Treatment of a stoichiometric hydroxyapatite (HAP), Ca10 (PO4) 6 (OH) 2, with PdCl2 (PhCN) 2 gives a new type of palladium-grafted hydroxyapatite. Analysis by means of powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy-dispersive X-ray (EDX), IR, and Pd K-edge X-ray absorption fine structure (XAFS) proves that a monomeric PdCl2 species is chemisorbed on the HAP surface, which is readily ...