Investigations using SEM revealed the presence of a uniform distribution of AlMn-based (Al8Mn5) intermetallic particles in Mg matrix in both the as-cast and the homogenized alloy. Secondary electron images of characteristic microstructure of both as-cast and homogenized Experimental Alloy 1 showed a uniform distribution of particles in the α – Mg matrix. These particles have an average length of 6.2 and 7.4 µm in as-cast and homogenized alloy, respectively. A higher volume fraction of these particles was observed in the homogenized ingot. EDS analysis of these particles indicates that they are rich in Al and Mn suggesting that these are AlMn-based intermetallics consistent with computational thermodynamics simulations from ThermoCalc TCMG4 database .