Chalcogen, Deuterium, Nonmetal, Pnictogen, Structural transitions

• H-K-O-P
• Cl-H-N-Te
• H-N-O-Se
• As-H-K-O
• Cs-H-O-P
• temperature for structural transition
• pressure derivative of transition temperature
• pressure for structural transition
• nonmetal
• pnictogen
• chalcogen
• deuterium
• quaternary
• monoclinic
• tetragonal
• orthorhombic
• cubic
• triclinic