FIG. 1: Twodimensional Bravais lattice and primitive lattice vectors ...

FIG. 1: Twodimensional Bravais lattice and primitive lattice vectors
FIG. 2: Hexagonal tiling

FIG. 3: Hexagonal tiling
FIG. 4: Wigner-Seitz cell

FIG. 5: Cubic, Tetragonal and Orthorhombic unit cells
FIG. 6: Body Centered Cubic conventional cell with two lattice points included (left) and lattice
with Wigner-Seitz unit cell (right)

FIG. 7: Face Centered Cubic conventional cell with four lattice points included (left) and Wigner-
Seitz unit cell (right)
FIG. 8: Simple Cubic, Body Centered Cubic and Face Centered Cubic

FIG. 9: Simple Tetragonal and Body Centered Tetragonal
FIG. 10: Face Centered Tetragonal and Body Centered Tetragonal are equivalent

FIG. 11: From left to right, Simple Orthorhombic, Base Centered Orthorhombic, Body Centered
Orthorhombic and Face Centered Orthorhombic
FIG. 12: Simple Orthorhombic can be obtained by stretching the base of of simple tetragonal
along one set of sides as in (a) and (b). If the same simple tetragonal is stretched along one of the
diagonal of its base, it gives the Base Centered Orthorhombic

FIG. 13: Simple Monoclinic and Base Centered Monoclinic
FIG. 14: Triclinic unit cell. The degree of symmetry is reduced to a minimum

FIG. 15: Rhombohedral (left) and Haxagonal (right)
FIG. 16: Hexagonal close packing -ABA- (HCP) on the left and cubic close packing -ABC- (CCP)
on the right.

11.3. SUMMARY OF CRYSTAL STRUCTURE 113
FIG. 17: A few examples of crystals constructed with a basis on a Bravais lattice.
Figure 11.16: Some examples of real crystals with simple structures. Note that in all cases the
basis is described with respect to the primitive unit cell of a simple cubic lattice.