Method of producing calcium phosphate particles in the form of a coating on a solid support comprising an oxide surface or a polymer surface or a powder, comprising: I) providing a first water solution containing calcium ions and water-soluble organic compound(s) comprising at least two functional groups, wherein at least one of the functional groups is a negatively charged group and at least one is a positively charged group, II) providing a second water solution containing phosphate ions and water-soluble organic compound(s) comprising at least two functional groups wherein at least one of the functional groups is a negatively charged group and at least one is a positively charged group, wherein the negatively charged groups of step I) and II) are selected from the group comprising -COOH, -OPO 3 H 2 and -OSO 3 H groups and the positively charged groups of step I) and II) are amine groups, III) mixing the solutions of and at ambient temperature to create calcium phosphate particles coated with the water-soluble organic compounds via the negatively charged groups, the pH being neutral or basic in the resulting mixture, followed by either IV) extracting the formed calcium phosphate particles coated with the organic compounds from the mixture of and washing of the coated particles, followed by drying to produce a powder of the calcium phosphate particles coated with the organic compounds; and V) removing the organic compounds by heating at a temperature in the range of 250°C - 600 °C to produce a powder of calcium phosphate particles, or VI) immersing a solid support comprising an oxide surface or a polymer surface into the mixture of III) whereby the positively charged groups of the organic compounds coating the calcium phosphate particles attach electrostatically to the solid support, followed by removing the solid support from the mixture and allowing the solid support attached to the calcium phosphate particles coated with the organic compounds to dry, followed by either VII) removing excess amounts of the organic compounds to form a coating of coated calcium phosphate particles on the solid support, or VIII) removing the organic compounds by heating at a temperature in the range of 200°C - 600°C to form a coating of calcium phosphate particles on the solid support. I) providing a first water solution containing calcium ions and water-soluble organic compound(s) comprising at least two functional groups, wherein at least one of the functional groups is a negatively charged group and at least one is a positively charged group, II) providing a second water solution containing phosphate ions and water-soluble organic compound(s) comprising at least two functional groups wherein at least one of the functional groups is a negatively charged group and at least one is a positively charged group, wherein the negatively charged groups of step I) and II) are selected from the group comprising -COOH, -OPO 3 H 2 and -OSO 3 H groups and the positively charged groups of step I) and II) are amine groups, III) mixing the solutions of and at ambient temperature to create calcium phosphate particles coated with the water-soluble organic compounds via the negatively charged groups, the pH being neutral or basic in the resulting mixture, followed by either IV) extracting the formed calcium phosphate particles coated with the organic compounds from the mixture of and washing of the coated particles, followed by drying to produce a powder of the calcium phosphate particles coated with the organic compounds; and V) removing the organic compounds by heating at a temperature in the range of 250°C - 600 °C to produce a powder of calcium phosphate particles, or VI) immersing a solid support comprising an oxide surface or a polymer surface into the mixture of III) whereby the positively charged groups of the organic compounds coating the calcium phosphate particles attach electrostatically to the solid support, followed by removing the solid support from the mixture and allowing the solid support attached to the calcium phosphate particles coated with the organic compounds to dry, followed by either VII) removing excess amounts of the organic compounds to form a coating of coated calcium phosphate particles on the solid support, or VIII) removing the organic compounds by heating at a temperature in the range of 200°C - 600°C to form a coating of calcium phosphate particles on the solid support.