Oxide, Tetragonal bronze, Transitional, Phase transitions

• K-O-Pb-Ta
• K-Nb-O-Pb
• F-K-Nb-O-Sr
• Ba-Na-Nb-O
• La-O-Pb-Ta
• fusion
• temperature for congruent melting
• structural transitions
• temperature for structural transition
• phase diagram
• transitional
• oxide
• chalcogen
• tetragonal bronze
• disordered
• tetragonal
• orthorhombic