F-Gd, Halogen, Phase transitions

• F-Gd-O
• F-Gd-K
• Ba-F-Gd
• Ca-F-Gd
• F-Gd-Rb
• fusion
• temperature for congruent melting
• phase diagram
• structural transitions
• halogen
• rare earth
• lanthanoid
• fluoride
• cubic
• trigonal
• tetragonal
• hexagonal
• orthorhombic