Alkali, Chalcogen, Non-disordered, Nonmetal, Elastic stiffness coefficient

• H-K-O-P
• N-Na-O
• C-H-K-O
• H-O-Rb-Se
• Li-O-Rb-S
• nonmetal
• non-disordered
• alkali
• chalcogen
• ferroelectric
• orthorhombic
• monoclinic
• tetragonal
• cubic
• trigonal