Gd-Nb, Lanthanoid, Rare earth, Phase transitions

• Fe-Gd-Nb
• Gd-Na-Nb-O
• Gd-Nb-O
• Ba-Gd-Nb-O
• Al-Gd-Nb
• phase diagram
• temperature for congruent melting
• fusion
• structural transitions
• rare earth
• lanthanoid
• transitional
• chalcogen
• quaternary
• cubic
• tetragonal
• orthorhombic
• monoclinic
• trigonal