Alkali, Transitional, Structural transitions

• K-Na-Nb-O
• Na-Nb-O
• Na-O-V
• Bi-Na-O-Ti
• As-Ba-Fe-K
• temperature for structural transition
• pressure for structural transition
• structural transition
• alkali
• transitional
• chalcogen
• oxide
• nonmetal
• orthorhombic
• tetragonal
• cubic
• monoclinic
• trigonal