Nd(x)AE(2-x)MnO(4) (+/-) (delta) (AE: Ca, Sr) manganites with x = 0.25, 0.4, 0.5 and 0.60 are part of the Ruddlesden-Popper family of generic formula A(n+1)B(n)O(3n+1) with n = 1. The compositions range that can be successfully synthesized by the sol-gel method in air has been identified. While Sr compounds are stable in reducing atmosphere (3% H-2/Ar - 850 degrees C/16 h), Ca ones decompose when submitted to such atmosphere. Nd0.5Sr1.5MnO4 (+/-) (delta) was analyzed by High-Temperature X-ray diffraction (HT-XRD) showing TEC values of 12.7 x 10(-6) K-1 and 14.4 x 10(-6) K-1 in air and 3% H-2/N-2 (25-800 degrees C), respectively. Using standard conditions for electrode elaboration, the material reacts with YSZ electrolyte, but is chemically compatible with GDC electrolyte. A small polaron-type behavior is observed for the electrical conductivity of Nd0.5Sr1.5MnO4 (+/-) (delta )in air and 3% H-2/Ar, with respective values of 33.4 S cm(-1) and 0.9 S cm(-1) at 800 degrees C, meeting the preliminary requirements for use as symmetrical SOFC electrode.