Polynuclear coordination precursors compounds for M3Fe5O12 garnets (M=Y, Eu, Gd and Er), Part I: Synthesis of the precursors

Abstract

Anew type of complexes compounds (NH4)6[M3Fe5(C4O5H4)6(C4O5H3)6]. 16H2O (where M(III) = Y, Eu, Gd, Er), (NH4)6[M3Fe5(C4O6H4)6(C4O6H3)6]. 16H2O (where M(III) = Gd, Er) and (NH4)6[M3Fe5(C6O7H10)6(C6O7H9)6]. xH2O (where M(III) = Y; x = 8; M(III) = Eu, Er; x = 22) [C4O5H4 2– = malate anion C4O6H42– = tartarate anion, C6O7H11 – = gluconate anion_ have been synthesized and characterised by elemental chemical analysis and physico-chemical measurements (IR, UV-Vis spectroscopy and magnetic determinations). The synthetic possibilities offered by the use of these new compounds as potential precursors for garnets have been suggested.

Keywords

• garnets precursors
• complexation method