Unit cell generates entire pattern by translation ONLY Unit cell generates entire pattern by translation ONLY.
Download ReportTranscript Unit cell generates entire pattern by translation ONLY Unit cell generates entire pattern by translation ONLY.
Unit cell generates entire pattern by translation ONLY Unit cell generates entire pattern by translation ONLY primitive centered Unit cells: primitive (1 motif) or centered (2 motifs)/cell Primitive cell Asymmetric unit = smallest portion needed to create unit cell 2 Asym./cells m m m m One C4 and 2 types of mirrors = 4m The 14 Bravais Lattices Dr S.J. Heyes, Oxford Univ. Space group P21/c P = primitive 21 = two-fold screw axis /c = glide (mirror) plane A -> B by inversion B C D A -> D by 21 screw axis A A -> C by glide plane View another molecule and its packing Triclinic P1 Orthorhombic P 212121 Monoclinic P 21/c Space Group examples Tetragonal Cubic Hexagonal Face-centered cubic Fm3m Rhombohedral Try Escher Websketch!