Alkali, Chalcogen, Ferroelectric, Nonmetal, Elastic stiffness coefficient

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