“…Phosphate materials have been the subject of numerous investigations for many years due to their remarkable physical properties like ferroelectric, fluorescent, and ion-exchange properties [1][2][3][4][5]. For instance, double diphosphate with a general formula A I M III P 2 O 7 (A I = Li, Na, K, Rb, Cs and Ag; M III = Al, Ga, Cr, Fe, In, Y) have been studied by both chemists and physicist hence gained intensive development due to the potential applications such as ionic conductors [6], linear and non-linear optical components [7,8].…”