La-Ta, Oxide, Temperature for congruent melting

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