Alkali, Chalcogen, Disordered, Nonmetal, Elastic stiffness coefficient

• H-K-O-P
• Ba-K-N-O
• N-Na-O
• Ba-Na-Nb-O
• C-H-K-O
• disordered
• nonmetal
• alkali
• chalcogen
• ferroelectric
• orthorhombic
• tetragonal
• trigonal
• monoclinic
• cubic