Alkali, Chalcogen, Nonmetal, Orthorhombic, Structural transitions

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