Alkali, Disordered, Nonmetal, Structural transitions, Tetragonal

• K-Na-Nb-O
• H-K-O-P
• Bi-Na-O-Ti
• Ba-Bi-Na-O-Ti
• Ba-Na-Nb-O
• temperature for structural transition
• pressure for structural transition
• pressure derivative of transition temperature
• structural transition
• nonmetal
• alkali
• disordered
• chalcogen
• ferroelectric