Patent ID: 6489531
Filing Date: 2002-12-03
Classification: C04B,G21F

Abstract:
Material for containing radioactive caesium and/or rubidium comprising a phosphosilicated apatite matrix including in its chemical structure the radioactive caesium and/or rubidium to be contained, said phosphosilicated apatite matrix corresponding to the following formula:MtCaxLny(PO4)6âˆ’u(SiO4)uX in which:M represents Cs and/or Rb, Ln represents at least one trivalent cation, X represents at least one anion selected from the group consisting of 2Fâˆ’, S2âˆ’, 2Clâˆ’, 2Brâˆ’, 2Iâˆ’, 2OHâˆ’ and O2âˆ’, and t, x, y, and u are such that: 02&lE;x&lE;8 1&lE;y&lE;7 0&lE;u&lE;6 x+y+t=10, and the total number of positive charges provided by cations M, Ca and Ln are equal to (20+u).