Patent ID: 7521436

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 element chosen from a hydrogen, a halogen, an alkyl radical, an aminoalkyl radical in which the amino group optionally bears an alkyl substituent, an alkylamino radical, an alkyl radical bearing an aromatic substituent having at least one N atom wherein the aromatic substituent is not imidazolyl or pyridyl, and an alkyl radical bearing an aromatic thioether group.