Crystal Structure 1 3.1 Some Basic Concepts of Crystal Structure ...

Crystal Structure
Bragg Diffraction & Reciprocal Lattice Vectors
Fig. 3.12 (From A&M) The hcp structure. It can
be viewed as two interpenetrating simple
hexagonal lattices, displaced vertically by a
distance c/2 along the common c-axis, and
displaced horizontally so that the points of one lie
directly above the centers of the triangles formed
by the points of the other.
3.2 Bragg Diffraction and Reciprocal Lattice Vectors
Bragg Diffraction (Simple Picture)
Periodic lattice planes
Fig. 3.13 Schematic diagram illustrating the condition for Bragg diffraction.
Bragg diffraction condition:
2d sin = n
where n = 1, 2, 3, … (3.5)
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