Hydroxyapatite powder and method for producing same

A method for producing a hydroxyapatite powder, in which a reaction mixture is created in which milk of lime is reacted with phosphoric acid to form hydroxyapatite, wherein a method cycle comprising the following method steps is carried out:

• a) providing a suspension of hydroxyapatite starter particles in water,
• b) adding milk of lime and phosphoric acid to the suspension,
• c) reacting the milk of lime with the phosphoric acid in the suspension to form hydroxyapatite
• at a temperature in the range of >20° C. and <105° C. and
• at a pH in the range from 6.0 to 13.0,
• d) separating at least a portion of the hydroxyapatite particles out of the suspension,
• e) repeating method steps a) to d) at least once, wherein either the hydroxyapatite particles separated in method step d) or the hydroxyapatite particles remaining in the suspension in method step d) are used as the hydroxyapatite starter particles in method step a), and
• f) removing the hydroxyapatite particles which, in the dried state, have a median size of the primary particles of >0.1 μm from the method cycle.