Tri-calcium Ca3(PO4)2 phosphate materials (TCP) show interesting biological and optical properties1-2 for its use in applications related with luminescence and biomaterials field 3 . The purpose of this study is to synthesize tricalcium phosphate powders with dual dopants of trivalent lanthanides (Ln= La, Pr, Nd, Eu, Gd, Dy, Tm, Yb) and divalents transition metals (M=Mn,Ni) by a conventional solid state reaction at high temperature with CaCO3, CaHPO4, Ln2O3 and metal oxides as precursors . s
