HCs[SO4]-a mP24 14

• Cs-H-O-S
• Cs-H-O-Se
• Cs-H-O-S-Se
• Cs-H-N-O-S-Se
• Cs-F-O-S
• phase transitions
• structural transitions
• optical properties
• phonons
• structural properties
• chalcogen
• alkali
• quaternary
• non-disordered
• nonmetal
• monoclinic