Alkali, Chalcogen, Kiefte

• H-Li-N-O-S
• H-Li-O-Rb-S
• Cs-Li-O-S
• K-Na-O-Se
• Cr-K-Na-O
• mechanical properties
• elasticity
• elastic stiffness coefficient
• optical properties
• alkali
• chalcogen
• nonmetal
• sulfate
• quinary
• tetragonal
• monoclinic
• orthorhombic
• trigonal