The mineral clausthalite is composed of lead selenide (PbSe). This mineral adopts the NaCl structure - the anions are arranged in face-centered cubic structure. Fill in the needed information below and explain why: Latice points where the Pb2+ are: a. edge b. corner c. body d. face

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Crystal Lattices and Unit Cell

Consider a crystal. The regular and repeating pattern of constituent particles is the most distinguishing feature of crystalline solids. A crystal lattice is formed when these particles are replaced with representative points. The three-dimensional arrangement of constituent particles is known as a crystal lattice. Unit cell is that the smallest portion of a space lattice which when repeated in several directions, generate the whole lattice. Unit cell is a building block of a lattice. It is the smallest unit of cell.