Chalcogen, Deuterium, Pnictogen, Temperature for structural transition

• H-N-O-Se
• Cl-H-N-Te
• H-K-O-P
• As-H-K-O
• Cs-H-O-P
• chalcogen
• deuterium
• pnictogen
• quaternary
• nonmetal
• monoclinic
• orthorhombic
• tetragonal
• triclinic
• cubic