Prerequisite: college-level knowledge of physics and maths. In this course, the basic concepts needed to understand the crystal structure of materials are presented. Fundamental notions including lattices, symmetries, point groups, and space groups will be discussed and the relationship between crystal symmetries and physical properties will be addressed. The theory of X-ray diffraction by crystalline matter along with some experimental X-ray methods used to determine the crystal structure of materials will be covered. Further to this, the use of electrons in diffraction analysis will be introduced.