Alkali, Chalcogen, Orthorhombic, Structural transitions

• Na-Nb-O
• H-Li-N-O-S
• H-K-O-P
• Na-O-V
• K-Na-Nb-O
• temperature for structural transition
• pressure for structural transition
• pressure derivative of transition temperature
• alkali
• chalcogen
• transitional
• nonmetal
• ferroelectric