IJSRSET1626122 | Received : 10 Dec. 2016 | Accepted : 20 Dec. 2016 | November-December-2016 [(2) 6: 512-514 ] © 2016 IJSRSET | Volume 2 | Issue 6 | Print ISSN: 2395-1990 | Online ISSN : 2394-4099 Themed Section: Science and Technology 512 FTIR Spectroscopic Studies on the Complex of Dl-Methionine with Trichloreacetic ACID R. Poornashri Mathangi * , A. Sajitha Banu Department of Physics, PSNA College of Engineering and Technology, Dindigul, Tamil Nadu India ABSTRACT The main objective of this present work is to grow a single crystal of complex DL-METHIONINE with TRICHLOREACETIC ACID and to investigate with FTIR spectroscopy. Keywords: Solution growth, FTIR, Vibrational Spectra. I. INTRODUCTION Crystal: A crystal is a solid in which the constituent atoms, molecules or ions are packed in a regular order with repeating pattern extending in all three spatial dimensions. The word crystal originates from the Greek word “ Krystallos” meaning “ clear ice”, as it was thought to be especially solid form of water. Most metals encountered in everyday life are poly crystals. Crystals are often symmetrically inter grown to form crystal twins [3]. Crystal refers to solid objects that exhibit well-defined and often pleasing geometric shapes. Many types of crystals are found in nature. Snow flakes, diamonds and common salts are common examples of crystals. Crystallography To acquire fundamental data and to explore the properties of any solid state device, good quality single crystal is essential. Hence crystal growth has become the most vital and fundamental part of material science, engineering, physical science, biology etc. Single crystals of SiC, Ga As, InP are in great demand. Crystallography is the scientific study of crystals and crystal formation. It is often employed by materials scientists. The understanding of crystal structures is an important prerequisite for understanding crystallographic defects. A number of physical properties are linked to crystallography. Crystal Structure The process of forming a crystalline structure is often referred to as crystallization. While the cooling process generally results in generation of crystalline material, under certain conditions, the fluid may be frozen in a non-crystalline state. Crystalline structure occurs in all classes of materials, with all types of chemical bonds. Almost all metal exists in a polycrystalline state; amorphous or single crystal metals must be produced synthetically, often with great difficulty. In a single crystal, the crystal lattice of the entire sample is continuous and unbroken to the edges of the sample, without any grain boundaries. But a polycrystalline sample is made up of number of small crystals known as crystallites. Crystal Growth Techniques The main categories of crystal growth techniques are: 1. Solid growth: It involves solid – solid phase transitions. 2. Melt growth: It involves liquid – solid phase transitions. 3. Vapour growth: It involves vapour – solid phase transitions.