The morphology of fluorapatite-gelatine nanocomposites follows a fractal growth mechanism, in which elongated hexagonal seed units first develop into dumb-bell shaped aggregates and ending in notched spheres. In order to investigate the dependence of the morphology of the aggregates on the initial fluoride amount, a series of experiments was performed where the fluoride concentration was varied and calcium / phosphate concentrations were kept constant (Ca:P:F = 5:3:x, 0.46