Na-Nb-O, Nb-x polyhedra, Phase transitions, Transitional

• K-Na-Nb-O
• Li-Na-Nb-O
• K-Li-Na-Nb-O-Sb-Ta
• Na-Nb-O-Sr
• structural transitions
• fusion
• temperature for congruent melting
• temperature for structural transition
• chalcogen
• transitional
• alkali
• oxide
• disordered
• orthorhombic
• tetragonal
• cubic
• trigonal
• monoclinic