-Ti
• K-Nb-O
• Ba-Nb-O-Sr
• structural transitions
• temperature for structural transition
• temperature for congruent melting
• fusion
• transitional
• piezoelectric
• chalcogen
• ferroelectric
• nonmetal