K-Na-Nb-O, Nb-x polyhedra, Structural transitions

• K-Li-Na-Nb-O-Sb-Ta
• K-Li-Na-Nb-O-Sb
• K-Li-Na-Nb-O
• K-Na-Nb-O-Ta
• temperature for structural transition
• disordered
• transitional
• alkali
• chalcogen
• nonmetal
• orthorhombic
• tetragonal
• cubic
• monoclinic
• trigonal