Alkali, Chalcogen, Fusion, Na-Nb-O

• K-Na-Nb-O
• Na-Nb-O-Sr
• Ag-Na-Nb-O
• F-Na-Nb-O
• temperature for congruent melting
• chalcogen
• transitional
• alkali
• oxide
• orthorhombic
• tetragonal
• cubic
• monoclinic
• trigonal