Dr. Nagaiyar Krishnamurthy was affiliated with the Materials Group, Bhabha Atomic Research Centre, Mumbai, India, for nearly four decades. He earned his BS degree at the University of Madras in 1974, his MSc in 1980, and his PhD in 1992, both at the University of Bombay. He is a professor at the Homi Bhabha National Institute and has been a member of Indian Rare Earths Technology Development Council. In addition, Dr. Krishnamurthy has published more than 100 papers and co-authored three books that include the first and second editions of Extractive Metallurgy of Rare Earths, published by CRC Press and winner of the Choice Outstanding Academic Title Award.