La-Ta, Oxide, Rare earth, Phase transitions

• La-O-Ta
• La-Li-O-Ta
• Cu-La-O-Sr-Ta
• La-O-Pb-Ta
• La-Na-O-Ta
• fusion
• temperature for congruent melting
• temperature for structural transition
• structural transitions
• phase diagram
• rare earth
• lanthanoid
• chalcogen
• oxide
• transitional
• tetragonal
• orthorhombic
• cubic
• monoclinic
• trigonal