The solid solution row A 1−3x Eu 3+ x Zr 2 (PO 4 ) 3 , where A = Na, K, Rb, Cs and x ranging from 0 to 0.25 was obtained by methods based on sol-gel processes in the presence of the salting-out agent, C 2 H 5 OH. The formation of phases of the structural type NaZr 2 (PO 4 ) 3 (NZP) and their crystallization in the crystal forms belonging to the space group R3c (0 ≤ x ≤ 0.1) and P3c (x = 0.25) were determined. Morphotropic transition occurred. Trivalent europium was included as a local probe.

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... electric and magnetic dipole was used to characterize the substitution rule and the localization of this cation in the structure, which is in agreement with the structural characterization. It appears that europium is located in the M1 and M2 sites as a function of the Eu 3+ concentration.