This is a comprehensive book that delves into the growth and characterization of guanidinium crystals using a wide range of techniques. The book covers various topics related to guanidinium crystals such as crystallography, crystal growth mechanisms, crystal defects, and crystal packing, as well as various techniques used for characterizing them, including X-ray diffraction, single crystal X-ray diffraction, scanning electron microscopy, Fourier-transform infrared spectroscopy, thermal analysis, and more. The author discusses the growth kinetics and optimization of guanidinium crystals in-depth, covering topics such as crystal growth rate, nucleation, crystal size, crystal habit, and crystal growth inhibitors. The book also explores the role of impurities and crystal growth modifiers in the growth of guanidinium crystals. Moreover, the author provides insights into the industrial applications of guanidinium crystals, including their use in pharmaceuticals, optoelectronics, and energy storage devices. The book is a valuable resource for researchers and scientists working in the field of crystal growth and materials science, as well as those interested in the properties and potential applications of guanidinium crystals. In summary, "Growth Investigation of Guanidinium Crystals" is an extensive exploration of guanidinium crystals, covering a wide range of topics related to their growth, characterization, and potential applications, making it a valuable addition to the field of crystal growth and materials science.