Synthesis and Characterisation of BaMIV(PO4)2 in the View of Conditioning of the Actinides
We present here a systematic study on the BaMIV(PO4)2 double phosphates. We successfully synthesized the compounds with MIV = Ti, Zr, Hf, Ge, Sn and Th. Several attempts to obtain the compounds with MIV = Pb, Re, Ce, U and Np have been also performed and the preliminary findings are discussed here. In agreement with previous studies, the BaMIV(PO4)2 (MIV = Ti, Zr, Hf, Ge and Sn) compounds crystallize in the C1 2/m 1 space group (yavapaiite structure), while BaTh(PO4)2 exhibit a different structure. The results on the stability of the BaZr(PO4)2 and BaHf(PO4)2 yavapaiite-like compounds upon heating and cooling are presented.
K. Popa et al., "Synthesis and Characterisation of BaMIV(PO4)2 in the View of Conditioning of the Actinides", Advances in Science and Technology, Vol. 45, pp. 2012-2017, 2006