Alkali, Chalcogen, Quaternary, Monoclinic, Structural transitions

• K-Na-Nb-O
• H-Na-O-Se
• Cs-H-O-P
• Cs-H-O-S
• H-O-Rb-Se
• temperature for structural transition
• pressure for structural transition
• pressure derivative of transition temperature
• structural transition
• quaternary
• chalcogen
• alkali
• non-disordered
• nonmetal