Patent ID: 8044037

Claim:
A phosphocalcic compound, having the following chemical composition: Ca (10-a) (Mg, K, Na) b (PO 4 ) 6-c (HPO 4 , CO 3 ) d (OH) 2-e (F, Cl, CO 3 ) f [(OA) (OE) P (O) —CR 1 R 2 —P(O) (OA) (OE)] g , in which 0<a<9; 0<b<2; 0<c<5; 0<d<2; 0<e<2; 0<f<2; g<0.5, A and E represent H, an alkali metal, an alkaline-earth metal or nothing, R 1 represents H, OH or a halogen and R 2 represents an alkyl radical bearing an aromatic substituent comprising at least one N atom chosen from imidazolyl and pyridyl.