Bioinspired aqueous synthesis of calcium hydroxyapatite Ca₁₀(PO₄)₆OH₂ and calcium fluorapatite Ca₁₀(PO₄)₆F₂ (FAP) is widely used for designing of dental, bone or restorative materials. One of the most actual questions in the study of bioinspired formation of nanocrystalline apatite materials is the role of physical and chemical factors in crystallographic orientation and shape evolution of crystals in biocomposite structure. Taking proper account of natural capability for selfassembly and preferred growth direction along c axis of apatite crystals one can use a substrate to provide highly textured dense apatite in the form of bulk material or coating, varying crystallinity and porosity of material by solution composition and experimental conditions.

The purpose of the current work is studying the effect of supersaturation, temperature and growth inhibitors on microarchitecture of inorganic material by the example of bioinspired growth of FAP crystals on 2D template in Ca²⁺ – PO₄^3– – F^– – H₂O system.

Highly (0001) oriented polycrystalline calcium fluorapatite (FAP) on fictionalized titanium substrates is obtained. The characterization of obtained apatite material (composition, structure, crystal domain size) is performed by means of electron and X-ray diffraction, X-ray photoelectron spectroscopy, scanning and transmission electron microscopy. Texture degree is determined by means of rocking curves. Intervals of parameters of monophase fluorapatite formation are determined. It is shown that the initial step of fluorapatite formation in aqueous solution is amorphous calcium phosphate. Physical and chemical conditions required for FAP texturing during column crystals formation are determined. It is shown that lower supersaturation leads to formation of highly textured dense FAP whereas coloumn FAP structures grow at high supersaturations. It is shown that the presence of aminoacids in solution reduces density and texture of polycrystalline FAP.

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