Alkali, Chalcogen, Temperature for structural transition

• K-Na-Nb-O
• Na-Nb-O
• Bi-Na-O-Ti
• H-Li-N-O-S
• K-Li-O-S
• alkali
• chalcogen
• transitional
• nonmetal
• oxide
• orthorhombic
• tetragonal
• monoclinic
• cubic
• trigonal