#### What are Ceramic Materials and Their Uses? - Bright Hub ...

• The Miller indices (hkl) define the reciprocal of the axial intercepts • The crystallographic direction, [hkl], is the vector normal to (hkl) • dhklis the vector extending from the origin to the plane (hkl) and is normal to (hkl) • The vector dhklis used in Bragg's law to determine where diffraction peaks will …