Aleonard, Alkali, Halogen

• Er-F-K
• F-K-Yb
• Er-F-Rb
• Cs-F-Yb
• Cs-Er-F
• structural properties
• phase transitions
• phase diagram
• alkali
• halogen
• fluoride
• non-disordered
• cubic
• monoclinic
• hexagonal
• orthorhombic
• trigonal