Alkali, Transitional, Ionic conductivity, Orthorhombic

• Nb-O-P-Rb-Ti-Yb
• Nb-O-P-Rb-Ti
• O-P-Rb-Ti-Yb
• Li-O-P-Sc
• O-P-Rb-Ti
• alkali
• transitional
• conductor
• chalcogen
• disordered