Reciprocal lattice rod
= Reciprocal lattice rod
= Relrod
{synonym}
An elongated reciprocal-space reflection caused by finite extent in the corresponding real-space direction. A foil of thickness $t$ has reflection breadth of order $1/t$ along its normal, increasing the range over which a reflection can intersect an <Ewald sphere>. The exact profile depends on the specimen shape and scattering model.