Cellulose Nanocrystals: Properties, Production and Applications

461 MRS BULLETIN • VOLUME 43 • JUNE 2018 • www.mrs.org/bulletin T is a book for crystal chemistry lovers. It is beautifully produced and is comprised of seven chapters. The first four are a useful introduction to the topic, and the remaining three delve into different ways of looking at structures, with an emphasis on the concepts of the author and some colleagues (in particular, Michael O’Keeffe, Bruce Hyde, and Sten Andersson). All of the figures are available on the Internet if you show proof of purchase of the book. Chapter 1 begins with the polyhedral approach to structure building, which is familiar to chemistry undergraduates. This leads to building blocks, cubes, and unit cells. The chapter clearly explains simple cubes, body-centered cubes, face-centered cubes, the seven crystalline systems, and the idea of interstitial sites and radius ratios. Chapter 2 describes symmetry, space groups, and miller indices. This is a good introduction for the following chapters. A discussion of various common structures begins in chapter 3, starting with rutile. The description includes the joining of polyhedra and the calculation of bond distances. The author is somewhat dismissive of computer programs, and there is no mention of Crystallographic Information Files (CIFs). The latter omission is surprising, as they are required by most publications that include new structures. Today’s students need to understand the fundamentals, but also modern methods of crystal chemistry. There is also no mention of TiO2 polymorphs, anatase and Crystal Chemistry: From Basics to Tools for Materials Creation