Phase transitions, Piezoelectric, Tetragonal

• Mg-Nb-O-Pb-Ti
• H-K-O-P
• K-Na-Nb-O
• O-Pb-Ti
• H-O-P-Rb
• structural transitions
• temperature for structural transition
• temperature for congruent melting
• fusion
• pressure for structural transition
• piezoelectric
• chalcogen
• nonmetal
• ferroelectric
• transitional