Alkali, Chalcogen, Non-disordered, Real part of permittivity

• Na-Nb-O
• As-H-K-O
• H-K-O-P
• K-Na-O-Se
• Li-O-Ta
• chalcogen
• non-disordered
• alkali
• nonmetal
• disordered
• monoclinic
• orthorhombic
• tetragonal
• trigonal
• cubic