Alkali, Chalcogen, Non-disordered, Pressure for structural transition

• Cs-H-O-S
• Na-O-V
• H-K-O-P
• K-Nb-O
• I-K-O
• non-disordered
• alkali
• chalcogen
• nonmetal
• ternary
• monoclinic
• orthorhombic
• trigonal
• cubic
• tetragonal