La-Ta, Temperature for congruent melting, Transitional

• La-O-Ta
• Cu-La-O-Sr-Ta
• La-Li-O-Ta
• Eu-La-O-Ta
• Ba-La-O-Ta
• transitional
• lanthanoid
• rare earth
• chalcogen
• cubic
• tetragonal
• orthorhombic
• monoclinic
• trigonal