VNU Journal of Science Mathematics – Physics, Vol 37, No 2 (2021) 49 58 49 Original Article High pressure Effect of Elastic and Mechanical Properties of Hexagonal Gallium Nitride Nenuwe*, O N, Agbalagba O E Federal University of Petroleum Resources, P M B 1221, Effurun, Delta State, Nigeria Received 11 June 2020 Revised 30 June 2020; Accepted 15 July 2020 Abstract This study examines an effect of pressure up to 50 GPa on the elastic and mechanical properties of wurtzite gallium nitride (w GaN)[.]