Recebido em 18/2/99; aceito em 27/1/00Calcium phosphate compounds such as Hydroxyapatite (HAp) were prepared by hydrothermal synthesis with phycogenic CaCO 3 as starting material. Material obtained was characterised by usual methods (XRD, FTIR, TG, N 2 -adsorption, SEM and EDX) in order to study its physical-chemical characteristics. The prepared HAp showed that it may be suitable for use as a biomaterial.
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