M. A. Wahab is Former Professor and Head of the Department of Physics, Jamia Millia Islamia, New Delhi, India, where he joined as Lecturer in 1985. Earlier, he served as Lecturer at the P. G. Department of Physics and Electronics, University of Jammu, Jammu and Kashmir, India, from 1981. During these years, he taught electrodynamics, statistical mechanics, theory of relativity, advanced solid-state physics, crystallography, physics of materials, growth and imperfections of materials, and general solid-state physics. He completed his Ph.

D. (Physics) from the University of Delhi, India, and M.Sc. (Physics) from Aligarh Muslim University, India. He has also contributed more than 100 research papers to several journals of repute and supervised 15 Ph.D. theses during his career at Jamia Millia Islamia. He has published the discovery of hexagonal close packing (HCP) and rhombohedral close packing (RCP) as the two new space lattices, along with his son (Mr.

Khurram Mujtaba Wahab), as theirfirst joint paper after his retirement.