Alkali, Transitional, Kartashev

• Na-Nb-O
• Fe-Ge-Li-O
• F-K-Mo-O-Rb
• Cs-F-Mo-O-Zn
• Fe-Ge-Na-O
• thermal and thermodynamic properties
• magnetic properties
• structural transitions
• phase transitions
• temperature for structural transition
• transitional
• alkali
• chalcogen
• oxide
• non-disordered
• orthorhombic
• cubic
• monoclinic
• trigonal
• tetragonal