Hydroxyapatite (HAp) exhibits excellent biocompatibility but the low mechanical strength of normal HAp ceramics generally restricts its use to low load-bearing applications. Magnesium is an attractive material for use in biodegradable implants due to its low density, non-toxicity and mechanical properties similar to those of human tissue such as bone. Its biocompatibility makes it amenable for use in a wide range of applications from bone to cardiovascular implants. The aim of this work was to produce hydroxyapatite powder with chemical precipitation method and supplement Mg and investigate the eect of magnesium on structure of HAp powders. The Mg content ranged between 1 and 2 mol.%. The Mg+HAp powders were examined for morphology. The scanning electron microscopy, X-ray diraction, energy-dispersive X-ray spectroscopy were used to characterize the specimen powders.