F-K, Fluoride, Fusion

• F-Fe-K
• F-K-Sb
• Cr-F-K
• Er-F-K
• F-K-Tb
• temperature for congruent melting
• halogen
• fluoride
• alkali
• non-disordered
• cubic
• monoclinic
• orthorhombic
• tetragonal
• trigonal