Complex metal hydrides have emerged as one of the most promising solid-state hydrogen storage materials due to their high hydrogen volumetric and gravimetric storage capacities. Mg-based alloys such as NaMgH3 are especially interesting because of their light weight and hydrogen mobility. A complete understanding of the vibrational properties, e.g., phonons and dispersion of the NaMgH3 (001) surfaces, is still lacking. The study of surface phonons provides valuable insight into the surface structure and other phenomena specific to the surface, which can differ from the bulk. A density functional theory study addressing these issues is important to understand the relevant mechanisms that could facilitate hydrogen desorption in this material. This is an abstract of a paper presented at the 2013 AIChE Spring Meeting & 9th Global Congress on Process Safety (San Antonio, TX 4/28-5/2/2013).