The present invention is a composite powder having finely structured particles, obtainable by a method in which large particles are combined with small particles, the large particles having an average particle size in the range of 0.1 μm to 10 mm, The large particles comprise at least one polymer, the small particles are arranged on the surface of the large particles and / or distributed heterogeneously within the large particles, the small particles ranging from 0.05 μm to 50.0 μm Comprising precipitated spherical calcium carbonate particles having an average diameter within a range of spherical calcium carbonate particles comprising: a. Supplying a calcium hydroxide suspension； b. Introducing carbon dioxide or a gas mixture containing carbon dioxide into the suspension obtained from step a, c. It relates to a composite powder obtainable by the process of separating the resulting calcium carbonate particles and further adding 0.3% to 0.7% by weight of at least one aminotrialkylenephosphonic acid. Preferred application areas of the composite powder are additives, in particular polymer additives, for compounding, for the production of components, for applications in medical and / or microfabrication techniques and / or for the production of foamed bodies. , Including its use as additive material or starting material. Thus, the present invention is further applied in the fields of neurosurgery, oral surgery, maxillofacial surgery, cervical surgery, nasal and ear surgery, and hand, foot, chest, rib and shoulder surgery. It relates to a component obtainable by selective laser sintering of a composition comprising a composite powder according to the invention, excluding implants for the purpose of the invention. The invention further relates to spherical calcium carbonate particles that can advantageously be used to produce composite particles according to the invention, and uses thereof.本発明は、大粒子が小粒子と結び付けられる方法によって得ることができる、微細構造粒子を有する複合粉末であって、大粒子が、０．１μｍ～１０ｍｍの範囲内の平均粒径を有し、大粒
