Fm-x polyhedra, Halogen, Rare earth

• F-La
• Al-Ca-Dy-Er-F-Gd-O-Si-Y-Yb
• structural properties
• electronic and electrical properties
• mechanical properties
• thermal and thermodynamic properties
• optical properties
• fluoride
• rare earth
• lanthanoid
• halogen
• transitional
• trigonal
• hexagonal
• monoclinic