Handout on Lattices and Unit Cells 2-D lattice handout from the University of Bristol Mineralogy Page Handout on Bravais Lattices Illustrations of the Isometric, Hexagonal, and Tetragonal Bravais lattices and unit cells Illustrations of the Orthorhombic, Monoclinic, and Triclinic Bravais lattices and unit cells READING ASSIGNMENTS NESSE: Pages 6-12 on lattices and Bravais lattices MINERALOGY TUTORITALS CD. Look at the 2D lattice demonstrations that show the 5 nets. Study the Bravais lattices in this demo. WHAT YOU NEED TO KNOW: How the ordered structure of a mineral relates to a lattice, be able to define lattice Know what the unit cell is and how it is used to construct the internal mineral structure The Bravais lattices. You should know the major types of bravais lattices (that is the relationships between axis length and angles). You should know the the major cell types--primitive, body centered, face centered, and all face centered. You don't have to know which crystal systems these occur in, but you should be able to recognize them given a figure. OPTIONAL READING Bristol Mineralogy Page--Intro to Lattices and Bravais Lattices The same material is included in the handouts, but there are nice views of the axial relations for each system here.