Being biocompatible and biodegradable, Mg-alloys are potential for orthopaedic implant and cardiovascular stent applications. Mechanical strength of cortical bone and Mg-based alloys is almost similar which would devoid stress shielding effect. Mg-based alloys have been explored for use as degradable implants; it can be a suitable substitute for conventional implants employed as temporary implants. This would circumvent revision surgeries and hence would be a great relief to the patients. Mechanical properties of pure Mg are lesser than the desired strength and hence suitable alloying elements have been used to enhance the properties. This paper reports the studies on X-ray Diffraction (XRD) investigation on Mg-Zn alloys with the minor addition of calcium, manganese and strontium.